Material Laws 29, 30, 31

Up to 3 material user’s laws (law 29, 30 and 31) can be defined for 3D, 2D solid elements and 3D shell elements. User’s laws for beam or truss elements are not available.

To define a user’s law, two subroutines for each law. One must be linked with Radioss Starter and the other with Radioss Engine.

The Starter subroutine is called LECM29, LECM30, or LECM31 and is used to read material data and to initialize material parameters.

The Engine subroutine for solids is called SIGEPS29, SIGEPS30, or SIGEPS31 and is used to compute the solid element stress tensor at the integration point.

The corresponding shell subroutines are SIGEPS29C, SIGEPS30C or SIGEPS31C.
Note: All communication between Radioss and the subroutines takes place within the argument list.