I am a new comer here and I need some help. I want to simulate the interface debonding process of bimaterial using the commercial FE software msc.marc, but I want to use my own cohesive law not the one given by the marc. so the user subrotine UCOHESIVE must be used, the problem is I dont know how to program using FORTRAN. I hope some one here can help me, if you have such a user subrotine, can you kindly sent it to me? that will give me a great hand. Thank you very much. Expect your reply.