FINITE-ELEMENT ANALYSIS OF LARGE DEFORMATION BY AUTOMATIC RENODING AS A WEAK REMESHING TECHNIQUE

Abstract

An automatic renoding scheme is proposed as a new concept of "weak" remeshing for the finite element analysis of large deformation. In order to show the effectiveness of the scheme the following axisymmetric and three-dimensional backward extrusion processes are simulated; (i) backward extrusion of a cylindrical workpiece by a cylindrical punch with a rounded corner, and (ii) backward extrusion of a square block by a cylindrical punch with a rounded comer. Criteria for the renoding are automatically checked and the renoding scheme is carried out fully automatically. Experiments were carried out to check the validity of the proposed scheme for the three-dimensional case. Comparisons between the computed results and the experiments show that the proposed scheme can be effectively applied to metal forming processes of large deformation in connection with full remeshing.