異種金属接合界面端部の応力特異性と摩擦圧接継手設計

概要

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The friction welding for dissimilar-metal is useful to minimize the diffusion thickness at the welded interface. The minimization of diffusion thickness is required for maintaining the joint strength. However, it is generally difficult to maintain the joint strength. Because brittle intermetallic compounds are necessarily formed at the friction welded interface of dissimilar-metal. The design techniques on joint strength characteristics have not fully been clarified. In this study, stress singularities at the intersection of free surfaces and the interface of various dissimilar-metal were investigated using singular analysis and finite element analysis. As a result, it was made clear that the no free-edge stress singularities existed in the range of apex angles, that were determined by the combination of dissimilar-metal. Especially, it was confirmed that the compressive stress could be observed in the no singular range below an apex angle of 60゜by filite element analysis. Finally, the design technique of dissimilar-metal friction welded joint was investigated by paying attention to the geometry of welded interface. "
一般社団法人日本機械学会の論文
2001-01-25