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  • Users: A7A
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  1. A7A

    UMAT convergence problem

    Hi, I'm simulating the behavior of anisotropic material using a UMAT subroutine. The UMAT works fine when using single element. However, when I use multiple elements (C3D8R), I get convergence problems. The problem is as follows: The simulation stops suddenly with error 'Too many...
  2. A7A

    PERZYNA material model (ANSYS (APDL)) ?

    Hi, I'm trying to get the stress-strain data of a specific material, by simulating the viscoplastic behaviour using a rate dependent material model (PERZYNA), but the problem is that when using this model for high strain rate (100 [s^-1]), I get approximately the same yield stress !! (see the...

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