Mechanical Study on the Effect of Initial Gap upon the Weldability of Spot Weld Joint : Prediction of Contact Area in Squeezing Process(Physics, Process, Instrument & Measurement)

概要

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It has been reported that the weldability of the spot weld joint with initial gap is strongly influenced by the contact between the members to be welded. The state of contact during the welding largely depends on the deformation in the squeezing process. On the other hand, the characteristics of the deformation change with the geometry of the joint and the material property. Thus, the authors analyzed the deformation under squeezing process by the Finite Element Method to clarify the effects of geometry and material properties. Based on the numerical analyses, it is shown that a mechanical similarity rule holds for the contact bahavior during the squeezing process. Further, a general and yet relatively simple procedure is proposed to predict an allowable size of the initial gap to get sound welds.
大阪大学の論文