Development and practical application of fast prediction scheme of resistance spot welding induced deformation using inherent strain method

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  • 抵抗スポット溶接変形の固有ひずみ法による高速予測技術の開発および適用検証

Abstract

<p>In a car body, there are thousands of resistance spot welds which may induces large deformation during manufacturing process. Therefore, it is strongly expected by automotive industries to develop a fast and simple prediction method for its deformation. Conventionally, the inherent strain method has been applied to line welding such as arc welding, and it has the advantage of short calculation time compared to the thermal elastic-plastic analysis. On the other hand, the application to resistance spot welding deformation has not been investigated so far. In this study, the inherent deformation due to resistance spot welding was defined based on the inherent strain method. In addition, the deformation of a vehicle part with 23 resistance spot welds was predicted using the inherent strain method and showed a good accuracy compared with the measurement.</p>

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