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Solid Mechanics with Heat Transfer for Stress simulation

Posted 2023年1月25日 GMT-5 15:27 Heat Transfer, Materials, Structural Mechanics Version 6.1 3 Replies

Y Ko
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Hello

There is a cavity with pressure applied. Along with the pressure, I added theremal expansion to see stress caused by theraml expansion as well as pressure. However, whenever I add the themal expansion, my study fails with the following err. Would anyone please help me with this?

Feature: Stationary Solver 1 (sol1/s1) Failed to find a solution. Maximum number of Newton iterations reached. Returned solution is not converged. Not all parameter steps returned.

3 Replies Last Post 2023年2月9日 GMT-5 18:11
Y Ko
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Posted: 2 years ago 2023年1月25日 GMT-5 15:50

But the solid mechanis alone works fine without troubles.

But the solid mechanis alone works fine without troubles.
Henrik Sönnerlind COMSOL Employee

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Posted: 2 years ago 2023年1月30日 GMT-5 02:42
Updated: 2 years ago 2023年1月30日 GMT-5 02:47

The problem is that your coefficent of thermal expansion is 32.5, which is many orders of magnitude too large. There is no possibility for the geometric nonlinear problem to converge with thermal strains of the order of 10,000,000%.

I think that you intended to enter alpha = 37.5e-5.

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Henrik Sönnerlind
COMSOL
The problem is that your coefficent of thermal expansion is 32.5, which is many orders of magnitude too large. There is no possibility for the geometric nonlinear problem to converge with thermal strains of the order of 10,000,000%. I think that you intended to enter alpha = 37.5e-5.
Y Ko
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Posted: 2 years ago 2023年2月9日 GMT-5 18:11

Thank you. That makes sense. I made that mistakes. Thank you for cathcing it.

Thank you. That makes sense. I made that mistakes. Thank you for cathcing it.

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