音弾性法による溶接残留応力の測定 : 材料異方性主軸方向の影響評価

概要

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Many studies have been done on the acoustoelastic technique to measure residual stresses. However, the influence of the principal direction of the material anisotropy is not taken into account for the measurement. In this study, the influence of the material anisotropy on the acoustoelastic effect are evaluated. The residual stresses of the welded plate. of carbon steel are measured. The results obtained are as follows. (1) The influence of the material anisotropy an the acoustoelastic effect is significant far a welded plate of carbon steel. In this case, first, the polarization directions and the relative difference in velocity should be measured. Then, the principal directions of stress and the difference in principal stresses should be calculated using analytical results by Iwashimizu. (2) The sign of the relative difference in velocity in the weld metal is opposite (positive) to that in the base metal. The absolute value of the relative difference in velocity in the weld metal is larger than that in the base metal.
社団法人日本機械学会の論文
1988-04-25