ANALYSIS OF 3-D FEM ON ELASTIC-PLASTIC CONTACT PROBLEM WITH FRICTION

摘要

Based on the FEM (3-dimensional finite element method) and plastic increment in flow theory, a constitutive equation is derived, as well as a constitutive matrix of Mises model for uniform-strength materials under the action of complex stress. In FEM calculation, an accurate method of first order self-correction is introduced, and three kinds of boundary (i.e. free, adherent and sliding boundary) with contact elements applied are set up. The method of condensed matrix in association with FEM is used to solve the equation.