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On the generality of the relationship among contact stiffness, contact area, and elastic modulus during indentation

Published online by Cambridge University Press:  31 January 2011

G.M. Pharr ,
W.C. Oliver  and
F.R. Brotzen
G.M. Pharr
Affiliation:
Department of Materials Science, Rice University, P. O. Box 1982, Houston, Texas 77251
W.C. Oliver
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
F.R. Brotzen
Affiliation:
Department of Materials Science, Rice University, P. O. Box 1982, Houston, Texas 77251
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Abstract

Results of Sneddon's analysis for the elastic contact between a rigid, axisymmetric punch and an elastic half space are used to show that a simple relationship exists among the contact stiffness, the contact area, and the elastic modulus that is not dependent on the geometry of the punch. The generality of the relationship has important implications for the measurement of mechanical properties using load and depth sensing indentation techniques and in the measurement of small contact areas such as those encountered in atomic force microscopy.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 3 , March 1992 , pp. 613 - 617
Copyright
Copyright © Materials Research Society 1992

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