laxman, The best place to start is the Mechanical APDL Programmers Reference, Part II: Guide to User-Programmable Features, Chapter 1: Understanding ...
Korasan, As Mats said, the thing that is generally missing in the standard derivation of a hyperelastic stiffness matrix is the formulation in a corot...
Jay, I havent really studied the details of your problem, but I have a few quick comments. For the TBDATA command, you can only enter up to 6 values p...
skacel, One method is to solve a load step that doesnt cause any displacements and store the gauss point coordinates as state variables only during th...
Attached is a detailed write-up of a Neo-Hookean user material for ANSYS MAPDL. It gives some of the steps in deriving the tangent stiffness, though...
Its not clear in your messages, but you seem to indicate you have Mooney Rivlin parameters that will fit the first loading portion of your uniaxial ex...
