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i want to model viscoplasticity using Ansys APDL,Perzyna and Peirce or Anand

model offer us to do this modeling, and each modèle Contains different parameters.

the question is: how to determine the parameters (if we can determine them experimentally, what is the concerned test "tensile test or creep").

thanks for help.

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# How to define paramaters of perzyna viscoplastic model?

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