Hi Peter,

Thank you for your help, I tried to use those suggestions but I'm not able to model the tensile crack patterns in the rock. surely will send you the archive one of my Prof. suggested me to use explicit dynamic to model the plasticity in rock material I'm running that model I'm attaching that with this.

version: Ansys 18.2

But I heard that with the Solid65 element we can model the cracking in rock like material, if you have any idea about it can you please let me know how to implement it in the implicit analysis.