Rolling contact fatigue life of finish hard machined surfaces

Choi, Youngsik; Liu, C. Richard

doi:10.1016/j.wear.2005.12.003

Cited by 41 publications

(26 citation statements)

References 10 publications

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“…Linear elastic fracture mechanics concepts have been used to estimate the crack propagation rate in several previous studies, [19,[26][27][28][29]. The driving force for subsurface crack propagation in rolling contacts and shown experimentally depend on the hardness and the maximum shear stress [27,30].…”

Section: Linear Elastic Fracture Mechanics Modelmentioning

confidence: 99%

“…Choi and Liu [29,32] used this model to estimate the contact fatigue life of bearings and compared it with experimental results. The model is given as follows:…”

Section: Stress Intensity Factor Calculationmentioning

confidence: 99%

“…[26]. The initial crack is assumed to be parallel to the surface and its half length is taken as a 0 = 12.5 lm [16] at a depth H = 0.1432 mm under the contact surface, where the cracks are assumed to initiate at the point where the ratio of the maximum shear stress to hardness is greatest [19,29,32,42,43]. Fig.…”

Section: Validation Of the Deterministic Modelsmentioning

confidence: 99%

See 2 more Smart Citations

Time domain-based gear contact fatigue analysis of a wind turbine drivetrain under dynamic conditions

Dong

Xing

Moan

et al. 2013

International Journal of Fatigue

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a b s t r a c tThis paper presents a general approach to predict the contact fatigue life of the gears in the drive-train system of a wind turbine under dynamic conditions. A simplified predictive pitting model that estimates service lives is presented and validated by comparisons with published experimental evidence. Finally, the predictive model is used to estimate the contact fatigue lives of the sun gear and planetary gears in the drive-train system of the National Renewable Energy Laboratory's 750 kW land-based wind turbine based on time domain simulations. The occurrence frequencies of different wind speeds are described by the generalized gamma distribution. The time series of the torques in the main shaft are obtained from a global dynamic response analysis of the wind turbine. The time series of the gear contact forces is obtained from a dynamic analysis of the gearbox using multi-body simulation. The two-parameter Weibull distribution, the three-parameter Weibull distribution, and the generalized-gamma distribution are used to fit the long-term probabilistic distribution of the gear tooth contact pressures. The case study shows the validity of the approach presented in this paper.

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Section: Linear Elastic Fracture Mechanics Modelmentioning

confidence: 99%

“…Choi and Liu [29,32] used this model to estimate the contact fatigue life of bearings and compared it with experimental results. The model is given as follows:…”

Section: Stress Intensity Factor Calculationmentioning

confidence: 99%

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Time domain-based gear contact fatigue analysis of a wind turbine drivetrain under dynamic conditions

Dong

Xing

Moan

et al. 2013

International Journal of Fatigue

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“…A layer of 100 lm thickness was then removed by an etching to remove a thermally damaged layer. The thickness of removed layer by an etching was determined based on previous research [18].…”

Section: Machining Conditionsmentioning

confidence: 99%

A Comparative Study of Residual Stress Distribution Induced by Hard Machining Versus Grinding

Choi

2009

Tribol Lett

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This study investigates the residual stress distribution induced by hard machining and grinding and compares its impact on fatigue parameters. The residual stress distribution below hard turned and ground surfaces is investigated after a thermally damaged layer is removed. Fatigue parameters are computed based on the residual stress distribution to compare the impact of the residual stress distribution on the fatigue performance. Rolling contact fatigue tests are then performed to substantiate the computations. The effect of residual stresses on crack initiation depth is shown to be significant for the ground specimen. The maximum shear stress at crack initiation depth of the hard turned specimen is smaller than that of the ground specimen. Due to a significant increase in crack initiation life, the predicted rolling contact fatigue life of the hard turned specimen is longer than that of the ground specimen. The overall average in the ratios of predicted life to experimental life for the hard turned specimen is closer to 1 than that for the ground specimen. The results demonstrate that the hard turned specimen shows better rolling contact fatigue performance and better accuracy in the fatigue life prediction.

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“…For the relevant cases with high wheel speeds, the surface roughness was of sufficient quality. Residual stresses in particular affect the rolling contact fatigue life through both mechanisms, changing the crack initiation life and the crack propagation life [28]. Fatigue characteristics are a prime consideration in determining component failure under dynamic loading and cyclical stresses [29].…”

mentioning

confidence: 99%

Higher Competitiveness of Speed-Stroke Grinding by Using Increased Wheel Speeds

Duscha

Linke

Klocke

et al. 2012

ASME 2012 International Manufacturing Science and Engineering Conference

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Production engineering faces the challenge to satisfy the increasing industrial demand for higher productivity and high requirements on workpiece quality at the same time. Furthermore, the rising environmental awareness adds additional constraints. Especially grinding processes have high relevance for industrial applications because they generate high quality surfaces and they are most effective for hard-tomachine materials. New technologies like speed-stroke grinding and high cutting speeds enable higher productivity. However, to be competitive to conventional grinding operations energy aspects have to be regarded thoroughly. This work shows how the combination of speed-stroke grinding and high speed machining can boost process performance, workpiece quality and process sustainability.

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Rolling contact fatigue life of finish hard machined surfaces

Cited by 41 publications

References 10 publications

Time domain-based gear contact fatigue analysis of a wind turbine drivetrain under dynamic conditions

Time domain-based gear contact fatigue analysis of a wind turbine drivetrain under dynamic conditions

A Comparative Study of Residual Stress Distribution Induced by Hard Machining Versus Grinding

Higher Competitiveness of Speed-Stroke Grinding by Using Increased Wheel Speeds

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