Browse > Article
http://dx.doi.org/10.5228/KSPP.2004.13.6.484

Fracture Analysis of Spot-Welds with Edge Cracks using 2-D Hybrid Special Finite Element  

Song J. H. (한국과학기술원 기계공학과)
Yang C. H. (한국과학기술원 기계공학과)
Huh H. (한국과학기술원 기계공학과)
Kim H. G. (POSCO 기술연구소)
Park S. H. (POSCO 기술연구소)
Publication Information
Transactions of Materials Processing / v.13, no.6, 2004 , pp. 484-489 More about this Journal
Abstract
This paper employed a systematic analysis using a 2-D hybrid special finite element containing an edge crack in order to describe the fracture behavior of spot-welds in automotive structures. The 2-D hybrid special finite element is derived form a mixed formulation with a complex potential function with the description of the singularity of a stress field. The hybrid special finite element containing an edge crack can give a better description of its singularity with only one hybrid element surrounding one crack. The advantage of this special element is that it can greatly simplify the numerical modeling of the spot welds. Some numerical examples demonstrate the validity and versatility of the present analysis method. The lap-shear, lap-tension and angle-clip specimens are analyzed and some useful fracture parameters such as the stress intensity factor and the initial direction of crack growth are obtained simultaneously.
Keywords
Spot Weld; Hybrid Special Element; Edge Crack; Stress Intensity factors;
Citations & Related Records
연도 인용수 순위
  • Reference
1 M.I. Muskhelilishvili, 1953, 'Some basic problems of the theory of elasticity', Nordhoff, Groningen, Holland
2 P. Ning and P. Sheri, 2002, 'Spot welds fatigue life prediction with cyclic strain range', Int. J. Fatigue, Vol. 24, pp. 519-528   DOI   ScienceOn
3 Maddox, S. J., 2000, ' Fatigue design rules for welded structures', Prog. Struct. Engng. Mater., Vol. 2, pp. 102-109   DOI   ScienceOn
4 P. Wung, 2001, ' A force-based failure criterion for spot weld analysis', Journal of Experimental Mechanics, Vol. 41, pp. 107-113   DOI   ScienceOn
5 D. Radaj and S. Zhang, 1998, 'Weld spot force evaluation with dented sheet material', Engineer-ing Fracture Mechanics, Vol. 61, pp. 673-678   DOI   ScienceOn
6 이태수, 이형일, 신수정, 1998 '용접점 파단의 정량적 모델 - I 파단조건', 한국자동차공학회 논문집, Vol. 6, No. 8, pp. 40-52
7 A. Combescure, F. Delcroix, L. Caplain, S. Espanol, P. Eliot, 2003, 'A finite element to simulate the failure of weld points on impact, International Journal of Impact Engineering', Vol. 28, pp. 783-802   DOI   ScienceOn
8 B.Chang, Y. Shi and L. Lu, 2001, 'Studies on the stress distribution and fatigue behavior of weld-bonded lap shear joints', Journal of Materials Processing Technology, Vol. 108, pp. 307-313   DOI   ScienceOn
9 P. Tong, 1970, 'New displacement hybrid finite element models for solid continua', Int. J. Num. Methods in Eng., Vol. 2, pp. 73-83   DOI