General Mechanical

General Mechanical

Adding bilinear isotropic hardening to Drucker-Prager Strength model

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    • dcooper1978
      Subscriber

      I'm new to work-bench and am working on a simple project to verify a material model using some data.

      The material is gravel and I was hoping to use a drucker-prager yield function with linear isotropic hardening. If such a model exists, I'm having a hard time finding it.

      Is it possible to add isotropic hardening to a drucker-prager yield function?

      A plot of deviatoric stress (psi) vs strain(%) is shown below at different confinement pressures (7.5, 12.5, and 17 psi).

    • dcooper1978
      Subscriber
      I guess I should mention that I've been working with with explicit dynamics.
    • 1shan
      Ansys Employee
      I am not sure if you can combine a drucker-prager yeild surface with an isotrpic hardening model in explicit dynamics. However, this could be done in a transient structural analysis system as shown in section 8.5.2.8. PLASTIC (MISO) and EDP Example of the Mechanical APDL Material Reference Guide.
      Regards Ishan.
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