Gradient-based refinement indicators in adaptive finite element analysis with special reference to sheet metal forming

摘要

Two mesh refinement indicators based on the gradients of effective stress (GSIG() and effective plastic strain (GEPS), respectively, are proposed for adaptive finite element analysis of the large deformation quasi-static or dynamic response of shell structures. The mesh refinement indicators are based on equi-distributing the variation of stresses or plastic strains over the elements of the mesh.