Mohr's Strain Circle construction
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- Опубликовано: 13 дек 2024
- Construction method for Mohr's Strain circle. Showing calculation of max stresses and stress at a given angle. Part of the course notes for the Diploma of Engineering. S Tomsett. CPIT, Christchurch, New Zealand
My lecturer diddled around with this over 3 lectures. you nailed it in 11 minutes, thank you!
Same
What a noob
Hope you are doing well in your life 😊
I watched you stress circle last semester and your strain this semester, very well explained! thank you very much for these.
Thank you! Great video
You can use any length as long as you use the same length from each end of the line. Steve
You saved my life!
This method works from the edge of the circle. There is another method that draws the lines from the center of the circle and requires the angles to be doubled. Hope this helps. Steve.
it's really excellent lectures thanks doctors
HI Steve,
how do I draw this for a 120° rosette?
Hi there James, it works the same way with any other rosettes. You align your rosette in the same way and extend lines out for the rest.
For example in a delta rosette. You pick the middle strain, which will in this case be our strain c, i.e. the middle value. and depending on what that rosette is angled at, i.e. let us say that it is angled at 120 degrees. We then put our protractor on and draw a level line out i.e. 0 degrees. and then 60 degrees (which will be our strain b) and then another another 60 degrees, strain a for a total of 120 degrees.
You then follow the same procedures and extend the lines out until they intersect with their corresponding strain value and from there draw the bisectors etc (follow video).
We are adjusting the angle the way it is (as mentioned above) so that the strain rosettes are respectively angled as they are in the real world (either that be delta or any other angled rosettes).
thanks sir for providing such usefull stuff..
Rectangular gauges are just another name for a 45° Gauge element. The angle of the gauge does not change the process of drawing Mohr's cicle. Steve
Hi, is there a set strain the gauge should be placed on? I placed on strain A and my circle is not working out correctly.
Hello. Thanks for the video and I got a question. When you bicept using ur compass on 3:37 How did you measure how long the radius would be? Does it have to be specific ?
Did you just pick the length randomly ? Looking forward hearing from you soon thx.
This question covers 20marks out of 100 marks in our university exams😮...thanks for the explanation.
Hi Steve, how did you get the angle 37 degrees on the mohr circle and on the specimen? Im not normally good at the mohr circle, we got taught that the angle is doubled from the specimen to the mohr circle
mate you are amzing .thanks you so much
Hi, I hope youre still able to help. I may have missed it but is it possible to determine the maximum shear strain from this, if so how?
Thanks
Dave
is the 37 degrees the angle to the principal strain max? is that different from the angle to the max shear strain?
Do you know what the difference between doing it with a 45 degrees strain gauge rosetta and a rectangular strain gauge rosetta is?
Steve aren’t you assuming plane stress with that relationship for stress and strain?
How do you solve a 60 degree strain gauge rosette?
brilliant, thank you so much
Any length.
What is stress@10?? What does it mean why is it needed?
+Salim R It is, another angle. Its a example for same kind of problem.
How about 60 degree?
greate
Thxs. I just realised I forgot what is a bisector. Wow!
The video a bit too Blurr. Mind doing another HD quality one?