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Numerical Investigation on Optimizing Fatigue Life in a Lap Joint Structure
Abstract:Riveting process is one of the important ways to keep fastening the lap joints in aircraft structures. Failure of aircraft lap joints directly depends on the stress field in the joint. An important application of riveting process is in the construction of aircraft fuselage structures. In this paper, a 3D finite element method is carried out in order to optimize residual stress field in a riveted lap joint and also to estimate its fatigue life. In continue, a number of experiments are designed and analyzed using design of experiments (DOE). Then, Taguchi method is used to select an optimized case between different levels of each factor. Besides that, the factor which affects the most on residual stress field is investigated. Such optimized case provides the maximum residual stress field. Fatigue life of the optimized joint is estimated by Paris-Erdogan law. Stress intensity factors (SIFs) are calculated using both finite element analysis and experimental formula. In addition, the effect of residual stress field, geometry and secondary bending are considered in SIF calculation. A good agreement is found between results of such methods. Comparison between optimized fatigue life and fatigue life of other joints has shown an improvement in the joint’s life.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1107419Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1776
 S.H. Cheraghi, Effect of variations in the riveting process on the quality of riveted joints. Int J Adv Manuf Technol 2008: 39: 1144-1155.
 R.P.G. Muller. An experimental and analytical investigation on the fatigue behavior of fuselage riveted lap joints. PhD thesis, Delft University of Technology, Delft, The Netherlands: 1995.
 N.E. Frost, K.J. Marsh, L.P. Pook, Metal fatigue. Oxford University Press, London, 1974.
 A. Trego, D. Cope, Evaluation of damage tolerance analysis tools for lap joints. AIAA Journal 2001: 39(12): 2250-2254.
 C. Ranse, P.V. Straznicky, Riveting process induced residual stresses around solid rivets in mechanical joints. Journal of Aicraft 2007: 44(1): 323-329.
 K. Iyer, C.A. Rubin, G.T. Hahn, Three-dimensional analysis of single rivet row lap joints-part I: Elastic-Plastic response. Recent Adv Solids Struct 1999: 398: 41-57.
 Z. Kaifu, C. Hui, L. Yuan, Riveting process modeling and simulating for deformation analysis for aircraft’s thin-walled sheet-metal parts. Chinese Journal of Aeronautics 2011: 24: 369-377.
 M.R. Urban, Analysis of the fatigue life of riveted sheet metal helicopter airframe joints. International Journal of Fatigue 2003: 25: 1013-1026.
 C.P. Fung, Smart J., Riveted single lap joints. Part 1: Fatigue life prediction. Proceedings of the institution of mechanical engineers, part G (Journal of Aerospace Engineering) 1997: 211(1): 13-27.
 C.P. Fung, Smart J., Riveted single lap joints. Part 2: A numerical parametric study. Proceedings of the institution of mechanical engineers, part G (Journal of Aerospace Engineering) 1997: 211(2): 123-128.
 X. Deng, J.W. Hutchinson, The clamping stress in a cold driven rivet. International Journal of Mechanical Sciences 1998: 40(7): 683-694.
 M.P. Szolwinski, T.N. Farris, Linking riveting process parameters to the fatigue performance of riveted aircraft structures. Journal of Aircraft 2000: 37(1): 130-137.
 P.M.G.P. Moreira, P.F.P. de Matos,S.T. Pinho, D. Pastrama, P.P. Camanho, P.M.S.T. de Castro, The residual stress intensity factors for cold-worked cracked holes: A technical note. Fatigue and Fracture of Engineering Materials and Structures 2004: 27(9): 879-886.
 J.J.M Rijck, J.J. Homan, J. Schijve, R. Benedictus, The driven rivet head dimensions as an indication of the fatigue performance of aircraft lap joints. International Journal of Fatigue 2007: 29: 2208-2218.
 H.K. Yoon, S.P. Lee, B.H. Min, S.W. Kim, Y. Katoh, A. Kohyama. Fatigue life and fatigue crack propagation behavior of JLF-1 steel. Fusion Engineering and Design 2002: 61: 677-682.
 P.C. Paris, F. Erdogan, A critical analysis of crack propagation laws. Transactions ASME Journal of Basic Engineering 1963: 85: 528-534.
 J.L Beuth, J.W. Hutchinson, Fracture analysis of multi-site cracking in fuselage lap joints, Computational Mechanics 1994:13: 315-331.
 J.J.M. Rijck, S.A. Fawaz, Schijve J., Benedictus R., Homan J.J., Stress analyses of mechanically fastened joints in aircraft fuselages, 24th ICAF Symposium, Naples, 2007.