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An Experimental Investigation of Limit Loads and Fatigue Properties of Spot Welded Specimens
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 Title & Authors
An Experimental Investigation of Limit Loads and Fatigue Properties of Spot Welded Specimens
Lee, Hyeong-Il; Kim, Nam-Ho; Lee, Tae-Su;
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The study on the mechanical behavior of a spot-welded specimen is largely divided into the quasi-static overload failure analysis and the fatigue failure prediction. The main issue in an overload analysis is to examine the critical loads, thereby providing a generalized overload failure criterion. As the welding spot forms a singular geometry of an external crack type, fatigue failure of spot-welded specimens can be evaluated by means of a fracture parameter. In this study, we first present the limit loads of 4 representative types of single spot-welded specimens in terms of the base metal yield strength and specimen geometries. Recasting the load vs. fatigue life relationships experimentally, obtained here, we then predict the fatigue life of spot-weld specimens with a single parameter denoted the equivalent stress intensity factor. This crack driving parameter is demonstrated to successfully describe the effects of specimen geometry and loading type in a comprehensive manner. The suggested fatigue life formula for a single spot weld can play a key, role in the design and assessment of spot-welded panel structures, in that the fatigue strength of multi-spots is eventually determined by the fatigue strength of each single spot.
Spot Welding;Overload Failure;Limit Load;Fatigue Failure;Fatigue Life;Fracture Mechanics;Equivalent Stress Intensity Factors;
 Cited by
K_e에 의한 차량 안전벨트 앵커의 점용접 피로수명 예측,김남호;이형일;

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점용접시편의 과부하해석 및 유효 J-적분에 의한 피로수명예측,이형일;최진용;

대한기계학회논문집A, 2000. vol.24. 3, pp.567-580 crossref(new window)
저항 점 용접부의 피로강도에 미치는 잔류응력의 영향,양영수;손광재;조성규;홍석길;김선균;모경환;

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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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