Elastic modulus determined by Hertzian indentation
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A new method for determining the elastic modulus from Hertzian contact experiments has been developed. The test surfaces are polished and coated with a thin layer of gold/palladium and then indented with a small sphere. The contact removes the coating from the contact area and the size of this can, therefore, be readily measured in an optical microscope. A simple analysis based on Hertz equations is then used to derive the modulus. The elastic modulus of glass and several ceramics is reported.
KeywordsPolymer Elastic Modulus Thin Layer Optical Microscope Contact Area
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- 1.H. Hertz, “Hertz's Miscellaneous Papers” (Macmillan, London, 1896) Ch. 5 and 6.Google Scholar
- 2.M. T. Huber, Ann. Physik 14 (1904) 153.Google Scholar
- 3.G. Lundberg and H. Sjövall, Publikation no 4, Chalmers Unilversity of Technology, Göteborg (1958).Google Scholar
- 4.K. Zeng, K. Breder and D. J. Rowcliffe, submitted (1991).Google Scholar
- 5.Idem., ibid. (1991).Google Scholar
- 6.F. C. Frank and B. R. Lawn, Proc. Roy. Soc. 229A (1967) 2991.Google Scholar
- 7.B. R. Lawn, J. Appl. Phys. 39 (1968) 4828.Google Scholar
- 8.R. Warren, Acta, Metall. 26 (1978) 1759.Google Scholar
- 9.D. B. Marshall, T. Noma and A. G. Evans, J. Amer. Ceram. Soc. 65 (1982) C-175.Google Scholar
- 10.N. L. Hecht, D. E. McCullum and G. A. Graves, Ceram. Engng Sci. Proc. 9 (1988) 1313.Google Scholar
- 11.K. Breder, K. Zeng and D. J. Rowcliffe, ibid. 10 (1989) 1005.Google Scholar