Critical stresses in rolling contact fatigue

Popinceanu, N.G.; Diaconescu, Emanuel; Creţu, S.

doi:10.1016/0043-1648(81)90225-8

Cited by 37 publications

(30 citation statements)

References 30 publications

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“…The fatigue life of rolling element bearings is heavily influenced on the contact geometry where fatigue tests have shown that for the same maximum Hertzian pressure, longer fatigue life is achieved when the contact area ratio b a increases [80][81][82]. Popinceanu et al [83] observed that when b a increases, the orthogonal stress and von Mises stress decrease and therefore concluding τ 0 be the most influential of the stress components since the fatigue life can be enhanced by reducing the orthogonal stress. Increasing the b a ratio would reduce the stressed volume of the material which would increase the fatigue life based on the Lundberg-Palmgren equation [62].…”

Section: Hertzian Contact Theorymentioning

confidence: 99%

Further understanding of rolling contact fatigue in rolling element bearings - A review

Laithy

Wang

Harvey

et al. 2019

Tribology International

115

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Rolling bearings are one of the most widely used components in industrial machinery. If suitably mounted, loaded, lubricated and isolated from contamination, rolling contact fatigue (RCF) is believed to be the most probable mode of failure resulting in subsurface originated failures. Over the past several decades many researchers have studied the failure and microstructural alterations in bearings such as dark etching regions and white etching bands and how operating conditions such as pressure, temperature and running time impact them during RCF. This paper aims to provide an overview of such alterations, their properties, formation mechanisms and impact on bearing failure.

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Section: Hertzian Contact Theorymentioning

confidence: 99%

Further understanding of rolling contact fatigue in rolling element bearings - A review

Laithy

Wang

Harvey

et al. 2019

Tribology International

115

View full text Add to dashboard Cite

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“…Voskamp and Mittemeijer [18] concluded that applying a general state of compressive residual stresses improves the fatigue life of bearings through suppressing the possibility of yielding. Popinceanu et al [19] compared different hypotheses regarding the critical stresses in rolling contact fatigue and concluded that von Mises stress is appropriate for evaluating the effect of residual stresses on fatigue life as it takes into account all components of the stress field. Bhargava, et al [20], Bower and Johnson [21], and Howell, et al [22] were among the first researchers who developed finite element models for rolling contact taking the effect of residual stresses into account.…”

Section: Introductionmentioning

confidence: 99%

Determination of optimal residual stress profiles for improved rolling contact fatigue resistance

2019

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A theoretical framework is developed for the evaluation of favorable residual stress profiles, suppressing fatigue damage initiation in rolling contact fatigue. Non-metallic inclusions at the microstructure of bearings are one of the most important reasons for fatigue damage initiation since they act as stress risers. In order to evaluate the stress state around such inclusions at the micro-scale, macroscopic stress histories are determined by Hertzian contact theory at different depths below the raceway for a typical roller bearing. These stress distributions are then used as far-field stresses for a micro-scale model accounting for single inclusions of different geometries and orientations. Eshelby's method is used to relate far-field and local stresses in the vicinity of inclusions. The von Mises stress criterion is then used as a conservative estimator of crack initiation due to micro-scale plasticity. The effect of compressive residual stresses added to the axial and circumferential normal stress components at different depths is analyzed. The von Mises stress field around different inclusions at different depths is investigated in order to determine the most critical case in terms of microscale plastic deformation. Finally, an optimization process is carried out in order to determine the residual stresses that minimize the maximum observed von Mises stress as a function of depth.

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“…Since then, the Palmgren and Lundberg evaluation methods have been modified by later researchers. [3][4][5][6][7][8][9] Note especially that Ioannides & Harris 9 took into consideration the idea of 'fatigue' in their methods. However, all of these approaches have some limitations, the most important of which are that they do not take into consideration stress intensity factors for estimating 'fatigue limits' and 'surface crack propagation'.…”

Section: Introductionmentioning

confidence: 99%

Crack initiation from micro surface holes in bearings under rolling contact fatigue

Kida

Yamazaki

Shibata

et al. 2004

Fatigue Fract Eng Mat Struct

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A B S T R A C T Investigations concerning surface crack growth are necessary for understanding the mechanism of rolling contact fatigue (RCF) of bearings because the surface defects cause flaking failures. In the present work, micro holes were artificially made prior to the RCF tests and the initiation of the surface cracks from the micro holes was observed in order to find the key factors for understanding their features. Crack initiation directions were compared to the stress intensity factors calculated by a simple method based on the √ area theory. The extent to which 'contact pressure (wedge effect)' and 'contact stresses' are applicable for understanding the correlations between the crack initiation directions and stress intensity factors is discussed. The crack initiation directions are strongly correlated to the stress intensity factors caused by the contact stresses alone. We concluded that the crack growth and initiation are dominated by stress intensity factors caused by contact stresses rather than the wedge effect. F = correlation factor of the stress intensity factor caused by fluid pressure (contact pressure) Hv = Vicker's hardness K I = K I f − K I cs, K I under both effects of fluid pressure (contact pressure) and contact stress in the substrate K I f = K I caused by fluid pressure (contact pressure in wedge effect) K I c = fracture toughness K I cs = K I caused by contact stress K I max = maximum value of K I calculated by √ area method K σ = stress intensity factor calculated by tensile stress (contact stress) K σ max = maximum value of K σ while a ball passes over the hole at the hole edge along α direction K τ α = stress intensity factor calculated by τ α K τ z = stress intensity factor calculated by τ z S = distance of the hole from the contact center t = location of micro hole α = crack initiation angle K th = threshold value of stress intensity factor range in mode I K II th = threshold value of stress intensity factor range in mode II

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Critical stresses in rolling contact fatigue

Cited by 37 publications

References 30 publications

Further understanding of rolling contact fatigue in rolling element bearings - A review

Further understanding of rolling contact fatigue in rolling element bearings - A review

Determination of optimal residual stress profiles for improved rolling contact fatigue resistance

Crack initiation from micro surface holes in bearings under rolling contact fatigue

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