An improved accuracy analysis of elastoplastic integration algorithms

An improved accuracy analysis of elastoplastic integration algorithms is presented and proposed in this paper. The notion of the well–established isoerror maps is extended and polar plots are constructed for a wide range of stress points, algorithmically selected in the principal stress space. The selection of the stress points is independent of the yield surface and therefore a general procedure is obtained. The individual maps are then joined together to produce a complete view of the accuracy assessment of the stress update algorithm. The proposed procedure is validated in a characteristic multisurface yield criterion