Improvement of the Inverse Analysis Approaches for Assessment of Welding Deformations and Residual Stresses by Using Thermo Elasto-Plastic Welding Simulation : 1st Report, Stress Analysis for the Bead Flush Method

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  • MASUDA Kotaro
    東京工業大学情報理工学研究科
  • NAKAMURA Haruo
    Department of Mechanical and Environmental Informatics, Tokyo Institute of Technology

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Other Title
  • 溶接シミュレーション援用による溶接変形・残留応力の逆問題解析手法の精度向上 : 第1報,ビードフラッシュ法への適用
  • ヨウセツ シミュレーション エンヨウ ニ ヨル ヨウセツ ヘンケイ ザンリュウ オウリョク ノ ギャクモンダイ カイセキ シュホウ ノ セイド コウジョウ ダイ1ポウ ビードフラッシュホウ エ ノ テキヨウ

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Abstract

Recently, the design by analysis has been introduced. Concerning structural integrity assessment of the welding structures, however, application of the welding simulation as a design tool is relatively limited due to its lack of verification characteristics. So, it is necessary to develop a new analytical procedure for evaluation of the welding deformation and residual stresses. For this purpose authors have developed an inversed problem approach based on eigen-strain analysis, where further improvement of accuracy is desired. To solve this problem, a concept to utilize the welding simulation is proposed to make clear eigen-strain characteristics that affects the inverse analysis to assess welding deformations and residual stresses. Also, its utility is confirmed by applying it to "the bead flush method" that is useful to assess the residual stresses during in-service inspection non-destructively.

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