User defined subroutine UMAT for advanced constitutive models

David Mašín
masin@natur.cuni.cz

Date: 7 February 2011

Constitutive models available:

• A hypoplastic model for clays, basic version [3], version with structure [5], both with and without intergranular strain concept [6]
• Modified Cam clay model incorporating structure [4]
• Three surface kinematic hardening model (3-SKH) [7,8] with small strain elasticity from [9]
• von Wolffersdorff hypoplastic model [10], with and without intergranular strain concept [6]