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Linear vs non-linear temperature dependent material

Linear vs non-linear temperature dependent material

Linear vs non-linear temperature dependent material

(OP)
I have tried the follwoing:
2 models with same mesh, force and temperature load and constrains.
The only difference is the material definition.
First model contains simple material definition for linear static load: E, nu, alfa and Tref
The second one is a little bit different: The E is temperature dependent function, but this function is constant and same with E.

My opinion I should get the same results for both model if the temperature and other loads are same, but this is not true in my case. Why?

Irwin

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