Efficient meshfree formulation for metal forming simulations

A stabilized conforming (SC) nodal integration method is developed for elas toplastic contact analysis of metal forming processes. In this approach, st rain smoothing stabilization is introduced to eliminate spatial instability in collocation meshfree methods. The gradient matrix associated with strai n smoothing satisfies the integration constraint (IC) of linear exactness i n the Galerkin approximation. Strain smoothing formulation and numerical pr ocedures for history-dependent problems are introduced. Applications to met al forming analysis are presented, with the results demonstrating a signifi cant improvement in computational efficiency without loss of accuracy.