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Failure Mode of Laser Welds in Lap-Shear Specimens of HSLA Steel
Technical Paper
2010-01-0973
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Failure mode of laser welds in lap-shear specimens of high strength low alloy (HSLA) steel is investigated in this paper. The experimental results from quasi-static tests show that the laser welds failed in a ductile necking/shear failure mode near the heat affected zone. In order to understand the failure mode of these welds, a finite element analysis under plane strain conditions was conducted to identify the effects of the different plastic behaviors of the base metal, heat affected zone, and weld metal on the ductile failure. The results of the finite element analysis show that the higher effective stress-plastic strain curves of the weld metal and the heat affected zone results in the necking/shear failure mode. The deformed shape of the finite element model near the weld matches well with that of a failed weld. A finite element analysis of the lap-shear specimen with consideration of void nucleation and growth for all material elements based on the Gurson yield function was also carried out. The results of the finite element analysis based on the Gurson yield function are in good agreement with the experimental observations of the dimple fracture surface of the failed specimens.
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Citation
Asim, K., Lee, J., and Pan, J., "Failure Mode of Laser Welds in Lap-Shear Specimens of HSLA Steel," SAE Technical Paper 2010-01-0973, 2010, https://doi.org/10.4271/2010-01-0973.Also In
References
- Hsu, C. Albright, C. E. 1991 Fatigue analysis of laser welded lap joints Engineering Fracture Mechanics 39 575 580
- Wang, P.-C. Ewing, K.-M. 1991 A comparison of fatigue strengths: laser beam vs. resistance spot welds Welding Journal 70 43 47
- Flavenot, J.-F. Deville, J.-P. Diboine, A. Cantello, M. Gobbi, S.-L. 1993 Fatigue resistance of laser welded lap joints of steel sheets Welding into World 31 358 361
- Wang, P. C. 1995 Fracture mechanics parameter for the fatigue resistance of laser welds International Journal of Fatigue 17 25 34
- Ono, M. Kabasawa, M. Omura, M. 1997 “Static and fatigue strength of laser-welded lap joints in thin steel sheet” Welding International 11 462 467
- Terasaki, T. Sobue, T. Kitamura, T. 2001 Study of fatigue strength of laser welded lap joint Quarterly Journal of Japan Welding Society 19 507 512
- Kaitanov, A. Yu. Ozersky, A. D. Zabelin, A. M. Kislov, V. S. 2002 Static and fatigue strengths of laser welded overlap joints with controlled penetration Proc. SPIE 4644 116 126
- Cho, S.-K. Yang, Y.-S. Son, K.-J. Kim, J.-Y. 2004 Fatigue strength in laser welding of the lap joint Finite Elements in Analysis and Design 40 1059 1070
- Sonsino, C. M. Kueppers, M. Eibl, M. Zhang, G. 2006 Fatigue strength of laser beam welded thin steel structures under multiaxial loading International Journal of Fatigue 28 657 662
- Chien, W. Y. Pan, J. Friedman, P. A. 2003 Failure prediction of aluminum laser-welded blanks International Journal of Damage Mechanics 12 193 223
- Casavola, C. Pappalettere, C. Tattoli, F. 2009 Experimental and numerical study of static and fatigue properties of titanium alloy welded joints Mechanics of Material 41 231 243
- Asim, K. Lee, J. Pan, J. 2010
- Sripichai, K. Asim, K. Jo, W.H. Pan, J. et al. “Fatigue Behavior of Laser Welds in Lap-Shear Specimens of High Strength Low Alloy (HSLA) Steels,” SAE Int. J. Mater. Manuf. 2 1 40 46 2009
- ABAQUS 2008 User's manual for Version 6.8 SIMULIA Providence, RI
- Lee, J. Asim, K. Pan, J. 2010
- Gurson, A. L. 1977 Continuum theory of ductile rupture by void nucleation and growth: Part 1 - yield criteria and flow rules for porous ductile media Engineering Material and Technology 99 2 55