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Fatigue Behaviors of Aluminum 5754-O Spot Friction Welds in Lap-Shear Specimens
Technical Paper
2008-01-1139
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Fatigue behaviors of aluminum 5754-O spot friction welds made by a concave tool in lap-shear specimens are investigated based on experimental observations and a fatigue life estimation model. Optical micrographs of the welds before and after failure under quasi-static and cyclic loading conditions are examined. The micrographs indicate that the failure modes of the 5754 spot friction welds under quasi-static and cyclic loading conditions are quite different. The dominant kinked fatigue cracks for the final failures of the welds under cyclic loading conditions are identified. Based on the experimental observations of the paths of the dominant kinked fatigue cracks, a fatigue life estimation model based on the stress intensity factor solutions for finite kinked cracks is adopted to estimate the fatigue lives of the welds. The fatigue life estimations based on the fatigue life estimation model with parameters obtained from the experiments and a three-dimensional finite element analysis agree well with the experimental results.
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Citation
Tran, V., Pan, J., and Pan, T., "Fatigue Behaviors of Aluminum 5754-O Spot Friction Welds in Lap-Shear Specimens," SAE Technical Paper 2008-01-1139, 2008, https://doi.org/10.4271/2008-01-1139.Also In
References
- Thornton, P. H. Krause, A. R. Davies, R. G. 1996 The Aluminum Spot Weld Welding Journal 75 101s 108s
- Gean, A. Westgate, S. A. Kucza, J. C. Ehrstrom, J. C. 1999 Static and Fatigue Behavior of Spot-Welded 5182-O Aluminum Alloy Sheet Welding Journal 78 80s 86s
- Sakano, R. Murakami, K. Yamashita, K. Hyoe, T. Fujimoto, M. Inuzuka, M. Nagao, Y. Kashiki, H. 2001 Development of Spot FSW Robot System for Automobile Body Members Proceedings of the 3rd International Symposium of Friction Stir Welding Kobe, Japan Sep. 27-28 2001
- Iwashita, T. 2003 Method and Apparatus for Joining US Patent 6601751 B2 August 5 2003
- Lin, P.-C. Lin, S.-H. Pan, J. Pan, T. Nicholson, J. M. Garman, M. A. 2004 Microstructures and Failure Modes of Spot Friction Welds in Lap-Shear Specimens of Aluminum 6111-T4 Sheets SAE Technical Paper No. 2004-01-1330 Society of Automotive Engineers Warrendale, PA
- Pan, T. Joaquin, A. Wilkosz, D. E. Reatherford, L. Nicholson, J. M. 2004 Spot Friction Welding for Sheet Aluminum Joining Proceedings of the 5th International Symposium of Friction Stir Welding Metz, France Sep. 14-16 2004
- Fujimoto, M. Inuzuka, M. Nishio, M. Nakashima, Y. 2004 Development of Friction Spot Joining (Report 1) - Cross Sectional Structures of Friction Spot Joints The National Meeting of Japan Welding Society 74 4 5
- Fujimoto, M. Inuzuka, M. Nishio, M. Nakashima, Y. 2004 Development of Friction Spot Joining (Report 2) - Mechanical Properties of Friction Spot Joints The National Meeting of Japan Welding Society 74 6 7
- Hinrichs, J. F. Smith, C. B. Orsini, B. F. DeGeorge, R. J. Smale, B. J. Ruehl, P. C. 2004 Friction Stir Welding for the 21st Century Automotive Industry Proceedings of the 5th International Symposium of Friction Stir Welding Metz, France Sep. 14-16 2004
- Mitlin, D. Radmilovic, V. Pan, T. Chen, J. Feng, Z. Santella, M. L. 2006 Structure-Properties Relations in Spot Friction Welded (also Known as Friction Stir Spot Welded) 6111 Aluminum Materials Science and Engineering A 441 79 96
- Tran, V.-X. Lin, P.-C. Pan, J. Pan, T. Tyan, T. 2007 Failure Loads of Aluminum 6111-T4 Spot Friction Welds under Quasi-Static and Dynamic Loading Conditions SAE Technical Paper No. 2007-01-0983 Society of Automotive Engineers Warrendale, PA
- Lin, P.-C. Pan, J. Pan, T. 2005 Fracture and Fatigue Mechanisms of Spot Friction Welds in Lap-Shear Specimens of Aluminum 6111-T4 Sheets SAE Technical Paper No. 2005-01-1247 Society of Automotive Engineers Warrendale, PA
- Lin, P.-C. Pan, J. Pan, T. 2006 Fatigue Failures of Aluminum 6111-T4 Spot Friction Welds Under Cyclic Loading Conditions SAE Technical Paper No. 2006-01-1207 Society of Automotive Engineers Warrendale, PA
- Lin, P.-C. Pan, J. Pan, T. 2008 Failure Modes and Fatigue Life Estimations of Spot Friction Welds in Lap-Shear Specimens of Aluminum 6111-T4 Sheets, Part 1: Welds Made by a Concave Tool International Journal of Fatigue 30 74 89
- Lin, P.-C. Pan, J. Pan, T. 2008 Failure Modes and Fatigue Life Estimations of Spot Friction Welds in Lap-Shear Specimens of Aluminum 6111-T4 Sheets, Part 2: Welds Made by a Flat Tool International Journal of Fatigue 30 90 105
- Pan, T. 2007 Friction Stir Spot Welding (FSSW) - A Literature Review SAE Technical Paper No. 2007-01-1702 Society of Automotive Engineers Warrendale, PA
- Kaufman, J.-G. 2000 Introduction to Aluminum Alloys and Tempers The Materials Information Society - ASM International Materials Park, OH
- Newman, J.A. Dowling, N.E. 1998 A Crack Growth Approach to Life Estimation of Spot-Welded Lap Joints Fatigue and Fracture of Engineering Materials and Structures 21 1123 1132
- Lin, S.-.H Pan, J. Wung, P. Chiang, J. 2006 A Fatigue Crack Growth Model for Spot Welds in Various Types of Specimens under Cyclic Loading Conditions International Journal of Fatigue 28 792 803
- Lin, P.-C. Wang, D.-A. Pan, J. 2007 Mode I Stress Intensity Factor Solutions for Spot Welds in Lap-Shear Specimens International Journal of Solids and Structures 44 1013 1037
- Zhang, S. 1997 Stress Intensities at Spot Welds International Journal of Fracture 88 167 185
- Campbell, E.J. Gerberich, W.W. Underwood, J.H. 1982 Application of Fracture Mechanics for Selection of Metallic Structural Materials American Society for Metals Metals Parks, OH