Evaluation of bending fatigue strength in automotive gear steel subjected to shot peening techniques.

Lambert, Robert; Aylott, Chris; Shaw, Brian

doi:10.1016/j.prostr.2018.12.329

Cited by 14 publications

(3 citation statements)

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“…defects and inclusions), some efforts have been made to evaluate the fatigue life of gears during the past years. For instance, through a large number of fatigue tests for gears, the fatigue strength of gears affected by the material mechanical properties was investigated 4,5 . Numerical analysis was carried out to study the effects of material microstructures on the fatigue life of wind turbine gears based on the material exposure concept, 6 elastic–plastic continuous damage theory 7,8 and multiaxial fatigue criteria 9 .…”

Section: Introductionmentioning

confidence: 99%

“…For instance, through a large number of fatigue tests for gears, the fatigue strength of gears affected by the material mechanical properties was investigated. 4,5 Numerical analysis was carried out to study the effects of material microstructures on the fatigue life of wind turbine gears based on the material exposure concept, 6 elastic-plastic continuous damage theory 7,8 and multiaxial fatigue criteria. 9 Kitagawa and Takahashi 10 paid their attention to the fatigue failure of gear materials due to small cracks, the fatigue threshold behaviour of small crack had been characterized and the results indicated that the fatigue threshold declines with decreasing of crack size.…”

Section: Introductionmentioning

confidence: 99%

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Fatigue life analysis of wind turbine gear with oxide inclusion

Liu

Sun

Hou

et al. 2020

Fatigue Fract Eng Mat Struct

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Considering a great deal of wind turbine gear failure cases, it is shown that the oxide inclusion has been one of the main reasons for the failure of the gear shaft under fatigue loading condition. In this paper, the fatigue behaviour of gears involving oxide inclusion under real operating condition is investigated. A three-dimensional finite element model for helical gear pair applied in the middle stage of wind power increasing gearbox is established, and the fatigue life of nonmetallic inclusion zone of middle gear shaft is predicted using Miner's theory and real load spectrum of wind power growth gearbox. Then, the effects of several factors (such as the size and position of oxide inclusion and residual stress induced by manufacturing) on the fatigue life of gears with inclusion are studied. The results show that both inclusion size and position have great influence on the fatigue life of gears, and the compress residual stress will prolong the fatigue life of gears. Furthermore, the critical safety line and safety region of gears with oxide inclusion have been obtained for three representative inclusion positions. The present work is expected to provide a guidance for the engineering design and life safety evaluation of wind turbine gears.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fatigue life analysis of wind turbine gear with oxide inclusion

Liu

Sun

Hou

et al. 2020

Fatigue Fract Eng Mat Struct

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“…Residual stress greatly influences the fatigue strength, stress corrosion, and shape accuracy of the parts. In recent years, many scholars have used different principles and methods to conduct studies pertaining to residual stress, including the measurement and calculation of residual stress, analyses of residual stresses in key parts during service, and analyses of residual stresses in new materials and new technology [2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Residual Stress and Bending Strength of Gear Tooth Surface after Shot Peening Treatment

Liang

Meng

Chen

et al. 2020

Shock and Vibration

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The fatigue strength of a gear tooth surface is affected by various factors, which subsequently impacts the transmission performance of gears. Usually, shot peening treatment is carried out during processing to improve the performance of gears. Most current studies focus on theoretical descriptions and simulation analyses of shot peening treatment. However, in this paper, the relationships among shot peening treatment, residual stress, and bending fatigue strength of a gear tooth surface are discussed, through experimental methods. Based on X-ray stress analysis, at select locations on the test samples, the residual stresses on gear tooth surfaces with and without shot peening treatment are determined and contrasted. The results show that shot peening treatment can effectively increase the residual stress on gear tooth surfaces. In addition, an electromagnetic resonance fatigue tester is used to analyze the bending fatigue strength of gear tooth surfaces. The test results indicate that the bending fatigue strength of the gear teeth with shot peening is higher than that of the gear teeth without shot peening. The obtained conclusions lay the foundation for further practical engineering applications of gears.

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