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Dear all , I want to medel a 3d sandwich wall panel with different material layers.Also, I am going to model interface element between layers. I want to use the Standard Brick Element for concrete and Foam layers and materials such as concrete 02 for conctere. but concrete 02 is a uniaxial material ...

hi.mr amini my IDA curve in not linear but it has not flatline at the end!!! what is resone??
i can send my model for you.

thanks a lot