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An Analytical Solution for the Initiation and Early Progression of Fretting Wear in Spherical Contacts

Journal Article · · Journal of Tribology
DOI:https://doi.org/10.1115/1.4051585· OSTI ID:1980659
 [1];  [2]
  1. G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332; OSTI
  2. G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332
Abstract

This article derives analytical solutions to calculate the wear volume at the initiation of fretting motion and its early progression over the first few oscillation cycles. The Archard-based model considers a deformable hemisphere that is contact with a deformable flat block. The material pairs investigated are special alloys, the Inconel 617/Incoloy 800H, and Inconel 617/Inconel 617. The analytical study begins with a unidirectional frictional sliding contact, where the local interfacial sliding distance and the nominal sliding distance at the initiation of gross slip are derived. The obtained analytical expressions for unidirectional sliding are then used to derive the corresponding wear volume for the initiation and early progression of gross slip and the wear volume for a general fretting cycle under elastic conditions. These analytical derivations are all verified by the finite element analysis (FEA). The FEA method and the analytical solutions render virtually identical results for both similar and dissimilar material pairs. The effects of plasticity on the wear volume under elastic–plastic conditions are also investigated. It is found that the fretting wear volumes obtained from the FEA simulations, which include plasticity, are close to those obtained from the analytical expressions for purely elastic regimes. All the results are presented in normalized forms, which can be easily generalized and applied to three-dimensional fretting wear of other material pairs.

Research Organization:
Georgia Institute of Technology, Atlanta, GA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
SC0018369
OSTI ID:
1980659
Journal Information:
Journal of Tribology, Journal Name: Journal of Tribology Journal Issue: 4 Vol. 144; ISSN 0742-4787
Publisher:
ASME
Country of Publication:
United States
Language:
English

References (20)

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On the Mechanism of Contact Between Metal Surfaces: Part 2—The Real Area and the Number of the Contact Points journal January 1968
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Measurement, analysis and prediction of fretting wear damage in a representative aeroengine spline coupling journal December 2004
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On fretting maps journal September 1988
A Finite Element Study of Elasto-Plastic Hemispherical Contact Against a Rigid Flat journal April 2005
Wear analysis in fretting of hard coatings through a dissipated energy concept journal March 1997

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