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- W1593786781 abstract "Similar to most engineering models, the AGMA standard for gear contact fatigue life calculation was developed based on the data fitting of experimental data. The accuracy of the standard is limited by its empirical nature and it offers no explanation about gear spalling mechanisms. Therefore, finding an analytical model to accurately predict the gear contact fatigue process and life has been an ultimate goal for researchers. In resent years many fracture mechanics based gear contact fatigue models were developed using an assumption that gear spalling was caused by surface crack initiation and propagation. But in our contact fatigue test of helical gears, massive surface cracks and pits were found at the very early stage of the tests but none of them propagated into spalls. In this work we used a roller test machine to study the spalling mechanism of spur gears. Similar to our helical gear test, we could not trace the origin of a spall from the large surface cracks and pits. Since all of our test results did not support the surface crack initiation and propagation theory, we assumed that gear spalling was the result of subsurface crack initiation and propagation. Then we used a micromechanics based crack initiation model to predict the spalling life of spur and helical gears. The new model physically explains how a subsurface crack is initiated and the influence of material properties on gear spalling life." @default.
- W1593786781 created "2016-06-24" @default.
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- W1593786781 date "2001-01-01" @default.
- W1593786781 modified "2023-09-27" @default.
- W1593786781 title "Semi-analytical modeling of spalling life of spur and helical gears" @default.
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- W1593786781 doi "https://doi.org/10.1016/s0167-8922(01)80142-5" @default.
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