Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Thermal Expansion Shear Stress Evaluation Interpretation

Please login with a confirmed email address before reporting spam

Hello! I am doing a simulation of stresses in multilayer material blocks due to thermal expansion. The pictures attached show the deformation and temperature distribution of the model, and the plane of evaluation (a horizontal plane in xy-plane). In the 2nd picture, green represents BiTe, orange represents copper and grey represents ceramics. 300°C of Heat is supplied from above, below it is 20°C. I have evaluated solid.sxz, solid.sxy and solid.syz. The results are: solid.sxz = 1,77E08 N/m2 solid.sxy=1,9E08 N/m2
solid.syz=1,77E08 N/m2 While solid.sxz and solid.syz would in case of a horizontal plane give the value for the stress tensor component tau zx and tau zy, shouldn't solid.sxy result in 0? The normal vector would be x, so the plane in question is the yz plane, but the plane of evaluation is in the xy plane, so there is no height in this plane. Or if the calculation is done in a point in this plane, why would there be a stress in y-direction on the yz-plane and why is it bigger than the two shear stress components?

Thanks in Advance and best regards, Peter



0 Replies Last Post 20 mars 2021, 06:42 UTC−4
COMSOL Moderator

Hello Peter Zellinger

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.