Computational model for analysis of bending fatigue in gears
Pages 171 - 172
Abstract
A computational model for determination of service life of gears in regard to bending fatigue in a gear tooth root is presented. The fatigue process leading to tooth breakage is divided into crack initiation (Ni) and crack propagation (Np) period, where the complete service life is defined as N=Ni+Np . The strain-life method in the framework of the FEM method has been used to determine the number of stress cycles Ni required for the fatigue crack initiation. Gear tooth crack propagation was simulated using a FEM method based computer program which uses principles of linear elastic fracture mechanics. Paris equation is then used for the further simulation of the fatigue crack growth. The presented model is used for determination of service life of real spur gear made from through-hardened steel 42CrMo4.
References
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[2]
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{9} Blarasin A., Guagliano M. and Vergani L., "Fatigue crack growth prediction in specimens similar to spur gear teeth", Fatigue Fract. Engng Mater. Struct., 20, 1171-1182, 1997.
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{11} Guagliano M., Vergani L., "Effect of crack closure on gear crack propagation", International Journal of Fatigue, 23, 65-73, 2001.
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{17} ASTM E 399-80, "American standard".
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{18} FRANC2D, "User's Guide", Version 2.7, Cornell University, 1998.
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{19} Abersek B., "Analysis of short fatigue crack on gear teeth", Ph.D. thesis, University of Maribor, Faculty of Mechanical Engineering, Maribor, 1993.
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{20} Niemann G. and Winter H., "Maschinenelemente - Band II", Springer Verlag, 1983.
Index Terms
- Computational model for analysis of bending fatigue in gears
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Civil-Comp press
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Published: 04 September 2002
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