Automatic remeshing for three-dimensional finite element simulation of welding

Computer Methods in Applied Mechanics and Engineering, Elsevier, Vol 147, pp.401-409, 1997

MESHING
RESEARCH
CORNER

L.-E. Lindgren and H.-A. Haggblad
Lulea University of Technology, 971 87 Lulea. Sweden

J.M.J. McDill
Carleton University. Ottawa, KIS 5B6. Canada

A.S. Oddy
Oddy/McDill Numerical Investigation Sciences Inc.. Ottawa, K1G OW8. Canada

Abstract
Three-dimensional finite element simulation of electron beam welding of a large copper canister has been performed. The use of an automatic remeshing algorithm, based on a graded hexahedral element was found to be effective. With this algorithm the strongly nonlinear thermomechanical effects locally close to the moving heat source can accurately be modelled using a dense element mesh that follows the heat source.