nDMaterial('MultiaxialCyclicPlasticity', matTag, rho, K, G, Su, Ho, h, m, beta, KCoeff)

This command is used to construct an multiaxial Cyclic Plasticity model for clays

matTag (int) integer tag identifying material
rho (float) density
K (float) buck modulus
G (float) maximum (small strain) shear modulus
Su (float) undrained shear strength, size of bounding surface \(R=\sqrt{8/3}*Su\)
Ho (float) linear kinematic hardening modulus of bounding surface
h (float) hardening parameter
m (float) hardening parameter
beta (float) integration parameter, usually beta=0.5
KCoeff (float) coefficient of earth pressure, K0