Concept Introduction: Use Mohr’s circle to transform stress and find principal normal stresses and maximum in-plane shear stresses Calculate absolute maximum shear stress
Lovely Explanation. One Question: @9:48 Shouldn't Sigma_1 be equal to 25 and Sigma_2 be equal to 50? Sigma_1 is the Principal Stress on X Face, which is given as 25. As I see it, if Sigma_Y > Sigma_X then the circle gets horizontally flipped compared to the initial circle you explained, doesn't this alter the way the readings are taken?
You have a good point. However, by definition, Sigma_1 is always the most positive of the principal stresses (always on the right side of Mohr's circle) and Sigma_2 is always the least positive of the principal stresses (always on the left side of Mohr's circle).
How to derive stress transformation formulae using Mohr's circle? I mean how to geometrically interpret the stress transformation equations from the Mohr's circle
So I tried plotting my circles using the planes as you did but I have a shear stress to consider and my circles ended up overlapping each other which I don’t think they’re supposed to do. Is there another way to plot it? SigX = 100 SigY = 40 SigZ = -60 TauXY = 30 TauYZ=TauXZ=0
You have 3D stress state, which is a little more complicated than what I discuss in this video (plane or 2D stress). Here is a link you could try: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-GNp0JA4O-fg.html
You have the option to plot tau positive down or positive up. If you plot tau positive down, then angle directions on Mohr's circle match reality (clockwise angles on Mohr's circle = clockwise angles in reality). If you plot tau positive up, then angle directions on Mohr's circle are the opposite of reality (clockwise angles on Mohr's circle = counter-clockwise angles in reality).
And I can see plenty of compressive stress. It's between sigma2 principal stress and 0. One just needs to "cut through" the element (or the point, to be precise) with a line (2D case, plane stress) in a certain way. Don't try to understand lesson 2 before you understood lesson 1. I can't see "stress element" you mentioned . I can see an element (or rather a point) under stress, though.
What about making a proper "vedio" yourself? We have a name in Poland for people like you. It translates into Inglish as "ungrateful bustard", or somethin' like dat. No regards
