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Overload Analysis and Fatigue Life Prediction Using an Effective J-Integral of Spot Welded Specimens
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 Title & Authors
Overload Analysis and Fatigue Life Prediction Using an Effective J-Integral of Spot Welded Specimens
Lee, Hyeong-Il; Choe, Jin-Yong;
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 Abstract
This paper proposes an integrated approach, which is independent of specimen geometry and loading type, for predicting the fatigue life of spot welded specimens. We first establish finite element models reflecting the actual specimen behaviors observed on the experimental load-deflection curves of 4 types of single spot welded specimens. Using finite element models elaborately established, we then evaluate fracture parameter J-integral to describe the effects of specimen geometry and loading type on the fatigue life in a comprehensive manner. It is confirmed, however, that J-integral concept alone is insufficient to clearly explain the generalized relationship between load and fatigue life of spot welded specimens. On this ground, we introduce another effective parameter composed of , , , which has been demonstrated here to more sharply define the relationship between load and fatigue life of 4 types of spot welded specimens. The crack surface displacement method is adopted for decomposition of J, and the mechanism of the mixed mode fracture is also discussed in detail as a motivation of using
 Keywords
Spot Welded Specimen;Overload Analysis;Fatigue Analysis;Finite Element Model;J-Intergral;Effective Crack Driving Parameter ;Fatigue Life;
 Language
Korean
 Cited by
1.
K_e에 의한 차량 안전벨트 앵커의 점용접 피로수명 예측,김남호;이형일;

대한기계학회논문집A, 2000. vol.24. 3, pp.701-709 crossref(new window)
2.
정사각 모자형 박판튜브의 에너지흡수특성 및 최적 용접간격,이형일;김범준;한병기;

대한기계학회논문집A, 2002. vol.26. 12, pp.2703-2714 crossref(new window)
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