Menu

Discussion Forum

New Discussion
Filter

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.

Mismatch about strain-stress and Young's modulus

Posted May 24, 2020, 11:35 a.m. EDT Structural & Acoustics, Structural Mechanics Version 5.5 1 Reply

涵 徐
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi everyone!

I am doing structural analysis and I got a problem about the stress and strain. For a simple solid cube, the input Young's modulus is 2.8GPa while the obtained ratio of stress and strain is 3.2GPa. The stress is integration of tensor of the loading surface; the strain is ratio of the displacement and original length.

Is my extraction about stress and strain wrong or any missing about the model ?

Thanks in advance.

1 Reply Last Post May 25, 2020, 3:37 p.m. EDT
Henrik Sönnerlind COMSOL Employee

Please login with a confirmed email address before reporting spam

Posted: 5 years ago May 25, 2020, 3:37 p.m. EDT

Is the stress state truly uniaxial?

Is geometric nonlinearity involved? If so, you must be careful about which stress measure and integration area you used.

-------------------
Henrik Sönnerlind
COMSOL
Is the stress state truly uniaxial? Is geometric nonlinearity involved? If so, you must be careful about which stress measure and integration area you used.

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.

Suggested Content