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Ansys Learning Forum › Forums › Discuss Simulation › Materials › How Do I Add A Material Which Properties Depend On Direction In Engineering Data › Reply To: How Do I Add A Material Which Properties Depend On Direction In Engineering Data

May 7, 2024 at 8:27 pm
Armin
Ansys Employee

The question mark appears because you haven't defined a hardening (stress-strain) curve for your model. You can add the hardening curve using the bilinear or multilinear isotropic hardening models under the Plasticity tab.

The value of (1/sqrt(3) ≈ 0.58) is from the ratio of shear yield stress to tensile yield stress using isotropic von Mises criterion and is just an estimate. If you have experimental data for your specific material, you can use those corresponding values for the shear yield stress ratios.