Condition on the components of the stress tensor from considering the equilibrium equations; i.e. sum the forces and moments - except at each point! Lectures created for Mechanics of Solids and Structures course at Olin College.
Пікірлер: 9
@fabi0bmx2 жыл бұрын
Nice tutorial! Very helpful. The only thing I didn't understand is why you consider dx and dy as areas and not lengths.. You say in 5:54 that dy is the area. But at the beginning you said they correspond to width and height. The same for momemtum. This won't change the final equilibrium equations anyway if you get the correct units.
@AwestrikeFearofGods2 ай бұрын
14:05 The bottom-right tensor entry appears to be mislabeled (is: Tyx, s/b: Tyy). Good lectures.
@mr.e47064 жыл бұрын
THANK YOU!! really saving my life by remembering me all these concepts and explaining them really easily btw just to be sure... in the last paper you showed, there should be a T_yy in the matrix on the bottom right corner, correct?
@asam15842 жыл бұрын
yes
@thejakartajasmine56132 жыл бұрын
I think so, it should be a T_yy in 14:05
@jaxcgerard3 жыл бұрын
Thank u for this. Appreciate them very much but just wondering why is it dx/2 ?
@hugobadillo27993 жыл бұрын
because it is the center of the cube
@thejakartajasmine56132 жыл бұрын
I think it uses the Taylor series approximation, f(x)=f(c)+f'(c)(x-c)+.... where x=dx (the right-hand side of the square) and c=dx/2 (the center of the square) so, x-c = dx-dx/2 = dx/2 CMIIW
@yirong54072 жыл бұрын
I believe it does not matter. If you use dx instead of dx/2, the same conclusion will be drawn as 2dxdy will be eliminated at the end.