David Weed
Ansys Employee

Hi a01167437

Thanks for your question. Please note that we are not allowed to download user files from the forum. We can provide general assistance, but viewing the model, troubleshooting, debugging code, etc. is outside of the scope of what we provide here. Regarding your model, it may be helpful to do a sanity check against some of our native damage models. You can find these in the MAPDL Material Reference in chapter 4 - Nonlinear Material Properties section 4.22 Material Damage: https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v211/en/ans_mat/mat_damageall.html. We have native models specifically for simulating damage in composite materials. You can also debug your code using FORTRAN write statements, to see values at various intervals. I hope that this information is helpful to you.