On the post-processing techniques for elastoplastic axisymmetrical problems

In this paper, superconvergent patch recovery techniques [see Refs Zienkiew icz and Zhu (1992); Blacker and Belytschko (1994)] which have been proposed for linear elliptic problems are generalized here to the elastoplastic axi symmetrical problems. Numerical examples for axisymmetrical problems (using 4-node quadrilateral elements) are presented to illustrate the reliability of this generalization. As an outcome of our study, the superior performan ce of the modified post-processing technique, Blacker and Belytschko (1994) , in comparison with the standard one, Zienkiewicz and Zhu (1992), is found through the numerical results.