The example subroutine defines a 3D material with plane strain and axisymmetric stress states. The analysis uses the 3D solid element SOLID185. Comparison is made with the prediction by the TB,PLAS,,,,BISO material option.

The example is a two-element test case under simple tension. Element 1 has material defined using the TB,USER option, while Element 2 has material defined using the TB,PLAS,,,,BISO option. A 100-percent deformation is applied to both elements. Finite deformation (NLGEOM, ON) is considered. The POST26 processor results of stress components (Sxx, Syy ) and plastic strain components (EPxx, EPyy) are printed for both elements. They are expected to be the same.