Some Interesting Yield Surfaces

These are examples of some of the yield surfaces available in Zebulon. They are all fully implemented in the finite element code, and the volume element simulation module.

This is a plot of the composite surfaces for a HCP mono-crystal with basal, prism, and pyramidal slip systems. The material definition file may be seen here

This is a creep-damage surface for an equivalent damage rate of 1.e-9.