ABSTRACT
Conventional elastoplastic critical state based constitutive models for soil behavior are formulated primarily in stress space with one or more yield surfaces defined in terms of principal stresses. Alternatively, several constitutive models for geomaterials have been proposed over the years that are formulated entirely in strain space due to certain analytical and computational advantages over the conventional models (e.g. Yoder & Iwan (1981) and Iwan & Chelvakumar (1988)). While most of these have failed to gain traction outside of academic realms, the BRICK model (Simpson 1992) has been continuously utilized and developed for industrial applications within Arup Geotechnics for more than two decades.
