A tribo-dynamic contact fatigue model for spur gear pairs

Li, Sheng; Anisetti, Anusha

doi:10.1016/j.ijfatigue.2017.01.020

Cited by 69 publications

(34 citation statements)

References 44 publications

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“…Representative achievements were made by Xu and Sadeghi [18], Zhu and Ai [19], Jiang et al [20], Sicuteri and Salant [21], Hu and Zhu [22], Holmes et al [23], Bayada et al [24], Zhu et al [25,26], et al The developed mixed EHL model has been implemented in the subsurface stress-based fatigue-life model proposed by Zaretsky [12] as an effective approach for pitting fatigue analysis, as reported by Ai [15], Epstein et al [16], Zhu et al [17], Greco et al [27], and Pu et al [7]. Similar combinations of fatigue model and mixed EHL were also applied by Li and Kahraman [28], Li and Anisetti [29], et al Modifications to the mixed EHL model have been attempted in Refs. [30] and [31] to simulate the mixed EHL elliptical contacts with arbitrary velocity vectors by considering the effect of 3D roughness.…”

Section: Introductionmentioning

confidence: 96%

Microstress cycle and contact fatigue of spiral bevel gears by rolling-sliding of asperity contact

Cao

Ren

et al. 2020

Friction

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The rolling contact fatigue (RCF) model is commonly used to predict the contact fatigue life when the sliding is insignificant in contact surfaces. However, many studies reveal that the sliding, compared to the rolling state, can lead to a considerable reduction of the fatigue life and an excessive increase of the pitting area, which result from the microscopic stress cycle growth caused by the sliding of the asperity contact. This suggests that fatigue life in the rolling-sliding condition can be overestimated based only on the RCF model. The rubbing surfaces of spiral bevel gears are subject to typical rolling-sliding motion. This paper aims to study the mechanism of the micro stress cycle along the meshing path and provide a reasonable method for predicting the fatigue life in spiral bevel gears. The microscopic stress cycle equation is derived with the consideration of gear meshing parameters. The combination of the RCF model and asperity stress cycle is developed to calculate the fatigue life in spiral bevel gears. We find that the contact fatigue life decreases significantly compared with that obtained from the RCF model. There is strong evidence that the microscopic stress cycle is remarkably increased by the rolling-sliding motion of the asperity contact, which is consistent with the experimental data in previous literature. In addition, the fatigue life under different assembling misalignments are investigated and the results demonstrate the important role of misalignments on fatigue life.

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Section: Introductionmentioning

confidence: 96%

Microstress cycle and contact fatigue of spiral bevel gears by rolling-sliding of asperity contact

Cao

Ren

et al. 2020

Friction

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“…These results indicate that common assumptions about crack initiation from pits in shot peened steel can be misleading. Li and Anisetti proposed a contact fatigue model for spur gears operating under a high speed condition where dynamic behavior is evident [3]. A comparison between tribodynamic and quasi-static life predictions is performed to demonstrate the important role of gear tribodynamics in the fatigue damage.…”

Section: Introductionmentioning

confidence: 99%

Elastohydrodynamic Lubrication Characteristics of Spiral Bevel Gear Subjected to Shot Peening Treatment

Zhang

Jin

et al. 2018

Mathematical Problems in Engineering

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High speed and heavy load put forward demanding requirements for the bending strength of spiral bevel gear. Shot peening, as a technological method, can greatly improve the bending strength of gear. During shot peening, a large number of subtle projectiles bombard the tooth surface of spiral bevel gear at an extremely high speed, which makes the latter produce plastic deformation and strengthened layer. Serving as the bombarded target, spiral bevel gear inevitably leads to the change of tooth surfaces microstructure. This paper aims at revealing the coupling law between microstructure and lubrication characteristics and establishing a reasonable model that can describe the tooth surface microstructure of shot peened spiral bevel gear. Besides, this paper brings insight into the lubrication characteristics of shot peened spiral bevel gears. Based on the elastohydrodynamic lubrication (EHL) theory, a comparative research on tooth surface lubrication characteristics has been conducted by various microscopic morphologies in this study.

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“…The stress concentration region is the initiation point of a failure or fracture of the gear tooth [3]. Several recent researches [4][5][6][7] have concentrated on using the FE approach to determine the stress concentrations on the spur gear tooth. Hassan [4] developed a program which uses superposition mode calculation of meshing teeth to determine the contact stresses.…”

Section: Introductionmentioning

confidence: 99%

“…The results agree well which indicates the reliability of both methods. Contact stress and its behavior is very important in the evaluation of pitting and surface failure [5]. The stress concentrations generated due to misalignments influence the gear tooth contact stresses significantly.…”

Section: Introductionmentioning

confidence: 99%

Frictional stress analysis of spur gear with misalignments

Eng¹,

Karuppanan²,

Patil³

2018

J. MECH. ENG. SCI.

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Misalignments in gears cause vibrations and contact nonlinearities, which in turn cause load distribution shift on the gear tooth. The load distribution shift of the gear pair results in increased contact and bending stresses with the maximum stresses leaning towards the edge of the face width. These stress changes cause failures and gear performance variations, such as pitting, scuffing, crack initiation and eventually tooth breakage. In this paper, the contact and bending stresses of a misaligned spur gear pair were evaluated with and without friction by employing corresponding analytical methods and finite element method (FEM). Friction coefficient values of 0.1 to 0.3 were used to evaluate the effects of friction on contact and bending stress distribution of a spur gear pair with axial and angular misalignments. The stress concentration was found to be higher at the contact point and at the tooth root of the gear with the augmentation of the misalignment distance and angle. The maximum contact and bending stresses increased by 67.5% and 18.9%, respectively, when axial misalignments were subjected. Similarly, the maximum contact and bending stresses increased by 27.0% and 62.4%, respectively, for angular misalignments. Furthermore, the contact and bending stresses increased proportionally with the increasing coefficient of friction. Finally, the relationships between the normalized stress and misalignments (both axial and angular) were established.

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A tribo-dynamic contact fatigue model for spur gear pairs

Cited by 69 publications

References 44 publications

Microstress cycle and contact fatigue of spiral bevel gears by rolling-sliding of asperity contact

Microstress cycle and contact fatigue of spiral bevel gears by rolling-sliding of asperity contact

Elastohydrodynamic Lubrication Characteristics of Spiral Bevel Gear Subjected to Shot Peening Treatment

Frictional stress analysis of spur gear with misalignments

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