Numéro
J. Phys. IV France
Volume 03, Numéro C7, Novembre 1993
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
Page(s) C7-1199 - C7-1209
DOI http://dx.doi.org/10.1051/jp4:19937185
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés

J. Phys. IV France 03 (1993) C7-1199-C7-1209

DOI: 10.1051/jp4:19937185

Numerical modelling of thermomechanical processes related to bulk forming operations

M. SCHÖNAUER1, T. RODIC1, 2 and D.R.J. OWEN1

1  Institute for Numerical Methods in Engineering, University College of Swansea, Singleton Park, Swansea SA2 8PP, Wales, U.K.
2  Faculty for Natural Science and Technology, University of Ljubljana, Askerceva 20, 61000 Ljubljana, Slovenia


Abstract
A thermomechanically sound, decoupled model, numerically unified for cold and hot bulk metal forming is cast into a finite element formulation. The mechanical module is based on elasto-(visco) plastic material costitutive laws and general interface frictional contact conditions with the assumption of rigid tools. Introduction of a logarithmic strain based finite strain model in the contex of a geometrically nonlinear assumed strain ntethod characterizes the numerical treatment of incompressibility at large deformations. A non-associated slip rule is employed in the contex of the plasticity theory of friction, with nonlinear master segment geometry describing the contact kinematics. Consistent linearisation in all aspects of algorithmic development provides robust and quadratically convergent solutions. This is shown in 2-D plane strain and axisymmetric numerical examples, where simulations of both cold and hot bulk metal forming processes are performed.



© EDP Sciences 1993