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restricted stress in time dependent problem

Posted 31 mars 2013, 08:26 UTC−4 Heat Transfer & Phase Change, Structural Mechanics Version 4.3 3 Replies

Kanhaiya Singh
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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 2 avr. 2013, 01:10 UTC−4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 31 mars 2013, 13:20 UTC−4
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
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Posted: 1 decade ago 1 avr. 2013, 07:48 UTC−4
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
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Posted: 1 decade ago 2 avr. 2013, 01:10 UTC−4
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

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