Learning Forum

[dcooper1978]

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]

I guess I should mention that I've been working with with explicit dynamics.

[1shan]

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.