Modelling of powder compaction processes via the displacement formulation and adaptive analysis

摘要

This paper presents a general framework for the finite element simulation of powder forming processing. Emphasis is given to the following aspects; a large displacement formulation, based on a total and updated Lagrangian formulation, an adaptive finite element strategy based on error estimates and automatic remeshing techniques, modelling of the highly non-linear behaviour of material using an elliptical cap model based on a hardening rule to define the dependence of the yield surface on the degree of plastic straining, and finally the use of an efficient contact algorithm in the context of an interface element formulation. A set of complex powder forming simulations demonstrates the ability of the proposed adaptive finite element approach.