A variable amplitude fretting fatigue life estimation technique: Formulation and experimental validation

Kouanga, C.T.; Jones, Justin Daniel; Revill, I.; Wormald, A.; Nowell, D.; Dwyer-Joyce, R.S.; Susmel, Luca

doi:10.1016/j.triboint.2022.108055

Cited by 3 publications

(1 citation statement)

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“…with the amplitude u A and angular frequency ω 2 of the tangential oscillation. Note that in the recent literature variable amplitude fretting oscillations have also been considered ( [23,24]). This would in principle be possible to analyze within the framework described in the present manuscript but would too significantly extend the relevant parameter space.…”

Section: Problem Statementmentioning

confidence: 99%

Smith–Watson–Topper Parameter in Partial Slip Bimodal Oscillations of Axisymmetric Elastic Contacts of Similar Materials: Influence of Load Protocol and Profile Geometry

Willert

2024

Eng

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Based on a very fast numerical procedure for the determination of the subsurface stress field beneath frictional contacts of axisymmetric elastic bodies under arbitrary 2D oblique loading, the contact mechanical influences of loading parameters and contact profile geometry on the Smith–Watson–Topper (SWT) fatigue crack initiation parameter in elastic fretting contacts with superimposed normal and tangential oscillations are studied in detail. The efficiency of the stress calculation allows for a comprehensive physical analysis of the multi-dimensional parameter space of influencing variables. It is found that a superimposed normal oscillation of the contact can significantly increase or decrease the SWT parameter, depending on the initial phase difference and frequency ratio between the normal and tangential oscillation. Written in proper non-dimensional variables, the rounded flat punch always exhibits smaller values of the SWT parameter, compared to a full paraboloid with the same curvature, while the truncated paraboloid exhibits larger values. A small superimposed profile waviness also significantly increased or decreased the SWT parameter, depending on the amplitude and wave length of the waviness. While both the load protocol and the profile geometry can significantly alter the SWT parameter, the coupling between both influencing factors is weak.

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Section: Problem Statementmentioning

confidence: 99%