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Contact Area Evolution During an Indentation Process

Published online by Cambridge University Press:  31 January 2011

Kangjie Li ,
T. W. Wu  and
J. C. M. Li
Kangjie Li
Affiliation:
Materials Science Program, Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627
T. W. Wu
Affiliation:
IBM Research Division, Almaden Research Center, San Jose, California 95120
J. C. M. Li
Affiliation:
Materials Science Program, Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627
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Abstract

The evolution of the contact area during an indentation process has been xamined by an ac technique and also by finite element analysis on five mechanically different materials. Constant contact area regimes were observed during the initial unloading stage and the duration of that regime depends strongly on material properties. The consistency of the results obtained by the two approaches not only proves the validity and advantage of the ac indentation technique but also confirms the applicability of contact stiffness equation. The influence of a hardness impression on unloading characteristics has also been clearly demonstrated by numerically simulating a reloading process.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 8 , August 1997 , pp. 2064 - 2071
Copyright
Copyright © Materials Research Society 1997

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