I tried to perform a cohesive zone analyse in ANSYS, followed the turorial in HELP file. I used contact element to model cohesive zone. and I find out that:
1, if I use standard material of ansys to define bulk element, like defined by 'MP,EX,1,2.1e5 MP,PRXY,1,0.33 ' or 'tb,biso', I can get a reasonable contact result;
2, if I use usermat file to define bulk element, 'tb,user', then the solusion also is done, but the resulte seems not correct. two part of model not contact each other but some sections of them are coincide.
is there some specific settings on usermat for contact analyse?
please help me~