Paper Title:
Effect of Strain Rate Variation on Fatigue Life of Spot Welded Joint
  Abstract

Resistance spot welding is used extensively to fasten sheet for automotive applications. In many components, these welds should maintain their integrity under severe loading conditions. However fatigue strength of the spot welded joint is considerably lower than base metal due to stress concentration at the nugget edge, and is influenced by its geometrical and mechanical factors such as welding condition and etc. In this paper, it is estimated that effect of strain rate variation on fatigue life of spot welded joint. The analytical method proposed to overcome above difficult using lethargy coefficient concept for evaluating the fatigue life cycle of spot welded joint. The reliability of the life cycle is completed by comparing with the life cycle obtained by fatigue test for the specimen with the welding current. And the above procedure is numerically extended to get the life of dynamic strain rate region.

  Info
Periodical
Key Engineering Materials (Volumes 297-300)
Edited by
Young-Jin Kim, Dong-Ho Bae and Yun-Jae Kim
Pages
2447-2452
DOI
10.4028/www.scientific.net/KEM.297-300.2447
Citation
J. H. Song, H. S. Yu, H. Y. Kang, S. M. Yang, "Effect of Strain Rate Variation on Fatigue Life of Spot Welded Joint", Key Engineering Materials, Vols. 297-300, pp. 2447-2452, 2005
Online since
November 2005
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Price
$32.00
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