界面要素を用いたFEMによる溶接高温割れに関する理論的研究 : (第一報) : 温度依存型界面要素の開発

概要

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Based on the interface element proposed for the crack propagation problems, a finite element method (FEM) using temperature dependent interface element is developed. The proposed method is applied to the analysis of occurrence and propagation of hot cracking in welding. Especially the hot cracking extending from the starting end of the narrow rectangular plate under bead welding is examined using the proposed method. The following conclusions are drawn. In case of high welding speed, large heat input and small width of plate, hot cracking is likely to occur. This agrees with the phenomena generally observed in experiments. The proposed method can simulate not only occurrence and propagation of hot cracking, but also the contact of the starting edge of the plate after complete cooling.
1999-09-25