Hi guys, I am using Pam solvers to create car destruction. But I have a problem that I can not understand. I refer to juraj's https://jurajtomori.wordpress.com/2016/01/16/fem-and-plasticity/ [jurajtomori.wordpress.com] to create a hip file. that's good for workflow on me. but when i used a sopsolver option ,my modelling change a freak shape .
And if I set the vol chage to 0 in the sop solver, there is no problem, but I can not get the plastic rigid of the fem.

Maybe my tet made a problem …? Or I missed something. ..