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Material Properties

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  3. Q. Why does nonlinear adaptive remeshing (NLAD) not resolve a metal plasticity application failing to convergence with element distortion error?

Q. Why does nonlinear adaptive remeshing (NLAD) not resolve a metal plasticity application failing to convergence with element distortion error?

Tagged: 18.2, materials, mechanical, NLAD, plasticity, structural-mechanics
    • January 25, 2023 at 7:34 am
      FAQFAQ
      Participant

      A. In this particular case, the issue appeared to be that the plastic strain is beyond the last data point of the KINH curve resulting in zero stiffness. NLAD only makes this worse. The solution was to switch to BKIN and define a small nonzero tangent modulus for stability. With this change, the model solved without the need for NLAD.

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