Numerical investigation of the spall opening angle of surface initiated rolling contact fatigue

Hannes, Dave; Alfredsson, Bo

doi:10.1016/j.engfracmech.2014.09.010

Cited by 10 publications

(3 citation statements)

References 36 publications

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“…The initiation site of RCF damage may be situated below, or on, the contact surface. The former case is designated as sub-surface RCF, with initiation sites at sub-surface defects, resulting in fairly irregularly shaped craters or spalls in the contact surface [7]. The latter case is called surface initiated RCF, and the basic features of surface induced spalling damage are arrow-shape, opening in the rolling direction, and crack initiation at the apex [8].…”

Section: Introductionmentioning

confidence: 99%

The Tribo-Fatigue Damage Transition and Mapping for Wheel Material under Rolling-Sliding Contact Condition

Liu

Wang

et al. 2019

Materials

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The purpose of this work is to construct a tribo-fatigue damage map of high-speed railway wheel material under different tangential forces and contact pressure conditions through JD-1 testing equipment. The results indicate that the wear rate of the wheel material varies with tangential force and contact pressure. The wear mapping of the wheel material is constructed and divided into three regions: slight wear, severe wear, and destructive wear, based on the wear rate under each test condition. With an increase in tangential force and contact pressure, the maximum crack length and average crack length of the wheel material increases. According to the surface damage morphologies and corresponding statistical results of average crack length of wheel material under each experiment condition, a tribo-fatigue damage map is constructed and divided into three regions: slight fatigue damage region, fatigue damage region, and severe fatigue damage region. Fatigue cracks initiate on the wheel specimen surface. Some cracks may propagate into material and fracture under cyclic rolling contact; some cracks may grow into inner material with a certain depth, and then turn toward the surface to form material flaking; some cracks may always propagate parallel to the wheel roller surface.

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Section: Introductionmentioning

confidence: 99%

The Tribo-Fatigue Damage Transition and Mapping for Wheel Material under Rolling-Sliding Contact Condition

Liu

Wang

et al. 2019

Materials

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“…They found that the crack behaviour can be predicted with respect to crack growth direction in the rolling cross-section [7], i.e. the pitting entry angle β [7], the pitting life [8] and [9], and the surface view opening angle αpit [10], of the archetypical sea-shell shaped pit crater exemplified in Fig. 1a.…”

Section: Introductionmentioning

confidence: 99%

“…For dry conditions they concluded that the tensile stresses in front of the asperity are sufficiently large to initiate fatigue. Hannes and Alfredsson performed a series of fracture mechanical investigations [7], [8], [9] and [10] on the surface crack growth behaviour by the combined asperity and rolling cylinder contact load. They found that the crack behaviour can be predicted with respect to crack growth direction in the rolling cross-section [7], i.e.…”

Section: Introductionmentioning

confidence: 99%

Contact fatigue initiation and tensile surface stresses at a point asperity which passes an elastohydrodynamic contact

Everitt

Alfredsson

2018

Tribology International

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Contact mechanics and tribology was combined with fundamental fatigue and fracture mechanics to form a new mechanism for surface initiated rolling contact fatigue. Following, fatigue was investigated numerically for single asperities and craters in lubricated rolling contact surfaces. The hypothesis suggests that asperity point contacts can create sufficiently large tensile stresses for fatigue. The investigated case corresponded to a heavily loaded truck gear with ground surfaces. Reynolds equation resolved the elastohydrodynamic effect of the asperity in the transient three dimensional contacts. The Findley critical plane criterion was used for multiaxial and non-proportional fatigue evaluation. The simulations confirmed the new mechanism for rolling contact fatigue and showed how asperities can create contact fatigue in the lubricated contacts even without slip.

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Calculation Model for Estimation of Cyclic Contact Lifetime of Body with Cracks

Datsyshyn

Panasyuk

2019

Structural Integrity

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Numerical investigation of the spall opening angle of surface initiated rolling contact fatigue

Cited by 10 publications

References 36 publications

The Tribo-Fatigue Damage Transition and Mapping for Wheel Material under Rolling-Sliding Contact Condition

The Tribo-Fatigue Damage Transition and Mapping for Wheel Material under Rolling-Sliding Contact Condition

Contact fatigue initiation and tensile surface stresses at a point asperity which passes an elastohydrodynamic contact

Calculation Model for Estimation of Cyclic Contact Lifetime of Body with Cracks

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