Author(s)

C.Y. Dong & H. Antes

Abstract

This paper presents an approach to elastoplastic axisymmetric frictional contact problems in the framework of the small strain theory. The material characteristic is taken into account by using an initial stress formulation and von Mises yield criterion. An extended r-minimum method is adopted to limit the size of each incremental step so that contact conditions at the interface are maintained constant within each load increment. In addition, an improved internal point stress integral equation is used in this analysis. Numerical results demonstrate that the approach has a good performance. 1 Introduction Most mechanical problems include various types of contacts. The non- linearity of contact problems is due to the following two aspects [1]: (1) the actual contact ar

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