Menu

Discussion Forum

New Discussion
Filter

Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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.

restricted stress in time dependent problem

Posted Mar 31, 2013, 8:26 a.m. EDT Heat Transfer & Phase Change, Structural Mechanics Version 4.3 3 Replies

Kanhaiya Singh
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hello evrybody,

I m using a time dependent problem of a beam restricted at both ends. When we apply voltage or temperature, it produces stress greater than 500 MPa. Can anyone help me how to restricted stress upto 500 MPa for each iteration.

Thank you.
3 Replies Last Post Apr 2, 2013, 1:10 a.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Mar 31, 2013, 1:20 p.m. EDT
Hi

how do you want to restrict the stress ? you can use a parameteric sweep and increase the temperature in steps, and then stop, or you define the temperarture as a global variable and you get COMSOL to otimise its value such that the stress is some 500MPa. But you need to define which stress and where, and usin min maxoperators during solving is very costly (there is a model library example of thermal T control to reach a given temperature at a given point in a model

--
Good luck
Ivar
Hi how do you want to restrict the stress ? you can use a parameteric sweep and increase the temperature in steps, and then stop, or you define the temperarture as a global variable and you get COMSOL to otimise its value such that the stress is some 500MPa. But you need to define which stress and where, and usin min maxoperators during solving is very costly (there is a model library example of thermal T control to reach a given temperature at a given point in a model -- Good luck Ivar
Kanhaiya Singh
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Apr 1, 2013, 7:48 a.m. EDT
Sir
Can you suggested path of model library example of thermal T control to reach a given temperature at a given point in a model. and also for above suggested example by you.

Thank you
Sir Can you suggested path of model library example of thermal T control to reach a given temperature at a given point in a model. and also for above suggested example by you. Thank you
Kanhaiya Singh
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Apr 2, 2013, 1:10 a.m. EDT
Sir
Can you suggested path of model library example of thermal T control to reach a given temperature at a given point in a model. and also for above suggested example by you.

Thank you
Sir Can you suggested path of model library example of thermal T control to reach a given temperature at a given point in a model. and also for above suggested example by you. Thank you

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