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EVALUATION OF THE FINITE ELEMENT MODELING OF A SPOT WELDED REGION FOR CRASH ANALYSIS  

Song, J.H. (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Huh, H. (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Kim, H.G. (Automotive Steel Research Center, POSCO)
Park, S.H. (Automotive Steel Research Center, POSCO)
Publication Information
International Journal of Automotive Technology / v.7, no.3, 2006 , pp. 329-336 More about this Journal
Abstract
The resistance spot-welded region in most current finite element crash models is characterized as a rigid beam at the location of the welded spot. The region is modeled to fail with a failure criterion which is a function of the axial and shear load at the rigid beam. The calculation of the load acting on the rigid beam is important to evaluate the failure of the spot-weld. In this paper, numerical simulation is carried out to evaluate the calculation of the load at the rigid beam. At first, the load on the spot-welded region is calculated with the precise finite element model considering the residual stress due to the thermal history during the spot welding procedure. And then, the load is compared with the one obtained from the model used in the crash analysis with respect to the element size, the element shape and the number of imposed constraints. Analysis results demonstrate that the load acting on the spot-welded element is correctly calculated by the change of the element shape around the welded region and the location of welded constrains. The results provide a guideline for an accurate finite element modeling of the spot-welded region in the crash analysis of vehicles.
Keywords
Resistance spot weld; Failure load; Electro-thermal analysis; Crashworthiness; Finite element modeling;
Citations & Related Records

Times Cited By Web Of Science : 6  (Related Records In Web of Science)
Times Cited By SCOPUS : 5
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1 Huh, H. and Kang, W. J. (2002). Crash-worthiness assessment of thin-walled structure with the highstrength steel sheet. Int. J. Vehicle Design 30, 1/2, 1-21   DOI
2 Johnson, G. R. and Cook, W. H. (1983). A constitutive model and data for metals subjected to large strain, high strain rates and high temperature. Proc. 7th Int. Symp. Ballistics, Hague, Netherlands, 115−120
3 Lee, Y., Wehner, T., Lu, M., Morrissett, T. and Pakalnins, E. (1998). Ultimate strength of resistance spot welds subjected to combined tension and shear. J. Test. Eval., 26, 3, 213−219   DOI   ScienceOn
4 Lin, S.-H., Pan, J., Wu, S.-R., Tyan, T. and Wung, P. (2002). Failure loads of spot welds under combined opening and shear static loading conditions. Int. J. Solids Struct., 39, 19-39   DOI   ScienceOn
5 Xu, S. and Deng, X. (2003). An evaluation of simplified finite element models for spot welded joints. Finite Elem. Anal. Des., 40, 1175-1194   DOI   ScienceOn
6 Yancey, R. N. (2004). Impact modeling of spot welds. Proc. 8th Int.l Conf. Numerical Methods in Industrial Forming Processes, Columbus, Ohio, U.S.A., 1215−1218
7 Huh, H., Lim, J. H., Song, J. H., Lee, K.-S., Lee, Y.-W. and Han, S. S. (2003). Crashworthiness assessment of side impact of an auto-body with 60 trip steel for side member. Int. J. Automotive Technology 4, 3, 149-156
8 Lee, H. Y., Kim, N. H. and Lee, T. S. (2005). Overload failure curve and fatigue behavior of spot-welded specimens. Eng. Fract. Mech., 72, 1203-1221   DOI   ScienceOn
9 ASM Handbook Committee (1985). Metals Handbook 9th Edn., American Society for Metals. Metal Park. Ohio
10 Deng, X., Chen, W. and Shi, G. (2000). Three dimensional finite element analysis of the mechanical behavior of spot welds. Finite Elem. Anal. Des., 35, 17−39
11 Huh, H., Lim, J. H., Kim, S. B., Han, S. S. and Park, S. H. (2004). Formability of the steel sheet at the intermediate strain rate. Key Eng. Mater. 274-276, 403−408   DOI
12 Lin, S.-H., Pan, J., Tyan, T. and Prasad, P. (2003). A general failure criterion for spot welds under combined loading conditions. Int. J. Solids Struct., 40, 5539-5564   DOI   ScienceOn
13 HSK (2004). ABAQUS/Standard User's Manual. Hibbit, Karlsson & Sorensen Inc.. Pawtucket. Rhode Island
14 Du Bois, P. A. (2001). Crashworthiness Engineering with LS-DYNA. Livermore Software Technology Co.. Livermore. California
15 Huh, H. and Kang, W. J. (1997). Electrothermal analysis of electric resistance spot welding procedures by a 3-D finite element method. J. Mater. Process. Techno., 63, 672-677   DOI
16 Kang, W. J. and Huh, H. (2000). Crash analysis of autobody structures considering the strain-rate hardening effect. Int. J. Automotive Technology 1, 1, 35-41
17 Zuniga, S. M. and Sheppard, S. D. (1995) Determining the constitutive properties of the heat-affected zone in a resistance spot weld. Modeling Simul. Mater. Sci. Eng., 3, 391-416   DOI   ScienceOn
18 Langrand, B. and Combescure, A. (2004). Non-linear and failure behavior of spotwelds: a global finite element and experiments in pure and mixed modes I/II. Int. J. Solids Struct., 41, 6631-6646   DOI   ScienceOn
19 LSTC (1999). LS-DYNA Keyword User's Manual. Nonlinear dynamic analysis of structures, Livermore Software Technology Co.. Livermore. California
20 Huh, H., Kang, W. J. and Han, S. S. (2002). A tension split Hopkinson bar for investigating the dynamic behavior of sheet metals. Exp. Mech. 42, 1, 8−17
21 Kang, H. T. (2005). Fatigue damage parameter of spot welded joints under proportional loading. Int. J. Automotive Technology 6, 3, 285-291