The second channel fell through. I need a university to sponsor that channel and provide the course materials, I was hoping to just do the animation and narration. Still hopeful it will happen further down the line, but for now I just don't have enough time.
Real Engineering Did you consider Pluralsight for providing more in depth courses? I love it, professional and viewer friendly material with monetary compensation baked in. No university required, I hope. :)
Hi İndustries are not responsible for implementing sustainable practies. Embodied energy of a material/object is a fundamental index of impact on the sustainability. Are these T or F?
Everything is correct except for the rubber slope (not a linear material). For those interested, read on ;) I was actually able to do some tensile strength testing on rubber in highschool and university for some smaller project. But you can try it yourself with a rubber band (broader bigger ones are better), stretch it and at some point it will become more white. All of it sudden it will be stiffer and a lot, the slope will increase drastically. This is because rubber consists out of long (polymer) chains which have small bridges (cross-linking, usually sulfur) in between the long chains. Initially you're not pulling on the long chains, what you feel is the resistance to realigning the long chains within the material. However when it turn more white the material becomes more crystalline and you start pulling on the actual long (polymer) chains which will resist deformation much more but are also stronger.
Shouldn't the y-axis represent force instead of stress? I think that the stress in the reduced cross section should continue to grow in this stress-strain graph after the ultimate stress, but the force will be lower due to the reduced area.
Why is "toughness" measured by the area under the graph, and not the Y-axis height of the breaking point (which is where the amount of energy exceeds the strength of the material). Couldn't a material have an arbitrarily large graph, simply because it has a young modulus of around 45 degrees. This would make it have a greater area (and thus seems tougher) that a material with a very steep one - even though the second deforms much LESS and can absorb many MORE Pascas before breaking?
Hi! I've heard you said before you're a materials engineer, I started my first semester in college for the same degree and I would like to ask you if you think is a good option as a career, does it has enough emplyment? is it good paid? I would like to hear your thoughts. Thanks and keep the good work up!
Adam -亚当- No, I think what happened was that the rubber o ring shrank in the cold of night and so it failed to seal a section of the solid rocket booster. And so when the shuttle launched, the exhaust burned a hole right through the booster and then the steel strut connecting it to the shuttle, and finally through the main fuel tank...
Adam -亚当- Correct. It's quite sad actually, because the engineers responsible for overseeing the boosters were aware of the problem, and warned the administration to delay the launch to allow the o-rings to warm up and expand (apparently it was an unusually chilly night in Florida). One of those engineers actually stormed home when admin refused to delay the mission, and in an interview admitted that when his home phone began ringing he already knew that the worse had happened. That's how certain they were of the problem; which shows how bad the NASA administration were at dealing with potential problems. You'll notice now that NASA is far more careful and will cancel a flight for weeks if a problem is found. So it worked out for the best, it's just sad seven people had to lose their lives to learn that lesson.
oh my god! I never knew the engineers were that certain! I had watched a documentary about Feynman, and how he was brought onto the board and he had been used - in that he was fed the answer in a 'hint' by someone who didn't want to speak out loud about the issue. Seems like you are very well informed buddy, what do you think about the SpaceX explosion recently? I read "Caceres noted that a fueling failure could occur from a small piece of brittle metal that begins vibrating, breaks apart, lodges into a fuel line and causes combustion" - you think that is a plausible cause?
This video is super fast, hopefully you got a basic idea of material properties. I wanted to create a second channel where I can explain things slowly and in detail for the people who want that kind of content. I am hoping to partner with a university and release proper college grade education on that channel. The link is in the description. Thanks guys. Really appreciate your support. Back to normal videos soon! Hoping to do a Q&A at the end of the year, so go ahead and follow me on twitter if you have an questions you would like to ask. twitter.com/Fiosracht
well a non-ductile material certainly can't be drawn into a wire. Ductile just means the material deforms significantly before failing. The opposite of that is brittle, where the material shatters suddenly.
@@BangMaster96 I'd say electrical but that's pretty hard to determine. It mostly depends on who's learning it I'd say. I'm studying material engineering btw.
@@Max-pn8dk anything electricity related is just fucking annoying. I hate it so much i avoided it like the plague during my formative years as a chemical-technical lab assistant.
I've been in the trades my whole life. Tool & Die, Model Maker, Welding, and sheet metal fabricator. I got a degree in Mechanical Engineering while working nights, and I enjoy your series a great deal. It's easy to forget that engineering touches everything we use in our daily lives. Your series makes is easy to understand and appreciate what goes into these products.
And all of those were termed networks IBM long before encryption method and the business had you back two play mirror mirror n the spoils,owe dear matter as say,objected old chap,goose March next.
Biggest confusion in material science about stress-strain related stuffs, is that whether it should be considered under "mechanical" properties or not. In reality it's basic to thermal, electrical, magnetic, optical and acoustic properties as well. Because the nature of external force can be anything. eg. electric potential difference/voltage applied on the material can also cause strain and thus stress, which are actually internal reaction forces to the external action forces. Ironically, internal reaction of a material, ie the stress is fundamentally of electromagnetic type.
@@BirdRaiserE Einstein never nearly understood TIME, E=MC2, F=ma, gravity, or ELECTROMAGNETISM/energy. He was, in fact, a total weasel. c2 represents a dimension ON BALANCE, as E=MC2 IS F=ma in accordance with the following: UNDERSTANDING THE ULTIMATE, BALANCED, TOP DOWN, AND CLEAR MATHEMATICAL UNIFICATION OF ELECTROMAGNETISM/energy AND gravity, AS E=MC2 IS CLEARLY F=ma: The stars AND PLANETS are POINTS in the night sky. E=MC2 IS F=ma, AS this proves the term c4 from Einstein's field equations. SO, ON BALANCE, this proves the fourth dimension. ELECTROMAGNETISM/energy is gravity. Gravity IS ELECTROMAGNETISM/energy !!! TIME is NECESSARILY possible/potential AND actual IN BALANCE, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. INDEED, TIME dilation ULTIMATELY proves ON BALANCE that E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. Gravity IS ELECTROMAGNETISM/energy. Gravity AND ELECTROMAGNETISM/energy are linked AND BALANCED opposites, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity; AS gravity/acceleration involves BALANCED inertia/INERTIAL RESISTANCE; AS GRAVITATIONAL force/ENERGY IS proportional to (or BALANCED with/as) inertia/INERTIAL RESISTANCE. Gravity IS ELECTROMAGNETISM/energy. E=mC2 IS CLEARLY F=ma. This NECESSARILY represents, INVOLVES, AND DESCRIBES what is possible/potential AND actual IN BALANCE, AS ELECTROMAGNETISM/energy is gravity. Gravity IS ELECTROMAGNETISM/energy !!! By Frank DiMeglio
It's pretty insane how much you've grown by just a few really high quality videos. So happy that it's going well for you, I hope that you keep growing so you can do this full time without having to think about economy.
Trust me on this m8, 1 channel is probably the better way to go, just less clutter(aka not needing to worry about not having uploaded a video to one or the other channel in a while), and the youtube algorithms like it more when you upload more videos on a single channel
The second channel will be seldom used for now. It's purely for videos with lower production value and more technical content. I want to keep this channel for really high quality fun videos.
@@RealEngineering THE UNIVERSAL, SIMPLE, CLEAR, AND TOP DOWN MATHEMATICAL PROOF THAT E=MC2 IS F=MA (ON BALANCE): It is a very great truth that THE SELF represents, FORMS, and experiences a COMPREHENSIVE approximation of experience in general by combining conscious and unconscious experience. TIME dilation ULTIMATELY proves ON BALANCE that ELECTROMAGNETISM/energy is gravity, AS E=MC2 IS F=ma. INDEED, TIME is NECESSARILY possible/potential AND actual IN BALANCE; AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. E=MC2 IS F=ma. This NECESSARILY represents, INVOLVES, AND DESCRIBES what is possible/potential AND actual IN BALANCE, AS ELECTROMAGNETISM/energy is gravity. Gravity IS ELECTROMAGNETISM/energy. Energy has/involves GRAVITY, AND ENERGY has/involves inertia/INERTIAL RESISTANCE. "Mass"/ENERGY involves BALANCED inertia/INERTIAL RESISTANCE consistent with/as what is BALANCED electromagnetic/gravitational force/ENERGY, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. GRAVITATIONAL force/ENERGY IS proportional to (or BALANCED with/as) inertia/INERTIAL RESISTANCE, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. NOW, carefully consider what is THE MAN who is standing on what is THE EARTH/ground. Touch AND feeling BLEND, AS ELECTROMAGNETISM/energy is gravity; AS gravity/acceleration involves BALANCED inertia/INERTIAL RESISTANCE; AS E=MC2 IS F=ma. Very carefully consider what is BALANCED BODILY/VISUAL EXPERIENCE. (LOOK up at what is the blue sky, AS THE EARTH is ALSO BLUE.) Gravity AND ELECTROMAGNETISM/energy are linked AND BALANCED opposites, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. The stars AND PLANETS are POINTS in the night sky. Great. It ALL CLEARLY makes perfect sense, AS BALANCE AND completeness go hand in hand. E=MC2 IS CLEARLY F=ma ON BALANCE. Objects AND MEN fall at the SAME RATE (neglecting air resistance, of course), AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. The rotation of WHAT IS THE MOON matches it's revolution, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. Gravity IS ELECTROMAGNETISM/energy. Consider what is THE EYE. So, LOOK at what is the fully illuminated (and setting) Moon AND the orange Sun ON BALANCE. Now, think about what is LAVA. E=MC2 IS F=ma. SO, we then multiply ONE HALF times one half in order to determine the size of the Moon. (It IS about one fourth the size of the Earth.) This is CONSISTENT with the fact that the Moon IS (on balance) LAND. Therefore, the density of THE SUN is (ON BALANCE) about ONE FOURTH of that of what is THE EARTH; AS E=MC2 IS then CLEARLY proven to be F=ma; AS ELECTROMAGNETISM/energy is gravity. Very importantly, outer "space" involves full inertia; AND it is fully invisible AND black. Again, it all CLEARLY makes perfect sense ON BALANCE !!! The BULK DENSITY of the Moon is comparable to that of (volcanic) basaltic LAVAS on the Earth. The energy density of LAVA IS about THREE TIMES that of water. SO, now, get a good and CLEAR LOOK at what is the ORANGE SUN !!! We WOULD then multiply ONE THIRD times one half in order to obtain the surface gravity that is experienced by the man on the Moon. (It IS one sixth of that of the man who is on the Earth.) The maria ("lunar seas") on the Moon do take up ONE THIRD of what is the near side of the Moon. Excellent. The Moon is ALSO BLUE on balance. Great !!! Now, in conclusion, the land surface area of THE EARTH is 29 PERCENT; AND this is EXACTLY ON BALANCE WITH BOTH one third AND one fourth; AS ELECTROMAGNETISM/energy is gravity; AS E=MC2 IS CLEARLY AND NECESSARILY F=ma !!!!! GOT IT !!! GREAT. E=MC2 IS CLEARLY F=ma ON BALANCE. ELECTROMAGNETISM/energy is CLEARLY proven to be gravity ON BALANCE. Gravity IS ELECTROMAGNETISM/energy. It must be, and it is. By Frank DiMeglio
I get the desire to keep the high production videos separate to these (this video was great, by the way) but to be blunt, and not write a few paragraphs of my opinion/reasoning, I'm not sure your channel is large enough yet to already consider splitting up content on a different channel. Even huge RUclipsrs lose views on secondary channels. I understand the potential partnership w/ a university may call for it, but if it ends up being just a personal choice, my vote it to keep them here and maybe just label these types of videos differently (maybe a short [tag] in title or a slightly different thumbnail theme). Obviously, at the end of the day, you know your situation best. Good luck with getting that partnership, I know everyone who likes your main content will gladly watch proper college grade videos.
As someone who is also stuck on what to do with separate series on a channel, I find these comments very insightful. :) I am very sure +Real Engineering can pull it off either way (and especially if he can partner with a Uni, I think a separate sponsored channel is definitely the way to go) - but I'm sure an informative title tag would work too
I didn't have a good professor for my Strength of Materials class, and this 6 min video taught me more than his class did in 4 months. More videos on the concepts for material properties would be amazing! Specifically Mohr's Circle and its uses.
As a mechanical engineer, I find that your videos are excellently presented. They cater to those without much background in the subject while not insulting the viewer's intelligence. Well done. It would be great to see your videos in classrooms.
As an Mech/aerospace guy I can def say a lotta material scientists/metallurgists really like playin around in the lab haha this is what I observed when I was taking my mechanics of materials course lab they were putting all sorts of stuff in the utm needless to say the lab tech was mad😂
Yes please! I'll be taking mechatronic engineering in the coming years and all I get for any RUclips educational videos are repeated "these are the basics of what it is, now join our university!". I know what it is but is like to educate myself beforehand lol. You seem like you took mechanical and/or aerospace engineering but still it helps since mechatronic covers such a huge range. Hell maybe you can check out other engineering branches like bioengineering some time. I really like the content here. Maybe now RUclips will see a growth on proper engineering videos like it did with physics videos. Maybe how another person to help make more videos?
it is NOT true that less force is needed after ULT point. in fact, more force is needed to deform it. This can be seen using the equation of true stress ( F/ instantaneous area) instead of engineering stress ( F/ initial area)
definitely you are right....but the thing you are talking about we called it true stress... and generally in engineering we deals with engineering stress (we take are as constant)..
I REALLY liked the video, but it left me wanting even more! About how exactly can materials be tailored to fit specific criteria of hardness, ductility, etc. I didn't even imagine that about a katana, or any sword for that matter. Great video!
I remember watching this in my first semester of sophomore year in high school knowing it would be relevant to my future schooling and now I’m a junior material science engineer and have to perform tests and make stress strain curves from load and extensometer data
I am just a guy who likes to spend his free time on RUclips, dicking around watching videos over space exploration and a few outlandish scientific concepts. I already have a hard time figuring out what to do with my life, and I'm currently doing an exchange year in Germany wondering what to study in college(or even study straight away at all ). Finding your videos in my reccommeded list has really sparked an intrest for me in material science, a branch of science I've never really bothered to think to much about before, yet also made it clear to me that I would live to study some form of physics. It's so hard to be in a classroom thinking about when the subject material will be relevant, or staring at marvels of the world without understanding what intellectual work went into it (let alone understanding the work in the first place). So, thank you. And please, after watching your latest video on the power grid, keep up the good work
Haha sorry, ideally there would be a video there. I'm only one man, difficult to get it all done. Hoping to hire a part time animator for the second channel.
erm, not exactly. Yes, hardness is tested by using local compression, as shown in the video. Yes, hardness is essentially the ability of the material to resist dents and scratches which are typically caused by compression forces applied to the material "from outside" (which is an important distinction, but can otherwise be ignored in this discussion). No, stiffness is not specific to expansion. It relates to all stresses which may exist "within the material", including tension, compression and shear, which further include bending and torsion. Material stiffness is most readily defined by Young's Modulus (E), which relates how much the material will deform under stress. Take a steel wire and a rubber band of the same size. Apply the same tension force to each. The wire will barely stretch (imperceptibly), whereas the rubber band will stretch a lot. The wire is much stiffer. Take a rock and a marshmallow (same size) and apply the same compression force the each. The rock is much stiffer. Not-quite-coincidentally, the steel wire and the rock are also harder than the rubber band and the marshmallow. Not-so-coincidentally, the wire and rock are also stronger. Stiffness, strength, and hardness are related, but hardness is more of an empirical property, whereas stiffness and strength are more of an engineering property. I hope I am not too confusing. Let me know if you have any questions.
I'm guessing you're going to get a huge surge of subscribers from the MinutePhysics collaboration. Hi, I'm one of them. I watched a handful of your videos to make sure I'd be interested (hence this comment being on this video, not the collab one), they were all great. Looking forward to more, keep up the good work, all that kind of stuff.
Chinese like material-technology. Some things-parts-modules are meant to be = strong, weak, flexible, soft-angular hard-edge-perpendicular, push-pull, indicative-squeeky when near limits, damaged(cheap repair-replacement) when near limits of other parts-materials, break-away, dented, rotated away upon impact beyond structural-design, mangled(controlled disposal size) when suffered unreasonable abuse, ... ... Usual instruction-manual is the common-materials employed as indicators of maximum stress-usage patterns (not price-tag) sit(stresses) outwards until near limits then will flex-collapse inwards (hinges and joints preloaded-biases) being an example.
Hrm went to look for your second channel. Looks like that didn't exactly pan out for you, huh? That's too bad, it sounded like it had a lot of potential. Same for revisiting the topic of material properties and material science. I know you touch on it once in a while, but I can't recall any specific videos you've made about such subjects in quite some time. (wink wink nudge nudge) =P
You should clarify that the proper way to measure Young's Modulus is by V^2*d=E (with v, velocity of sound in the material, d the density and E, Young's Modulus), because, although it gives us an approximate value, it's not the real. On the other hand, when you talk about tenacity, is the surface below the curve, but excluding the elastic energy (that recovers): so, it should be the total area minus the area below the line (with the slope E). Pretty good video, though. +1
Tensile test: stress-strain curve yield strength - elastic deformation ultimate strength - plastic deformation, necking Young's modulus/ elastic modulus (how stiff the material is) safety factor stiff (high carbon steel) flexible (rubber band) tough (the material absorb a lot of energy without breaking) ductile (deform under pressure) brittle (glass, ceramics, cast iron, the material break with very little deformation) hardness (is a measure of how resistant solid matter is to various kinds of permanent shape change when a compressive force is applied, directly related to the stiffness and yield strength of the material, rockwell hardness test)
I know this is a rare ask, and coop videos aren’t your thing, BUT…. I have a theory, based on past videos of yours… that @kentuckyballistics is wrong about the hot load in his gun. Video for reference: ruclips.net/video/1449kJKxlMQ/видео.html I don’t think it was solely an “extremely hot load” in the round he fired, that sheared off 4 threads on the cap… that it was repeated stresses that caused the threads to fail at a much lower force than is tested, due to the repeated use… Is there anyway you can analyze and confirm? I’m not smart enough to know the science… I’m just crossing streams and hoping my theory is wrong. Because if so… and I’m not saying it IS so…. But, if so… the gunsmith needs to recall, rework and reengineer his materials science to prevent this catastrophic failure from happening in the future. Please, and thank you for the consideration.
✋, just a question, is the tensile strength of wires multiplicative? that is if a steel wire yields after x Newtons of forze, and you use 2 or 3 wires, would you need 2*x and 3*x newtons for the same effect??
Hello, I am a mechanical engineering student and i think your work is exellent. If you dont mind i would like to suggest you a topic for your buket list through this problem I came across. Why is it that aluminum, that is a very ductile material due to its crystal structure, would behave like a brittle material in a tensile test? My TA could not explain why. Thank you, Real Engineering.
Quizzes and analytical questions on mechanical drawings, shop floor drawings, also production process machining steps etc through your channel Alok Kumar Section engineer in indian railway
I got a 4 year degree in engineering for $10,000, and that was only because I took out loans so I didn't have to work while going to college. Now I've got a good job lined up, so it's hyperbole to say that college in the Us is prohibitively expensive.
Do you have a prediction for how much funding is needed for a really robust material science research program nationally/internationally? How far off are we currently? Thanks, love your videos!
To be perfectly honest, in my humble opinion, of course without offending anyone who thinks differently from my point of view, but also looking into this matter in a different perspective and without being condemning of one views and trying to make it objectified, and by considering each and everyone’s valid opinion, I honestly believe that..I completely forgot what I was about to say.
1:55 you have the graph wrong. You are missing here the point of slide( sorry for poor translation, i take it literally from czech language), and there the graph rises, then goes down and then finally up again. We learned that on our highschool in subjects of technology and mechanics. ...
Hello RE, from what I can see I would guess you come from mechanical engineering right? Your focus on metal based materials makes me believe that this is the case. I'm happy to see somebody promoting engineering topics and knowledge to the world but as a material science engineer I feel obligated to point out that this a very simplified and basic look at the topic and that is okay but you should point out that this is the case. People do tend to believe they know all kind of things after watching two or three 10 minute vids on the YT.
Actually, how about a video about that sword thing. I'm not really clear how a hard edge on a sword with a ductile core can absorb much of the energy of a blow meaningfully without that hard edge fracturing.
why is everyone in the freaking need of a second channel? this guy is uplaoding rather rarely (but with high quality, i know) and now he is effectivly doubling this timeframe by splitting the content up in 2 channels. i dont get it.
It almost sounds like you're not having fun talking about it. A bit too fast for me, I remember learning about metal properties years and years ago in school and the way it was taught to me was so unfun that even though the concept is amazing it just put me off engineering. I mean, I am an engineer now but, I'm lacking in material properties knowledge.
While the things you said at the end there are right, you should not use a Katana for an example, a european Sword would be more adequate in this situation. The Steel used for a traditinonal Katana is quiet brittle if compared to, say a medival Longsword. "Katana-Steel" has many inpurities in it. That is because the Oven (Whose name i forgott, i have to admit that) cant reach the temperature to "cook" them out, they are instead spread out in the material to even it out.
Is it accurate to say that the stress-strain graph is 3-dimensional, with time as the Z-axis? I didn't understand the plot at first since there are multiple x values for a given y value. Might still be a function, but didn't make sense in the context of a test until I thought about it ito of applying and removing the stress over time. I think people need to be explicit about time as a factor when explaining this chart.
i think it's better if you upload all your content on your first channel as i think the videos will be more watched and therefor you can get more money, which would help your channel grow with better content and then cover your living ;D
If stress is defined as the force divided by the cross-sectional area, and the area decreases during "necking", then wouldn't the value of the stress increase since you're dividing the force by a smaller and smaller number? Or is the force not a constant value?
I thought the Titanic hit an iceberg at just under top speed and was able to stay afloat for 2 hours, that doesn't sound like a failure that sounds like a win. It should have sunk straight away if the steel was brittle the damage would've been more extensive
hey ..u have great ability of understanding but...the concept you are talking about is somehow wrong (2:03)...as stress is internal resistance...due to decrease in area it got increased if we apply the same force or increased it...the main reason for decrease is that we don't use the original area..... I think you have to read about true stress and engineering stress.. Although mainly in engineering we solve many problems via engineering stress ....but if we use true stress then the graph increases ,not bent to down...
Went to the second channel, but the last upload was 3 years ago 😢 Edit: I read the pinned comment and I understand why he doesn't upload anymore but i always feel sad when a channel has a long hiatus or needs to be abandoned by it's owner..
I think.when you were talking about the tensile test it would have been.worth mentioning the difference between "engineering stress" and "true stress", but otherwise it's great :)
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The second channel fell through. I need a university to sponsor that channel and provide the course materials, I was hoping to just do the animation and narration. Still hopeful it will happen further down the line, but for now I just don't have enough time.
Real Engineering Did you consider Pluralsight for providing more in depth courses? I love it, professional and viewer friendly material with monetary compensation baked in. No university required, I hope. :)
Maybe get some friends to work on the second channel.
Awww... as an overly bored seventh grader that would be amazing.
Hi
İndustries are not responsible for implementing sustainable practies.
Embodied energy of a material/object is a fundamental index of impact on the sustainability.
Are these T or F?
Please don't give up on a more technical channel. I am a starting my third year of mechanical engineering and I very much value your content.
Wow, you've just summarized my 60 hour material science course in 6 minutes lol.
Nelson De Vera I agree
lol.
This is why the internet is a miracle
We only spent like 5 hours on this lol, but the video is very clear and well done
thats college for you
this is the best ebgineering channel on youtube, fact
Everything is correct except for the rubber slope (not a linear material).
For those interested, read on ;)
I was actually able to do some tensile strength testing on rubber in highschool and university for some smaller project.
But you can try it yourself with a rubber band (broader bigger ones are better), stretch it and at some point it will become more white.
All of it sudden it will be stiffer and a lot, the slope will increase drastically. This is because rubber consists out of long (polymer) chains which have small bridges (cross-linking, usually sulfur) in between the long chains. Initially you're not pulling on the long chains, what you feel is the resistance to realigning the long chains within the material. However when it turn more white the material becomes more crystalline and you start pulling on the actual long (polymer) chains which will resist deformation much more but are also stronger.
I'm not seeing any videos on the second channel. I'm an aspiring materials engineer, and I'd love to learn more.
Can you talk about the properties of nippon steel and how it made the Japanese airplanes of WW2 so manuverable?
Shouldn't the y-axis represent force instead of stress? I think that the stress in the reduced cross section should continue to grow in this stress-strain graph after the ultimate stress, but the force will be lower due to the reduced area.
Why is "toughness" measured by the area under the graph, and not the Y-axis height of the breaking point (which is where the amount of energy exceeds the strength of the material). Couldn't a material have an arbitrarily large graph, simply because it has a young modulus of around 45 degrees. This would make it have a greater area (and thus seems tougher) that a material with a very steep one - even though the second deforms much LESS and can absorb many MORE Pascas before breaking?
Great video! Love your voice by the way
its a very refreshing change not to have some yank rarh-rarh'ing at me and waflling on ....
Hi! I've heard you said before you're a materials engineer, I started my first semester in college for the same degree and I would like to ask you if you think is a good option as a career, does it has enough emplyment? is it good paid? I would like to hear your thoughts. Thanks and keep the good work up!
Thank you very much for this video :)
Didn't embrittlement contribute to the failure of the first shuttle explosion on the O ring? It became brittle at low temperatures.
Adam -亚当- No, I think what happened was that the rubber o ring shrank in the cold of night and so it failed to seal a section of the solid rocket booster. And so when the shuttle launched, the exhaust burned a hole right through the booster and then the steel strut connecting it to the shuttle, and finally through the main fuel tank...
ah, thanks. So when they said 'it failed' they mean it failed to hold in the hot gases not broke or fractured?
Adam -亚当- Correct. It's quite sad actually, because the engineers responsible for overseeing the boosters were aware of the problem, and warned the administration to delay the launch to allow the o-rings to warm up and expand (apparently it was an unusually chilly night in Florida).
One of those engineers actually stormed home when admin refused to delay the mission, and in an interview admitted that when his home phone began ringing he already knew that the worse had happened. That's how certain they were of the problem; which shows how bad the NASA administration were at dealing with potential problems.
You'll notice now that NASA is far more careful and will cancel a flight for weeks if a problem is found. So it worked out for the best, it's just sad seven people had to lose their lives to learn that lesson.
oh my god! I never knew the engineers were that certain! I had watched a documentary about Feynman, and how he was brought onto the board and he had been used - in that he was fed the answer in a 'hint' by someone who didn't want to speak out loud about the issue.
Seems like you are very well informed buddy, what do you think about the SpaceX explosion recently? I read "Caceres noted that a fueling failure could occur from a small piece of brittle metal that begins vibrating, breaks apart, lodges into a fuel line and causes combustion" - you think that is a plausible cause?
Oh ho wot o,that yer new con struct bomb hat?
15 videos and 187k subscribers? Efficiency level: engineer
his other acc has 0 videos and 15 k subscribers
Hey, martis, what is that icon from? I see it everywere!
it's a brush from gimp 2.8
martis martiis
15,000/0
(infinity)0 = 0
Ratio of subscribers to videos: beyond infinity (or, y'know, undefined)
Absolute perfection
Sounds like a business channel.
This video is super fast, hopefully you got a basic idea of material properties. I wanted to create a second channel where I can explain things slowly and in detail for the people who want that kind of content. I am hoping to partner with a university and release proper college grade education on that channel. The link is in the description. Thanks guys. Really appreciate your support. Back to normal videos soon! Hoping to do a Q&A at the end of the year, so go ahead and follow me on twitter if you have an questions you would like to ask. twitter.com/Fiosracht
Hi, I thought ductile meant can be drawn out into a thin wire? :-)
That's an excellent idea ! You should contact the guys in CrashCourse, I'm sure they would be interested in patronizing you as well.
well a non-ductile material certainly can't be drawn into a wire. Ductile just means the material deforms significantly before failing. The opposite of that is brittle, where the material shatters suddenly.
Real Engineering ahhh thanks
Real Engineering man i understand english well but as a 13 years german dict.cc I'm coming xD
As a Materials Engineer I can confirm the information in this video is correct and a great introduction into materials.
What's harder, Material Engineering or Electrical Engineering ?
Sunny shah hahahahaa EE is the hardest by far
@@BangMaster96 Material, as all fundamental engineering is based on the Materials you can use.
@@BangMaster96 I'd say electrical but that's pretty hard to determine. It mostly depends on who's learning it I'd say. I'm studying material engineering btw.
@@Max-pn8dk anything electricity related is just fucking annoying. I hate it so much i avoided it like the plague during my formative years as a chemical-technical lab assistant.
I've been in the trades my whole life. Tool & Die, Model Maker, Welding, and sheet metal fabricator. I got a degree in Mechanical Engineering while working nights, and I enjoy your series a great deal. It's easy to forget that engineering touches everything we use in our daily lives. Your series makes is easy to understand and appreciate what goes into these products.
those wordsa are:
stiff
strong
ductule
brittle
tough
hard
right?
ductile, but yes, these are it.
ductule
This should really be called "Mechanical Properties". Materials have all kinds of other properties such as thermal, electrical, optical etc.
And all of those were termed networks IBM long before encryption method and the business had you back two play mirror mirror n the spoils,owe dear matter as say,objected old chap,goose March next.
Nathan Soper NO, "Physical Properties", which is a sub speciality of metallurgy.
I agree Nathan
I'm not complaining.
Biggest confusion in material science about stress-strain related stuffs, is that whether it should be considered under "mechanical" properties or not. In reality it's basic to thermal, electrical, magnetic, optical and acoustic properties as well. Because the nature of external force can be anything. eg. electric potential difference/voltage applied on the material can also cause strain and thus stress, which are actually internal reaction forces to the external action forces.
Ironically, internal reaction of a material, ie the stress is fundamentally of electromagnetic type.
Super interesting video. Nice work. :-)
Today I Found Out
hey, I showed your monopoly video to my family! love your channel, I'm subscribed.
Allegedly
@@BirdRaiserE Einstein never nearly understood TIME, E=MC2, F=ma, gravity, or ELECTROMAGNETISM/energy.
He was, in fact, a total weasel.
c2 represents a dimension ON BALANCE, as E=MC2 IS F=ma in accordance with the following:
UNDERSTANDING THE ULTIMATE, BALANCED, TOP DOWN, AND CLEAR MATHEMATICAL UNIFICATION OF ELECTROMAGNETISM/energy AND gravity, AS E=MC2 IS CLEARLY F=ma:
The stars AND PLANETS are POINTS in the night sky. E=MC2 IS F=ma, AS this proves the term c4 from Einstein's field equations. SO, ON BALANCE, this proves the fourth dimension. ELECTROMAGNETISM/energy is gravity. Gravity IS ELECTROMAGNETISM/energy !!!
TIME is NECESSARILY possible/potential AND actual IN BALANCE, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. INDEED, TIME dilation ULTIMATELY proves ON BALANCE that E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. Gravity IS ELECTROMAGNETISM/energy.
Gravity AND ELECTROMAGNETISM/energy are linked AND BALANCED opposites, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity; AS gravity/acceleration involves BALANCED inertia/INERTIAL RESISTANCE; AS GRAVITATIONAL force/ENERGY IS proportional to (or BALANCED with/as) inertia/INERTIAL RESISTANCE. Gravity IS ELECTROMAGNETISM/energy.
E=mC2 IS CLEARLY F=ma. This NECESSARILY represents, INVOLVES, AND DESCRIBES what is possible/potential AND actual IN BALANCE, AS ELECTROMAGNETISM/energy is gravity. Gravity IS ELECTROMAGNETISM/energy !!!
By Frank DiMeglio
@@frankdimeglio8216 erm, wrong comment section?
It's pretty insane how much you've grown by just a few really high quality videos. So happy that it's going well for you, I hope that you keep growing so you can do this full time without having to think about economy.
Trust me on this m8, 1 channel is probably the better way to go, just less clutter(aka not needing to worry about not having uploaded a video to one or the other channel in a while), and the youtube algorithms like it more when you upload more videos on a single channel
The second channel will be seldom used for now. It's purely for videos with lower production value and more technical content. I want to keep this channel for really high quality fun videos.
Ah I understand what you mean, btw you've got a nice growth curve going on youtube :p gratz
I hope it wont be inactive for long, I really enjoyed this and would love to see more.
I learned more in this video than I did in a semester taking that materials class.
Very pumped for even more Real Engineering content! :D
Thanks Inés!
@@RealEngineering THE UNIVERSAL, SIMPLE, CLEAR, AND TOP DOWN MATHEMATICAL PROOF THAT E=MC2 IS F=MA (ON BALANCE):
It is a very great truth that THE SELF represents, FORMS, and experiences a COMPREHENSIVE approximation of experience in general by combining conscious and unconscious experience.
TIME dilation ULTIMATELY proves ON BALANCE that ELECTROMAGNETISM/energy is gravity, AS E=MC2 IS F=ma. INDEED, TIME is NECESSARILY possible/potential AND actual IN BALANCE; AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity.
E=MC2 IS F=ma. This NECESSARILY represents, INVOLVES, AND DESCRIBES what is possible/potential AND actual IN BALANCE, AS ELECTROMAGNETISM/energy is gravity. Gravity IS ELECTROMAGNETISM/energy.
Energy has/involves GRAVITY, AND ENERGY has/involves inertia/INERTIAL RESISTANCE. "Mass"/ENERGY involves BALANCED inertia/INERTIAL RESISTANCE consistent with/as what is BALANCED electromagnetic/gravitational force/ENERGY, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. GRAVITATIONAL force/ENERGY IS proportional to (or BALANCED with/as) inertia/INERTIAL RESISTANCE, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity.
NOW, carefully consider what is THE MAN who is standing on what is THE EARTH/ground. Touch AND feeling BLEND, AS ELECTROMAGNETISM/energy is gravity; AS gravity/acceleration involves BALANCED inertia/INERTIAL RESISTANCE; AS E=MC2 IS F=ma. Very carefully consider what is BALANCED BODILY/VISUAL EXPERIENCE. (LOOK up at what is the blue sky, AS THE EARTH is ALSO BLUE.) Gravity AND ELECTROMAGNETISM/energy are linked AND BALANCED opposites, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. The stars AND PLANETS are POINTS in the night sky. Great. It ALL CLEARLY makes perfect sense, AS BALANCE AND completeness go hand in hand. E=MC2 IS CLEARLY F=ma ON BALANCE. Objects AND MEN fall at the SAME RATE (neglecting air resistance, of course), AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. The rotation of WHAT IS THE MOON matches it's revolution, AS E=MC2 IS F=ma; AS ELECTROMAGNETISM/energy is gravity. Gravity IS ELECTROMAGNETISM/energy. Consider what is THE EYE. So, LOOK at what is the fully illuminated (and setting) Moon AND the orange Sun ON BALANCE. Now, think about what is LAVA. E=MC2 IS F=ma. SO, we then multiply ONE HALF times one half in order to determine the size of the Moon. (It IS about one fourth the size of the Earth.) This is CONSISTENT with the fact that the Moon IS (on balance) LAND. Therefore, the density of THE SUN is (ON BALANCE) about ONE FOURTH of that of what is THE EARTH; AS E=MC2 IS then CLEARLY proven to be F=ma; AS ELECTROMAGNETISM/energy is gravity. Very importantly, outer "space" involves full inertia; AND it is fully invisible AND black. Again, it all CLEARLY makes perfect sense ON BALANCE !!!
The BULK DENSITY of the Moon is comparable to that of (volcanic) basaltic LAVAS on the Earth. The energy density of LAVA IS about THREE TIMES that of water. SO, now, get a good and CLEAR LOOK at what is the ORANGE SUN !!! We WOULD then multiply ONE THIRD times one half in order to obtain the surface gravity that is experienced by the man on the Moon. (It IS one sixth of that of the man who is on the Earth.) The maria ("lunar seas") on the Moon do take up ONE THIRD of what is the near side of the Moon. Excellent. The Moon is ALSO BLUE on balance. Great !!! Now, in conclusion, the land surface area of THE EARTH is 29 PERCENT; AND this is EXACTLY ON BALANCE WITH BOTH one third AND one fourth; AS ELECTROMAGNETISM/energy is gravity; AS E=MC2 IS CLEARLY AND NECESSARILY F=ma !!!!! GOT IT !!! GREAT.
E=MC2 IS CLEARLY F=ma ON BALANCE. ELECTROMAGNETISM/energy is CLEARLY proven to be gravity ON BALANCE. Gravity IS ELECTROMAGNETISM/energy. It must be, and it is.
By Frank DiMeglio
Is this the right video Elon ??
My first 3 weeks of material engineering class in 6ish minutes. Such nice work. Thank you.
I get the desire to keep the high production videos separate to these (this video was great, by the way) but to be blunt, and not write a few paragraphs of my opinion/reasoning, I'm not sure your channel is large enough yet to already consider splitting up content on a different channel. Even huge RUclipsrs lose views on secondary channels.
I understand the potential partnership w/ a university may call for it, but if it ends up being just a personal choice, my vote it to keep them here and maybe just label these types of videos differently (maybe a short [tag] in title or a slightly different thumbnail theme).
Obviously, at the end of the day, you know your situation best. Good luck with getting that partnership, I know everyone who likes your main content will gladly watch proper college grade videos.
As someone who is also stuck on what to do with separate series on a channel, I find these comments very insightful. :) I am very sure +Real Engineering can pull it off either way (and especially if he can partner with a Uni, I think a separate sponsored channel is definitely the way to go) - but I'm sure an informative title tag would work too
Yeah I wouldn’t want to be bothered to be checking two channels tbh
I didn't have a good professor for my Strength of Materials class, and this 6 min video taught me more than his class did in 4 months. More videos on the concepts for material properties would be amazing! Specifically Mohr's Circle and its uses.
As a mechanical engineer, I find that your videos are excellently presented. They cater to those without much background in the subject while not insulting the viewer's intelligence. Well done. It would be great to see your videos in classrooms.
I retired a few years ago as a physical metallurgist. This video is well made. Thank you. "Youngs Modulus", brought back a lot of memories.
As an Mech/aerospace guy I can def say a lotta material scientists/metallurgists really like playin around in the lab haha this is what I observed when I was taking my mechanics of materials course lab they were putting all sorts of stuff in the utm needless to say the lab tech was mad😂
I love how much you have grown. Been here since the early days. just one thing. Your mic can be better :)
This video was recorded between Ireland and Dubai. Audio quality is all over the place. May invest in a nicer mic soon, but the blue snowball is nice.
From what I've heard the blue snowball sounds better so it could be in the settings? Nevertheless I was nitpicking.
Elon musk sent me here.
Me too. Gonna study materials science
Yes please! I'll be taking mechatronic engineering in the coming years and all I get for any RUclips educational videos are repeated "these are the basics of what it is, now join our university!". I know what it is but is like to educate myself beforehand lol. You seem like you took mechanical and/or aerospace engineering but still it helps since mechatronic covers such a huge range. Hell maybe you can check out other engineering branches like bioengineering some time.
I really like the content here. Maybe now RUclips will see a growth on proper engineering videos like it did with physics videos. Maybe how another person to help make more videos?
Joshua W im starting electrical and mechanical this year :)
it is NOT true that less force is needed after ULT point. in fact, more force is needed to deform it. This can be seen using the equation of true stress ( F/ instantaneous area) instead of engineering stress ( F/ initial area)
definitely you are right....but the thing you are talking about we called it true stress...
and generally in engineering we deals with engineering stress (we take are as constant)..
The side scrolling text in the beginning of the video. This is why we need at least 60 fps video. Otherwise it is a slideshow.
Where are the video's on your second channel?
It would be nice if you used an actual graph compared to just an example, for statistical and accuracy reasons.
I REALLY liked the video, but it left me wanting even more! About how exactly can materials be tailored to fit specific criteria of hardness, ductility, etc. I didn't even imagine that about a katana, or any sword for that matter. Great video!
I'll be covering steel and it's ability to be hardened in detail soon.
Real Engineering great!
I'd like to see that, I'm making some mixing blades from steel rod and could use some insight fine tuning them. Soon?
The fact about the ships and Katana construction were super interesting! I love the real world examples in conjunction with the facts - thank you!
An excellent tutorial
I wish there were more like this. (edit one of the best I've seen in 10+ years on yt)
Subbed/liked no hesitation.
Pretty good video! I like it! If only you'd uploaded this before my exam in material science!
I remember watching this in my first semester of sophomore year in high school knowing it would be relevant to my future schooling and now I’m a junior material science engineer and have to perform tests and make stress strain curves from load and extensometer data
I am just a guy who likes to spend his free time on RUclips, dicking around watching videos over space exploration and a few outlandish scientific concepts. I already have a hard time figuring out what to do with my life, and I'm currently doing an exchange year in Germany wondering what to study in college(or even study straight away at all ).
Finding your videos in my reccommeded list has really sparked an intrest for me in material science, a branch of science I've never really bothered to think to much about before, yet also made it clear to me that I would live to study some form of physics. It's so hard to be in a classroom thinking about when the subject material will be relevant, or staring at marvels of the world without understanding what intellectual work went into it (let alone understanding the work in the first place). So, thank you. And please, after watching your latest video on the power grid, keep up the good work
I like that there is absolutely no content on his second channel, but already has almost 4k subscribers.. Including me.
Haha sorry, ideally there would be a video there. I'm only one man, difficult to get it all done. Hoping to hire a part time animator for the second channel.
Translate to the Arabic language please please
Mülakatı alan basın uzmanı beyi tebrik ederim. Çok başarılı bir söyleşi olmuş, kaliteli sorular ile iyi yön vermiş. Ismi nedir acaba?
As a Metrologist who works with all of this every day, I just had to watch it. You did a great job
I thought I was procrastination but these videos will actually help with my materials exam next week.
Very nice content..!! But pls...pls..speak slower..!! Have something in hand to drink ...to make you slower..!! BUT DEFINITELY VERY GOOD VIDEO..!!
god i fucking love your accent
This video is a fantastic overview of the terms used in material design. Thanks :)
Such a strange coincidence that this is the new video. Classes are going over them ATM
This was really helpful for my material science class. Would still really love to see more videos like this one day.
This video is a treat to the eyes of a civil or mechanical engineer. Thank you so much.
So hardness is to compression as stiffness is to expansion?
erm, not exactly. Yes, hardness is tested by using local compression, as shown in the video. Yes, hardness is essentially the ability of the material to resist dents and scratches which are typically caused by compression forces applied to the material "from outside" (which is an important distinction, but can otherwise be ignored in this discussion). No, stiffness is not specific to expansion. It relates to all stresses which may exist "within the material", including tension, compression and shear, which further include bending and torsion. Material stiffness is most readily defined by Young's Modulus (E), which relates how much the material will deform under stress. Take a steel wire and a rubber band of the same size. Apply the same tension force to each. The wire will barely stretch (imperceptibly), whereas the rubber band will stretch a lot. The wire is much stiffer. Take a rock and a marshmallow (same size) and apply the same compression force the each. The rock is much stiffer. Not-quite-coincidentally, the steel wire and the rock are also harder than the rubber band and the marshmallow. Not-so-coincidentally, the wire and rock are also stronger. Stiffness, strength, and hardness are related, but hardness is more of an empirical property, whereas stiffness and strength are more of an engineering property. I hope I am not too confusing. Let me know if you have any questions.
I'm guessing you're going to get a huge surge of subscribers from the MinutePhysics collaboration.
Hi, I'm one of them. I watched a handful of your videos to make sure I'd be interested (hence this comment being on this video, not the collab one), they were all great. Looking forward to more, keep up the good work, all that kind of stuff.
Thanks bud!
Chinese like material-technology.
Some things-parts-modules are meant to be
= strong, weak, flexible, soft-angular hard-edge-perpendicular, push-pull, indicative-squeeky when near limits, damaged(cheap repair-replacement) when near limits of other parts-materials, break-away, dented, rotated away upon impact beyond structural-design, mangled(controlled disposal size) when suffered unreasonable abuse, ... ...
Usual instruction-manual is the common-materials employed as indicators of maximum stress-usage patterns (not price-tag)
sit(stresses) outwards until near limits then will flex-collapse inwards (hinges and joints preloaded-biases) being an example.
*At the end of a stressful day, my mechanics always takes the edge off*
Yield Strength/ Safety Factor = Allowable Load for Ductile Material, Ultimate Strength/Safety Factor = Allowable Loads for Brittle material
Hrm went to look for your second channel. Looks like that didn't exactly pan out for you, huh? That's too bad, it sounded like it had a lot of potential. Same for revisiting the topic of material properties and material science. I know you touch on it once in a while, but I can't recall any specific videos you've made about such subjects in quite some time. (wink wink nudge nudge) =P
You should clarify that the proper way to measure Young's Modulus is by V^2*d=E (with v, velocity of sound in the material, d the density and E, Young's Modulus), because, although it gives us an approximate value, it's not the real.
On the other hand, when you talk about tenacity, is the surface below the curve, but excluding the elastic energy (that recovers): so, it should be the total area minus the area below the line (with the slope E).
Pretty good video, though. +1
Tensile test:
stress-strain curve
yield strength - elastic deformation
ultimate strength - plastic deformation, necking
Young's modulus/ elastic modulus (how stiff the material is)
safety factor
stiff (high carbon steel)
flexible (rubber band)
tough (the material absorb a lot of energy without breaking)
ductile (deform under pressure)
brittle (glass, ceramics, cast iron, the material break with very little deformation)
hardness (is a measure of how resistant solid matter is to various kinds of permanent shape change when a compressive force is applied, directly related to the stiffness and yield strength of the material, rockwell hardness test)
This video was linked in my Aircraft material PDF file, from my school! I guess congrats!
I know this is a rare ask, and coop videos aren’t your thing, BUT….
I have a theory, based on past videos of yours… that @kentuckyballistics is wrong about the hot load in his gun. Video for reference: ruclips.net/video/1449kJKxlMQ/видео.html
I don’t think it was solely an “extremely hot load” in the round he fired, that sheared off 4 threads on the cap… that it was repeated stresses that caused the threads to fail at a much lower force than is tested, due to the repeated use…
Is there anyway you can analyze and confirm?
I’m not smart enough to know the science… I’m just crossing streams and hoping my theory is wrong.
Because if so… and I’m not saying it IS so…. But, if so… the gunsmith needs to recall, rework and reengineer his materials science to prevent this catastrophic failure from happening in the future.
Please, and thank you for the consideration.
✋, just a question, is the tensile strength of wires multiplicative? that is if a steel wire yields after x Newtons of forze, and you use 2 or 3 wires, would you need 2*x and 3*x newtons for the same effect??
Hello,
I am a mechanical engineering student and i think your work is exellent. If you dont mind i would like to suggest you a topic for your buket list through this problem I came across. Why is it that aluminum, that is a very ductile material due to its crystal structure, would behave like a brittle material in a tensile test? My TA could not explain why.
Thank you, Real Engineering.
Quizzes and analytical questions on mechanical drawings, shop floor drawings, also production process machining steps etc through your channel
Alok Kumar
Section engineer in indian railway
I got a 4 year degree in engineering for $10,000, and that was only because I took out loans so I didn't have to work while going to college. Now I've got a good job lined up, so it's hyperbole to say that college in the Us is prohibitively expensive.
very informative. but could you please speak little slower in the next video. Thanks.
Is A356 aluminium alloy good to use in changing magnetic field?
I wanted to use a lightweight yet non magnetic material for my project.
Do you have a prediction for how much funding is needed for a really robust material science research program nationally/internationally? How far off are we currently? Thanks, love your videos!
To be perfectly honest, in my humble opinion, of course without offending anyone who thinks differently from my point of view, but also looking into this matter in a different perspective and without being condemning of one views and trying to make it objectified, and by considering each and everyone’s valid opinion, I honestly believe that..I completely forgot what I was about to say.
1:55 you have the graph wrong. You are missing here the point of slide( sorry for poor translation, i take it literally from czech language), and there the graph rises, then goes down and then finally up again. We learned that on our highschool in subjects of technology and mechanics. ...
I could have used this for my Biomaterials unit for BMEN 1208.
This is going to be an AWESOME channel!!!! (current Mech.e student)
Hello RE,
from what I can see I would guess you come from mechanical engineering right? Your focus on metal based materials makes me believe that this is the case.
I'm happy to see somebody promoting engineering topics and knowledge to the world but as a material science engineer I feel obligated to point out that this a very simplified and basic look at the topic and that is okay but you should point out that this is the case. People do tend to believe they know all kind of things after watching two or three 10 minute vids on the YT.
Actually, how about a video about that sword thing. I'm not really clear how a hard edge on a sword with a ductile core can absorb much of the energy of a blow meaningfully without that hard edge fracturing.
Thanks, sir but I didn’t understand how mild materials happened deformation...
you get an average of 19,693.26 subscribers per video.
why is everyone in the freaking need of a second channel? this guy is uplaoding rather rarely (but with high quality, i know) and now he is effectivly doubling this timeframe by splitting the content up in 2 channels. i dont get it.
It almost sounds like you're not having fun talking about it. A bit too fast for me, I remember learning about metal properties years and years ago in school and the way it was taught to me was so unfun that even though the concept is amazing it just put me off engineering. I mean, I am an engineer now but, I'm lacking in material properties knowledge.
Can you explain what 30x cold rolled steel means that tesla use for making cybertruck?
Like the vid, but I'd prefer if you spoke just a *little* slower. From the point of view of an 'older fart'. :)
While the things you said at the end there are right, you should not use a Katana for an example, a european Sword would be more adequate in this situation.
The Steel used for a traditinonal Katana is quiet brittle if compared to, say a medival Longsword.
"Katana-Steel" has many inpurities in it. That is because the Oven (Whose name i forgott, i have to admit that) cant reach the temperature to "cook" them out, they are instead spread out in the material to even it out.
Is it accurate to say that the stress-strain graph is 3-dimensional, with time as the Z-axis? I didn't understand the plot at first since there are multiple x values for a given y value. Might still be a function, but didn't make sense in the context of a test until I thought about it ito of applying and removing the stress over time. I think people need to be explicit about time as a factor when explaining this chart.
i think it's better if you upload all your content on your first channel as i think the videos will be more watched and therefor you can get more money, which would help your channel grow with better content and then cover your living ;D
6min is not enough... To expalin hardness toughness brittle ductile..
Well to be fair, that iPhone wasn't pushed past it ultimate strength, just its yield strength. This doesn't even appear in that formula you gave.
If stress is defined as the force divided by the cross-sectional area, and the area decreases during "necking", then wouldn't the value of the stress increase since you're dividing the force by a smaller and smaller number? Or is the force not a constant value?
結論(conclusion)
剛度(Stiffness):應力與形變在彈性限度內[或屈服點(Yeild point)]的關係，
當我們描述一個剛硬(Stiff)的材料時，表示材料在同樣的受壓狀況時形變較小，反之，則是可撓性/柔性(Flexible)材料
堅韌(tough)的材料能夠接受較多的能量而不斷裂(Fracture)
具延展性(Ductile)表示物體會且能夠在受壓之下形變，這材料可以是剛硬(Stiff)也可是可撓性/柔性(Flexible)的
而脆性材料(Brittle)則是具延展性(Ductile)的相反，在小小的形變之後就會斷裂(Fracture)
硬度(Hardness)在本影片中所展示的是壓入硬度/壓痕硬度(Indentation hardness)
Did you give up on the idea of the 2nd channel? I was really stoked, but nothing seems to happen..?
Shouldn't the yield point also cover some curve as well ... It is written in my course book ...
in which accent is he speaking.....?
his pronounciation of 'hardness' sounds strange....
I thought the Titanic hit an iceberg at just under top speed and was able to stay afloat for 2 hours, that doesn't sound like a failure that sounds like a win. It should have sunk straight away if the steel was brittle the damage would've been more extensive
Im here because of elon musk
hey ..u have great ability of understanding but...the concept you are talking about is somehow wrong (2:03)...as stress is internal resistance...due to decrease in area it got increased if we apply the same force or increased it...the main reason for decrease is that we don't use the original area.....
I think you have to read about true stress and engineering stress..
Although mainly in engineering we solve many problems via engineering stress ....but if we use true stress then the graph increases ,not bent to down...
Went to the second channel, but the last upload was 3 years ago 😢
Edit: I read the pinned comment and I understand why he doesn't upload anymore but i always feel sad when a channel has a long hiatus or needs to be abandoned by it's owner..
Recently passed material science in first year. Just need to pass the exam then I’m 2/8ths an engineer. :D
How to get low UTS and high hardness in brass annealing..which type annealing gives the result?
I think.when you were talking about the tensile test it would have been.worth mentioning the difference between "engineering stress" and "true stress", but otherwise it's great :)
Bless me guys, I’m going to learn material science next day for the very first time😭