Experimental study on the performance of superfinish hard turned surfaces in rolling contact

Agha, Salah R.; Liu, C.Richard

doi:10.1016/s0043-1648(00)00438-5

Cited by 76 publications

(53 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%

“…The nominal maximum contact pressure is taken as 1406 MPa [16] according to the DIN standard procedure [4]. [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].…”

Section: Validation Of the Deterministic Modelsmentioning

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 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%

Section: Validation Of the Deterministic Modelsmentioning

confidence: 99%

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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“…The residual stresses in the parts produced by hard machining have less variance than those in ground parts [3]. Therefore, in rolling contact fatigue tests, hard turned parts have shown better fatigue performance and higher repeatability compared with ground parts [4]. On the other hand, hard-turned surfaces machined in different cutting conditions have exhibited very different fatigue performances up to 50 times in terms of number of cycles under the same loading condition.…”

mentioning

confidence: 99%

On predicting chip morphology and phase transformation in hard machining

Shi

Liu

2005

Int J Adv Manuf Technol

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A finite element model is developed to predict the chip formation and phase transformation in orthogonal machining of hardened AISI 52100 steel (62HRC) using Polycristalline Cubic Boron Nitride (PCBN) tools. The model mainly includes a chip separation criterion based on critical equivalent plastic strain; a Coulomb's law for the friction at the tool/chip interface; a material constitutive relation of velocity-modified temperature; a thermal analysis incorporating the heat dissipated from inelastic deformation energy and friction; and an annealing effect model, in which the work hardening effect may be lost or re-accumulate depending on material temperature. This fully coupled thermalmechanical finite element analysis accurately simulates the formation of segmental chips and predicts the phase transformation on the chips, as verified by experiment. It is found that high temperatures around the secondary shear zone causes fast re-austenitization and martensite transformation, while other parts of the chips retain the original tempered martensitic structure.

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“…The composition of AISI 1053 steel is given in Table 1. Figure 1 shows the dimensions of the specimen, which were selected to minimize deflection by the chucking forces of a standard jaw and to be uniformly through hardened [17].…”

Section: Methodsmentioning

confidence: 99%

“…Agha and Liu [15] did an experimental study on the rolling contact fatigue performance of hard turned and ground surfaces. They found that the deterministic nature of hard turning results in more consistent repeatability of the rolling contact fatigue life.…”

Section: Introductionmentioning

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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Experimental study on the performance of superfinish hard turned surfaces in rolling contact

Cited by 76 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

On predicting chip morphology and phase transformation in hard machining

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

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