Establishment of computational welding mechanics

Abstract

Numerical methods for the analysis of mechanical processes in welding have been developed for the last three decades. Due to the great advances in numerical methods such as the Finite Element Method (FEM) and the computer technologies, numerical methods in this field have reached the stage to establish computational welding mechanics. In this paper, the history of computational welding mechanics is reviewed. Also, the current research activities by the authors are summarized. Analyses of residual stresses and distortions in welding and cutting, measurement of three dimensional distribution of residual stresses and computation of weldability lobes for spot welding are presented as examples.

機械的プロセス解析への数値解法の開発を過去30年にわたって行ってきた。有限要素法やコンピュータ技術のような数値解法の長足の進歩により、この分野における数値解法は、コンピュータ計算による溶接力学を確立できるところまできた。本報では、コンピュータ計算による溶接力学の歴史を概観し、最近の研究成果をまとめた。溶接や切断における残留応力や歪の解析、残留応力の3次元分布の測定および点溶接の溶接性ローブのコンピュータ計算を例として示した。