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  1. Joe Chu

    A question about Umat for beam element

    Dear all, I am conducting to write a umat for simulating 2D or 3D beam. I am confused with DDSDDE of Umat. Actually, as we know, we must define a 6*6 matrix for 3D Solid element. I was wondering which kind of matrix should we define for beam element. 2*2 or 3*3? I have define a 3*3 ddsdde...

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