Thank you very much for the reply. I just want to ask as I have to do xfem analysis with czm for crack growth in a material. But I don't have the critical energy release date information. Can I get it numerically? If yes, then in vcct I have to initiate a crack but in my actual problem I don't know where crack will form and grow that's why have to analyze it. So can you tell me how to find critical energy release rate?

With regards
Biswabhanu Puhan