A simple implicit scheme for stress response computation in plasticity models

摘要

In this work, the authors propose an efficient numerical method for evaluating the plastic response of a material for the applied load. Focus is confined to plas- ticity models using a yield surface and to small strains. The main advantage of the method is that there is no iteration meed be done for the yield surface drift correction and applies a single point integration. To compute the re- sponse of a material for a particular loading, the incre- mental constitutive equation is derived from the plasticity model used and then it is numerically integrated. Since finite increments are used in the numerical integration procedure, computational error crop up and accumulate causing inconsistencies in the response calculation.