Three-dimensional welding analysis using an adaptive mesh scheme

One major problem arising in finite element analysis of welding is the long computer times required for a complete three-dimensional analysis. An adap tive strategy for coupled thermo-mechanical analysis of welding is applied in order to reduce the computer time. The paper describes a generic posteri ori error formulation that evaluates both the thermal and the mechanical er ror distribution. It is combined with a hierarchic remeshing strategy using a so-called graded element. The error indicator together with the known mo vement of the local heal source is used to predict areas of refinement. An increased accuracy is obtained with a reduced computational effort. (C) 200 0 Elsevier Science S.A. All rights reserved.