Simplifying Methods for Analysis of Transient and Residual Stresses and Deformations due to Multipass Welding(WELDING MECHANICS, STRENGTH AND DESIGN)

概要

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Information about transient and residual stresses and deformations produced in welded joints by welding is important. One of the methods to obtain such information is to perform thermal elastic-plastic analysis. This method furnishes accurate results of them but needs long computation time (CPU time), especially in the case of multipass welding. So simplifying methods for analysis of residual stresses due to multipass welding are necessary. In this study, simplifications of thermal elastic-plastic analysis were carried out aiming to obtain the residual stress distribution of (1) the whole cross section of the welded joint, (2) the part of the cross section near the finishing bead, in short CPU time. As a result, for each purpose, the simplifying method was developed by which CPU time required for analysis can be much shortened, keeping the accuracy of analysis.
大阪大学の論文