====== M Command ======

M,<nm>,<val1>,<val2>,<weight>,<pdamp>,<sdamp>,<type>

defines the material number <nm>. If <type> = 1, <val1> is the elasticity modulus and <val2>  is the poisson coefficient; if <type> =  2, <val1> and <val2> are the constrained and shear moduli; and if <type> = 3, <val1> and <val2> are the P- and S-Wave velocities. For all cases, <weight> is the specific weight, <pdamp> is the P-wave damping ratio, and <sdamp> is the S-wave damping ratio.

Note: <pdamp> and <sdamp> must be equal for materials assigned to SHELL elements.