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http://dx.doi.org/10.5228/KSPP.2004.13.1.021

A Study on the Unloading Stiffness of Instrumented Indentation Tests  

이병섭 (한국원자력연구소 원자력재료기술개발부)
이호진 (한국원자력연구소 원자력재료기술개발부)
이봉상 (한국원자력연구소 원자력재료기술개발부)
Publication Information
Transactions of Materials Processing / v.13, no.1, 2004 , pp. 21-26 More about this Journal
Abstract
Instrumented indentation tests have been used for estimating material properties. In order to analyze deformation characteristics with various factors, the unloading stiffness should be properly determined from the elastic behavior. The unloading stiffness is generally obtained from the shifted power functions fitting with the experimental unloading data. However, the functions often give rise to a poor representation of actual data, and also the unloading stiffness is governed by unloading condition. In this study, both numerical and experimental conditions to obtain proper unloading stiffness were investigated. The result showed that the amount of unloading ratio and hold time played an important role in fitting the unloading curves. The current efforts can successfully provide the unloading stiffness for indentation material properties.
Keywords
Unloading Stiffness; Instrumented Indentation Tests; Shifted Power Functions; Numerical Control Condition; Indentation Unloading Condition; Indentation Material Properties;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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