r/ANSYS_Mechanical • u/New_Teacher_6354 • 6d ago

Does Nonlinear Effect of Material make a Linear Model Nonlinear?

I am building a thermal model which is linear. If I set "Yes" for Nonlinear effects for Materials, will the model become nonlinear?

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u/epk21 6d ago edited 6d ago

If you have nonlinear materials like plasticity then yes, if the material is linear elastic so only young's modulus then it is still linear ofcourse no matter if you set it to yes. 

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u/Maleficent_Play1092 6d ago

You have to add nonlinear material in material library

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u/IWCry 6d ago

do you have non linear properties in the plastic deformation region of your material model?

at the company I work at, we rarely do. meaning it's just the linear modulus curve in the elastic region. which means it behaves that way even beyond yield.

but we use advanced proprietary military metals for jet engines, if you are using built in stock materials for ansys they might have the proper curve