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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