Abstract
A formulation for elasticplastic constitutive equations is given based on principles of continuum thermomechanics and thermodynamics.
Energy dissipation and phase changes are included in the mathematical model. It is shown that kinematic hardening can be described properly for large deformations, by a twofractions model.
A mixed EulerianLagrangian finite element method has been developed by which nodal point locations may be adapted independently of the material displacement. Numerical problems, due to large distortions of elements, as may occur in the case of an Updated Lagrangian method, can be avoided, movement of (free) surfaces can be taken into account by adapting nodal surface point locations in a way that they remain on the moving surface. Local and weighed global smoothing are introduced in order to avoid numerical instabilities.
Applications are shown by simulations of an upsetting process, a wire drawing process and a steel quenching process. The results of the simulation of the upsetting process show satisfactory agreement with the results of an experiment carried out.
Original language  Undefined 

Awarding Institution 

Supervisors/Advisors 

Award date  20 Jun 1986 
Place of Publication  Enschede 
Publisher  
Publication status  Published  20 Jun 1986 
Keywords
 METIS267669
 IR72608
Cite this
Huetink, H. (1986). On the simulation of thermomechanical forming processes. Enschede: Universiteit Twente.