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An algorithm to determine the plastic properties of materials based on the loading data in single sharp indentation

Published online by Cambridge University Press:  01 February 2011

Akio Yonezu,
Hiroyuki Hirakata and
Kohji Minoshima
Akio Yonezu
Affiliation:
akio_yonezu831@hotmail.com, Osaka University, Mechanical Engineering, M1-222 2-1 Yamadaoka Suita, Osaka, 565-0871, Japan
Hiroyuki Hirakata
Affiliation:
hirakata@mech.eng.osaka-u.ac.jp, Osaka University, Mechanical Engineering, 2-1 Yamadaoka Suita, Osaka, 565-0871, Japan
Kohji Minoshima
Affiliation:
k-minoshima@mech.eng.osaka-u.ac.jp, Osaka University, Mechanical Engineering, 2-1 Yamadaoka Suita, Osaka, 565-0871, Japan
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Abstract

We proposed a method to determine the plastic properties of bulk materials based on data of loading curvature in indentation curve with only one sharp indenter. This method uses the dimensional analysis to solve the representative stress and effective yield stress. Indentation unloading data is only used to select the unique solution from the calculated ones obtained from representative stress and effective yield stress. We applied the proposed method to four engineering metals on an experimental basis, to verify its effectiveness, as well as its superiority to the reported methods.

Keywords

stress/strain relationshiphardnessmetal

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