TITLE

Mechanical Stress Analysis in a Dynamic Graphite-Graphite Contact: Consequences on Wear

AUTHOR(S)
Mouadji, Y.; Bouchoucha, A.; Bradai, M. A.; Zaidi, H.
PUB. DATE
July 2011
SOURCE
International Review of Mechanical Engineering;Jul2011, Vol. 5 Issue 5, p798
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In order to evaluate the wear of tribological pairs, it is important to know the type and the magnitude of the mechanical stress imposed at the dynamic contact. To do this, a numerical modell based on quasi-analytical solutions has been developed using a Matlab program. This modell can take into account the evolution of the mechanical stress generated in a dynamic contact as a function of the loading conditions and the coefficient of friction. This tool allows, by exploiting the calculation results, to obtain stress fields in every point under contact. To analyze these stress fields, we have considered the solution of the semi-infinite plane problem given by McEwen [1] and Johnson [2], where the contact pressure of Hertz [3] is limited to a circular contact area of radius a. The discussion of the results is based on the correlation between the limit values of the contact stress and the experimental results of the coefficient of friction and wear.
ACCESSION #
76125796

 

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