2020 Volume 38 Issue 2 Pages 121s-125s
Thermal elastic plastic analysis is used to predict welding deformation and residual stress. In the thermal elastic plastic analysis, the non-linear mechanical behavior of a welded is part consecutively analyzed. Therefore, to evaluate a complex structure, this analysis requires detailed modeling and a huge amount of computing time. However, the welded part is generally small compared to the whole structure, and it is very difficult to construct an analysis model for the whole structure that considers the welded part. In this research, the mesh superposition method is introduced to thermal elastic plastic analysis. The mesh superposition method makes it is possible to construct separate analysis models for the whole structure and the welded part. The applicability of the proposed method was investigated by comparison with a conventional analysis method. The result showed that the proposed analysis method has almost the same accuracy as the conventional method. The proposed method was also applied to the analysis of welding deformation in a structure consisting of multiple parts. The result indicated that the proposed method can effectively construct the complex analysis model by using a local mesh to join the multiple parts in a global mesh.
