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Fatigue Life Evaluation of Spot Welding Including Loading Speed Effect  

A. Shimamoto (전북대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.12, no.1, 2003 , pp. 32-37 More about this Journal
Abstract
Evaluation of fatigue strength on the spot welded part is very important for strength design of spot welded steel structures. In this paper, we could get the life cycle of the spot welded part using the lethargy coefficient obtained through the quasi-static tensile shear test for the specimen welded by current 10kA. The reliability evaluation of the life cycle is completed by comparing the life cycle calculated under the constant loading rate with the life cycle obtained by dynamic fatigue test. And then the result calculated by the lethargy coefficient is verified through the lift cycle calculated using the dynamic final tensile stress formula under the increased loading speed. This way can make save the time and cost in processing of predicting the life cycle of a structure.
Keywords
Lethargy Coefficient; Spot Welding; Quasi-static Tensile-shear Test; Loading Speed; Fatigue Life Cycle;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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