Robust gear designs consider not only crack initiation, but crack propagation trajectories for a fail-safe design. In actual gear operation, the magnitude as well as the position of the force changes as the gear rotates through the mesh. A study to determine the effect of moving gear tooth load on crack propagation predictions was performed. Two-dimensional analysis of an involute spur gear and three-dimensional analysis of a spiral-bevel pinion gear using the finite element method and boundary element method were studied and compared to experiments. A modified theory for predicting gear crack propagation paths based on the criteria of Erdogan and Sih [18] was investigated. Crack simulation based on calculated stress intensity factors and mixed mode crack angle prediction techniques using a simple static analysis in which the tooth load was located at the highest point of single tooth contact was validated. For three-dimensional analysis, however, the analysis was valid only as long as the crack did not approach the contact region on the tooth.
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March 2001
Technical Papers
Consideration of Moving Tooth Load in Gear Crack Propagation Predictions
David G. Lewicki,
David G. Lewicki
U.S. Army Research Laboratory, NASA Glenn Research Center, Cleveland, OH 44135
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Robert F. Handschuh,
Robert F. Handschuh
U.S. Army Research Laboratory, NASA Glenn Research Center, Cleveland, OH 44135
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Lisa E. Spievak,
Lisa E. Spievak
Cornell Fracture Group, Cornell University, Ithaca, NY 14853
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Paul A. Wawrzynek,
Paul A. Wawrzynek
Cornell Fracture Group, Cornell University, Ithaca, NY 14853
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Anthony R. Ingraffea
Anthony R. Ingraffea
Cornell Fracture Group, Cornell University, Ithaca, NY 14853
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David G. Lewicki
U.S. Army Research Laboratory, NASA Glenn Research Center, Cleveland, OH 44135
Robert F. Handschuh
U.S. Army Research Laboratory, NASA Glenn Research Center, Cleveland, OH 44135
Lisa E. Spievak
Cornell Fracture Group, Cornell University, Ithaca, NY 14853
Paul A. Wawrzynek
Cornell Fracture Group, Cornell University, Ithaca, NY 14853
Anthony R. Ingraffea
Cornell Fracture Group, Cornell University, Ithaca, NY 14853
Contributed by the Power Transmission & Gearing Committee for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received May 2000; revised Oct. 2000. Associate Editor: J. Gao.
J. Mech. Des. Mar 2001, 123(1): 118-124 (7 pages)
Published Online: October 1, 2000
Article history
Received:
May 1, 2000
Revised:
October 1, 2000
Citation
Lewicki , D. G., Handschuh , R. F., Spievak , L. E., Wawrzynek , P. A., and Ingraffea , A. R. (October 1, 2000). "Consideration of Moving Tooth Load in Gear Crack Propagation Predictions ." ASME. J. Mech. Des. March 2001; 123(1): 118–124. https://doi.org/10.1115/1.1338118
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