FEA mistakes I've made, and how to avoid them!
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- Опубликовано: 22 авг 2024
- You don't have to make all the same MISTAKES I did in FEA... just watch this :)
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Learn more about different FEA mistakes and how to avoid them in my related Blog Posts:
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In Mechanical Engineering, specialty in dynamics, a bolt without pre load is unthinkable. Talking about shear loads in bolts are not common either, they are supposed to make other parts transfer the load by friction.
Very nice video, keep up with the good work
Thank you for the kind words. Well, in civil engineering non preloaded bolts would be a standard application. But of course, this depends on what you do etc. It's lovely how things are complex and how they differ from "field" to "field" isn't it. I simply love the complexity of engineering - this simply makes it so much fun to do!
Your intellectual honesty is a virtue. Thank for your videos! I am indentify with it and inspire me more and more to learn learn and learn!
Thank you Rodrigo! You are very kind :)
Thank you so much for the post. It is going to help many engineers.
One suggestion to use screen pointer to indicate the exact location that you are referring to during your explanations.
Thanks for the suggestion Mate! I will see what I can do :)
Hi Lukasz (please forgive the spelling)
Would you consider interviewing your father? so interesting that you both have PhD in structural, and curious about all the implications and shared experiences.
Love your videos, and they are worth watching again every so often. So articulate and entertaining.
Would be a special episode :)
Hey Nicolas!
Ach of course I thought about it many times now... I'm not sure though if my father would be interested, and most likely we would have to talk in polish, which is a completely different problem in general. But thank you for writing it - I will tell my dad - I'm sure he will smile in disbelief that someone was interested in that :)
Also, thank you for your kind words, I really appreciate them :)
@@Enterfea Hm, the polish is a good point. Even with auto subtitles it would be great! But good to know you've considered it. Totally expected that he might not be interested in a RUclips (at least it's not TikTok!). Thank you for your reply.
Looking forward to the livestream next week. See you then!
@@nicolasramirez3944 See you on Tuesday Bud. Yea, it's a matter of subtitles really, I'm still thinking about it, so you know - maybe it will happen one day. It would definitely be cool - that is something I'm certain of :)
Hi, I just found your channel. Super interesting stuff! I was previously a research engineer at my university and have now been working for a year as a structural engineer at a major manufacturer of telescopic container spreaders. It's nice to see someone with a lot of experience talk about their experiences in the field. Will definitely take a look at the rest of your videos! 👍
Thank you so much @jakburk! I'm really happy that you like my work :)
All the best!
Amazing. Been looking around for FEA learning material that wasn't: A) using the specific software (NASTRAN), or B) just talking about matrices.
Going to be doing your courses and sure I'll be a better engineer for it!
Hey Stuart! Thank you for your kind words, I'm really happy that you find my work useful!
All the best!
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love your sincerity and the way you teaching these important concepts is amazing.. doesn't bored me at all....
Appreciate your work bro... keep it up... 👍
Thank you Parkash - I'm happy that you like the video :)
@@Enterfea is the course free.. or just the 1st page.. i am interested in that one but didn't have money.. 😑🥺
@@parkashsingh9044 Hey! The 10x FEA course that I talk about in the video is 100% free (you can sign up here: enterfea.com/10xfea/ ). I also have a big, paid course about FEA too (you can see it here: enterfea.com/learning-fea/ ), but it's a completely different thing. You can of course sign up for the free course and never buy anything at all.
If you will have trouble signing up - let me know :)
@@Enterfea really happy to hear this......
but thanks sir... i read the first module but how can i move to next... are you sending me on my mail ?? or i have to access it by my own.... login already..
@@parkashsingh9044 You will get a module each day by email, but also each lesson ends with a signpost drawing that will automatically take you to the next lesson... as will the map in the menu on the right.
All the best!
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Niestety nie mogłem obejrzeć całego odcinka na żywo, ale przynajmniej mogę teraz dokończyć! :)
Pozdrawiam!
Fajne jest to że to "zostaje" więc można sobie później oglądnąć. Cieszę się że wracasz... bo jest szansa że się podobało :)
Pozdrawiam serdecznie
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Like this video. I have seen similar mistakes in my early work
Thanks Russel! Yea... we all made mistakes, but somehow we do not talk about that enough, so others cannot learn from them... I think there should be a "engineering mistakes" class at university - that would be something!
Such a legend. Thanks. :)
Thank you Dan! You are very kind :)
Thank you for shearing such interesting experiences in FEA. Note that subscription in your free online course results into the following error "Due to an internal error, this web page could not be loaded" after click in "Yes, I want FEA stuff!!!".
Hey @Juan First fo all thank you for your kind words, I'm glad that you find my work interesting.
As for the course error - jikes! I have no idea why this error shows at your PC (so far you are the only person with this issue, so for now I hope it is local...). Please send me an email and we will work this out I'm sure :)
All the best!
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thank you!!!
You are most welcome Margarita!
Thank you for your video. Very useful as always.
Just one remark, sometimes I can't get your points. It's quite difficult to understand for me. So Could you pls add some explanation on your figures or interact more with them for example by showing your pointer...
Hey Trung! First of all, thank you for the suggestion! I'm completely new to live stream, and honestly, for now, it's already a bit too much going on for me. But, I will try to make the slides a bit easier to follow next time - we will see where it will go :)
Also, thank you for your kind words :)
Thank you
You're welcome :)
16:00 W czym ostatecznie tkwi problem? W tym, że ktoś zastosował sloty w połączeniach śrubowych zamiast otworów (albo otwó+slot)?
Nie do końca... problemem jest to, że połączenia śrubowe (szczególnie takie ze slotami, ale takie ze "zwykłymi otworami" też (o ile nie sa sprężane) po prostu mają "poślizg" czyli muszą się "ruszyć" by zacząć przenosić siły jakie zaznaczyłem na schemacie. I ten ruch, może wydawać się mały (np. 1-2mm) ale to wcale nie jest mało i może mieć bardzo poważne konsekwencje - co pokazuje ten przykład :)
pozdr!
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@@Enterfea Dzięki :) parę miesięcy temu właśnie spotkałem się w swojej konstrukcji z tym tematem i szukałem po publikacjach odpowiedzi na pytanie w jaki sposób obliczyć siłę sprężania grupy połączeń aby nie dopuścić do poślizgu :) Może to po prostu zbędne, coś znalazłem ale jeszcze całości nie przeanalizowałem. Miłego.
@@eartheartbaratheon791 To chyba nie jest aż tak trudny temat - śruby sprężające mają swoją nośność na "poślizg" którą da się policzyć zgodnie z EC - rozkład sił w śrubach będzie dość prosty (sprężysty, no i to ścinanie więc w najgorszym razie mimośrody robią skręcanie) no i da się określić czy sruby mają wystarczającą nośność na poślizg czy nie. Przynajmniej w tą stronę bym w to szedł. No i ratro pamiętać że nośność na poślizg jest dużo mniejsza niż na ścinanie :)
Hi Lukas. I have to design a pipeline. In the First kickoff meeting..i Remember this video. And i go to rewatch. In my First idea i Will model the pipe and the rigid support for the offset from the slab.
Well...mistake. how ti fix this?
Well... assess the actual rigidity of the support, and use it instead - that would of course solve the problem. Also, you may wonder if you should include the slab stiffness itself (if the support is very rigid, but in a center of a huge slab, the slab rigidity will play a role as well I would say).
On a side note - I'm glad that my video helps you in the actual work :)
Good luck!
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@@Enterfea ok i think to create a local model of the support, meshing all the plate, appling the winkler at the base nodes (we have not a slab, we have kind of isolate rafter foundation on pile, i have already model geotecnical stuff in a side model). if i apply 1N at the top of the local model, and i read the displacement in mm, i can calibrate the rigidity of the sistem. i can use this in the global model of the pipe. correct me if i'm saying bullshit.
sidenote reply. you're inspirational model for me, and i think for many other engineer. i wrote the question in this comment section and not in a direct private e-mail, to keep track of the answer, in case someone else needs it in the future
@@peeolo Thank you for the kind words :)
Yea, the idea you have is right. The only thing I would add is, that the support can have BOTH translational rigidity and rotational rigidity. So when you add a 1N load in horizontal direction (mind that 1N is very little, I would go with 100kN or something, depending on the support capacity) the displacement of the node where you apply the load (preferably in pipe axis) will be the rigidity of the support in the direction of the force (of course you read the deformation on the direction of the applied force, and rigidity is force divided by deformation). But you could also apply a moment, and then measure the rotation of the node - dividing one by the other would give you rotational rigidity - both would be decent to use if you have a big pipe :)
@@Enterfea thnks for all. i'd love to see your model of pipeline. even only few snapshot. i'm courios now
@@peeolo sadly, we can't share most of our work (NDA and stuff) but to be honest this pipeline was like a decade ago... I'm not even sure if we have those models anymore... probably somewhere in the external archives...