The identification method of hardening parameters specifying stress-strain curve is proposed by applying spherical indentation test and measuring the penetration depth during loading and unloading. The loading program is composed of a geometric sequence of loading and partial unloading steps from which the variation of permanent penetration with load level is determined. This data is used for specification of two parameters k and m occurring in the plastic hardening curve εp=σ/k1/m, where εp denotes the plastic strain.

Issue Section:
Technical Papers
Keywords:
indentation, hardening, stress-strain relations, plastic deformation, metals
Topics:
Hardening, Metals, Stress, Stress-strain curves, Deformation
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Copyright © 2001
 by ASME
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