Analysis, evaluation, and implementation of a nonassociative model for geologic materials

A plasticity model involving nonassociative flow rule in the hierarchical modelling approach is considered with respect to response of cohesionless materials. Five different schemes including associative response, and four others to represent the nonassociative response are analyzed from the viewpoints of accuracy and computer time. Comprehensive laboratory tests under multiaxial stress paths for a sand and predictions from a nonlinear finite...