Journal
COMPUTERS & STRUCTURES
Volume 82, Issue 23-26, Pages 2261-2269Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compstruc.2003.10.028
Keywords
gears; bending fatigue; service life; fatigue crack initiation; fatigue crack propagation; computational simulations
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A computational model for the determination of service life of gears with regard to bending fatigue in a gear tooth root is presented. The fatigue process leading to tooth breakage is divided into crack initiation (N-i) and crack propagation (N-p) periods, where the complete service life is defined as N = N-i + N-p. The strain-life method in the framework of the FEM method has been used to determine the number of stress cycles Ni required for fatigue crack initiation. Gear tooth crack propagation was simulated using a FEM method based computer program which uses principles of linear elastic fracture mechanics. The Paris equation is then used for the further simulation of the fatigue crack growth. The presented model is used to determine the service life of a real spur gear made from through-hardened steel 42CrMo4. (C) 2004 Civil-Comp Ltd. and Elsevier Ltd. All rights reserved.
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