I am doing hyper elastic model in ANSYS using Mooney Rivilian model. I have selected 2 parameter model and I am fitting the constants using the experimental uni axial data. After fitting, the constants are found out. But for material model, one more parameter d is also there. Should I externally supply the value? I have assumed my material is in compressible. When I do modelling using these material constants by assigning d=0, I always face in stability of solution and Ansys automatically closes. Even before solving the model, I am getting around 4 errors in element formation etc. Could you please help me to resolve this. I am new to this entire field. I am learning with examples.
Thanks in advance.