What version of ANSYS are you using? nThere are many discussions on this forum for hyperelastic materials such as this one:n you have hyperelastic material experimental data for curve fitting the material constants?nHave you selected the hyperelastic material model?nThere are many discussions on using Frictional Contact on this forum such as:n should read the rest of that member's posts: this one he talks about FSI: create a workbench project archive with just the structural portion of the project. Delete the mesh and all results. Create a .wbpz archive file and attach it to your reply.n