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Change young's modulus according to solutions

Posted 2015年2月24日 GMT-5 21:14 Modeling Tools & Definitions, Parameters, Variables, & Functions Version 4.4 0 Replies

Tianhang Bai
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Dear all,

In my model, I use the FSI module and I define that if the von mises stress in the solid is larger than 1e5 Pa, the young’s modulus reduces from 2e8 to 10. Therefore, I add a Domain ODE module and write ‘EE-(10*(fsi.mises>1e5)+2e8*(fsi.mises<=1e5))’ in the source term (EE is the dependent variable, namely young's modulus), and the initial value for EE is 2e8, but the result shows that young’s modulus does not go down to 10 if the stress exceeds the certain value, like shown in the figure attached. Would you please give me some advice on reducing E values using ODE?

Thanks,
Tianhang

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0 Replies Last Post 2015年2月24日 GMT-5 21:14
COMSOL Moderator

Hello Tianhang Bai

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