A comparison of incremental behaviour of elastoplastic and CLoE models

A comparison between two classes of constitutive equations is presented. Th e comparison is based on two models, namely the classical bi-linear elastop lastic Von Mises model and an incrementally non linear model previously pro posed by the authors (called CLoE model). Both models exhibit the same beha viour for isotropic and deviatoric loading paths. Gudehus' diagram, inversi bility, second order work and shear band localization criteria are comparat ively analysed. As a result the two constitutive equations share some simil arities but the CLoE model gives a more appropriate and flexible descriptio n of shear band formation. Copyright (C) 1999 John Wiley & Sons, Ltd.