Mechanical Analysis of a Pin Interference-Fitted Sheet under Tensile Loading
Publication: Journal of Aerospace Engineering
Volume 29, Issue 4
Abstract
Interference fit can lead to better fatigue behavior of mechanical fastened joints. To explore the fatigue enhancement mechanism of interference fit, an analytical model of an interference-fit pinned sheet under subsequent tensile loading is presented. This model is employed to correlate the bypass load with the external longitudinal tensile load of the sheet, and the range of the two forces. Three-dimensional (3D) finite element (FE) analysis is performed using ABAQUS and comparison between the results of the two models shows a good agreement. Analytical results reveal that the key to the reduction of the bypass load amplitude lies in the elastic deformation of connected members of interference-fitted joints and the contact between them. This effect is accomplished through the automatic adjustment of the contact at the interfaces of the pin and sheet. For a specific joint, the effective affecting range (EAR) of interference for external loading is dependent on the interference and stiffness of its members. Specifically, the bypass load amplitude can be reduced only when external loads intersect EAR with a nonempty subset. If exerted loads are entirely within EAR, the bypass load amplitude can be minimized and the reduction ratio depends solely upon the stiffness of the connected members. It is also concluded that taking into consideration the external loads, especially its maximum value, is essential in the optimizing of interference. Finally, the optimum interference is deduced via the analytical model.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 51505447) and the Aeronautical Science Foundation of China (No. 2015ZE53065).
References
Brown, M. A., and Evans, J. L. (2012). “Fatigue life variability due to variations in interference fit of steel bushings in 7075-T651 aluminum lugs.” Int. J. Fatigue, 44(9), 177–187.
Buch, A. (1977). “Fatigue and fretting of pin-lug joints with and without interference fit.” Wear, 43(1), 9–16.
Camanho, P. P., and Lambert, M. (2006). “A design methodology for mechanically fastened joints in laminated composite materials.” Compos. Sci. Technol., 66(15), 3004–3020.
Cao, Z., and Cardew-Hall, M. (2006). “Interference-fit riveting technique in fiber composite laminates.” Aerosp. Sci. Technol., 10(4), 327–330.
Chakherlou, T., and Abazadeh, B. (2012). “Experimental and numerical investigations about the combined effect of interference fit and bolt clamping on the fatigue behavior of Al 2024-T3 double shear lap joints.” Mater. Des., 33, 425–435.
Chakherlou, T., Mirzajanzadeh, M., and Saeedi, K. (2010). “Fatigue crack growth and life prediction of a single interference fitted holed plate.” Fatigue Fract. Eng. Mater. Struct., 33(10), 633–644.
Chakherlou, T., Mirzajanzadeh, M., and Vogwell, J. (2009). “Experimental and numerical investigations into the effect of an interference fit on the fatigue life of double shear lap joints.” Eng. Fail. Anal., 16(7), 2066–2080.
Chakherlou, T., and Yaghoobi, A. (2010). “Numerical simulation of residual stress relaxation around a cold-expanded fastener hole under longitudinal cyclic loading using different kinematic hardening models.” Fatigue Fract. Eng. Mater. Struct., 33(11), 740–751.
Croccolo, D., De Agostinis, M., Ceschini, L., Morri, A., and Marconi, A. (2013). “Interference fit effect on improving fatigue life of a holed single plate.” Fatigue Fract. Eng. Mater. Struct., 36(7), 689–698.
Duprat, D., Campassens, D., Balzano, M., and Boudet, R. (1996). “Fatigue life prediction of interference fit fastener and cold worked holes.” Int. J. Fatigue, 18(8), 515–521.
Finney, J., and Evans, R. (1995). “Extending the fatigue life of multi-layer metal joints.” Fatigue Fract. Eng. Mater. Struct., 18(11), 1231–1247.
Guo, W., and Fu, X. (1991). “An analysis of the crack propagation life of the interference-fitted fastener.” Acta Aeronautica et Astronautica Sinica, 12(2), 106–111.
Hao, D., and Wang, D. (2013). “Finite-element modeling of the failure of interference-fit planet carrier and shaft assembly.” Eng. Fail. Anal., 33(7), 184–196.
Kiral, B. G. (2010). “Effect of the clearance and interference-fit on failure of the pin-loaded composites.” Mater. Des., 31(1), 85–93.
Kovan, V. (2011). “Separation frequency analysis of interference fitted hollow shaft-hub connections by finite element method.” Adv. Eng. Software, 42(9), 644–648.
Lanciotti, A., and Polese, C. (2005). “The effect of interference-fit fasteners on the fatigue life of central hole specimens.” Fatigue Fract. Eng. Mater. Struct., 28(7), 587–597.
Low, A. (1958). “The fatigue strength of pin-jointed connections in aluminium alloy BS L65.” Proc. Inst. Mech. Eng., 172(1), 821–838.
Mann, J., et al. (1983). “The use of interference-fit bolts or bushes and hole cold expansion for increasing the fatigue life of thick-section aluminium alloy bolted joints.” Aeronautical Research Labs, Melbourne, Australia.
Pradhan, B., and Babu, P. R. (2007). “Assessment of beneficial effects of interference-fit in pin-loaded FRP composites.” J. Reinf. Plast. Compos., 26(8), 771–788.
Sen, S., and Aksakal, B. (2004). “Stress analysis of interference fitted shaft-hub system under transient heat transfer conditions.” Mater. Des., 25(5), 407–417.
Thoppul, S. D., Finegan, J., and Gibson, R. F. (2009). “Mechanics of mechanically fastened joints in polymer-matrix composite structures: A review.” Compos. Sci. Technol., 69(3), 301–329.
Timoshenko, S. (1958). Strength of materials. Part II: Advanced theory and problems, Van Nostrand Reihnold, Melbourne, Australia.
Toupin, R. A. (1965). “Saint-Venant’s principle.” Arch. Ration. Mech. Anal., 18(2), 83–96.
Tu, W., Wen, P., and Guild, F. (2010). “Multi-region mesh free method for Comeld joints.” Comput. Mater. Sci., 48(3), 481–489.
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Published In
Journal of Aerospace Engineering
Volume 29 • Issue 4 • July 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jan 21, 2015
Accepted: Oct 9, 2015
Published online: Jan 4, 2016
Discussion open until: Jun 4, 2016
Published in print: Jul 1, 2016
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