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Title:Investigation of pitting and shelling failures in rolling contract
Author(s):Mitsuda, Tetsuichi
Rolling Contact
Abstract:An investigation of the problem of shelling in crane wheels has been conducted by means of simplified laboratory models. Complex factors of loading and shape have been eliminated to focus attention on free rolling and rolling with tangential tractive forces. Analytical solutions for rolling contact are based on elastic considerations but both prototype and model are subject to severe plastic strains which cause a rapid decrease in initial Hertz stresses. The mathematical theory of plasticity on problems of contained plastic deformation has yielded solutions only for a few simple cases. Closed form solutions that satisfy the conditions of equilibrium, compatibility, elastic plastic constitutive relations simultaneously throughout the solid and on its boundaries, are considered untenable presently. An approximate solution by Johnson (31) is compared against model observations to establish the order of magnitude of decrease in stress. Attempts have been directed toward obtaining shelling or pitting failures in the unlubricated or dry condition. Phenomenological differences between lubricated and dry specimens are cited and reasons for the necessity of a lubricant to cause pitting are given. The significance of dry damage cycles prior to lubrication in the pitting life of a specimen has been investigated both in free rolling and with tangential forces. The influence of slip in causing early pitting failures has been investigated, leading to questions on effects of track geometry in causing pitting in free rolling. Rapid pitting obtained by a process of dry run-in, dry friction and lubricated free rolling indicates that with further development it could possibly be used as a relatively rapid testing method to compare the pitting resistance of various materials in rolling contact.
Issue Date:1965-09
Publisher:Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report:TAM R 286
Genre:Technical Report
Sponsor:Association of Iron and Steel Engineers
Rights Information:Copyright 1965 Board of Trustees of the University of Illinois
Date Available in IDEALS:2021-11-04

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  • Technical Reports - Theoretical and Applied Mechanics (TAM)
    TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.

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