境界要素法による薄板突合せ溶接残留応力の同定法

概要

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A simplified identification method by the boundary element method is proposed to estimate the residual stress distribution due to butt-welds of thin plates. In general, the residual stress distribution is produced by the shrinkage source in the plate after welding. Therefore, if the value of the shrinkage source is known, the residual stress distribution can be obtained from the shrinkage source by using a numerical analysis method. In this paper, the shrinkage source is replaced by the body forces of the boundary element method, and the body forces are identified by a few measured stress that can be obtained by, for example, X-ray method. The validity of the proposed method is demonstrated by numerical simulation. By this simulation, the applicability and effectiveness of the proposed method is confirmed from examples without error. Also, the same numerical simulation with error is conducted. From the result, if the number of measured points was more than ten, a better agreement between the assumed and the identified values could be obtained.
一般社団法人日本機械学会の論文
1995-09-25