Hello Aniket,nnMany thanks for the feedback,nI want use APDL material models in ANSYS WORKBENCH.nnThis is other queastion>> Today I build the model in workbech and exported to apdl and edited the selceted material models to Drukcer Prager. Linear to non linear>>when i perform the simulation APDL closing automatically. Do you have any sugesstions for this. Attached apdl file closing automatically when i perform simulation. nnplease give your saggestions on this.nnkind regards,nNMnn