Z88-Forum

I need to insert a flow curve for rubber subject to compression.
I cannot understand whether the values of contraction deformation and compression stress must be entered with the negative sign.
can you help me?
Thank you

I have to simulate the behavior of a cylindrical elastomer capsule subjected to compression on one face and confined on its other sides. The simulation, of course, is conducted as non-linear. I don't understand whether the program admits a stress-strain curve of a non-symmetrical type ( an elastomer...