スポット溶接構造の公称構造応力算出法 : 円筒殻構造への適用(<小特集>自動車技術を支える材料力学)

概要

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In order to improve a fatigue life prediction technology of a spot welded structure, the method to evaluate the fatigue life by a nominal structural stress (NSS) was proposed. The authors have proposed the method to obtain the NSS accurately for spot welded structure composed of flat sheets. The proposed method uses the general loads of the nugget and the displacements on the circumference of the diameter D with the center of the nugget, which are obtained from finite element analysis. In this study, the proposed method was applied to a spot welded cylindrical shell structure. As the result, it was found that the proposed method was able to accurately obtain the NSS by using the displacements on the circumference of the small diameter D.
2009-10-25