Bom,

If there is an expansion it is definitely temperature related. Sometimes you assign temperature to the previous element and keep it for the new element without noticing; sometimes the attached nodes (s) of element might be moving. It is hard to say something without seeing the details in the model.

Otherwise you need to follow the guide called "Modeling Spring Cans with Friction" in the Caesar II Applications Guide Page 4-19.

Regards,


Ibrahim Demir