Characteristic strain and fracture resistance for scratch independently of indenter geometry
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United States of America Patent
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Sep 20, 2005
Grant Date -
Jan 22, 2004
app pub date -
Apr 8, 2003
filing date -
Apr 10, 2002
priority date (Note) -
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Abstract
The invention involves an apparatus and method for calculating characteristics of materials, such as equivalent strain, using an indenter where the method used is independent of indenter geometry. The method includes performing a scratch test to calculate the strain for each of a plurality of indenter shapes, such as a theoretical sphere and cone, using known equations. The strain of a composite indenter, such as a cone with a rounded tip, can then be determined taking into account contributions from each of the plurality of theoretical shapes.
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