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http://dx.doi.org/10.3795/KSME-A.2008.32.1.035

A Numerical Approach to Young's Modulus Evaluation by Conical Indenter with Finite Tip-Radius  

Lee, Jin-Haeng (서강대학교 대학원 기계공학과)
Kim, Deok-Hoon (서강대학교 대학원 기계공학과)
Lee, Hyung-Yil (서강대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.32, no.1, 2008 , pp. 35-42 More about this Journal
Abstract
Instrumented sharp indentation test is a well-directed method to measure hardness and elastic modulus. The sharp indenter such as Berkovich and conical indenters have a geometrical self-similarity in theory, but the self-similarity ceases to work in practice due to inevitable indenter tip-blunting. In this study we analyzed the load-depth curves of conical indenter with finite tip-radius via finite element method. Using the numerical regression data obtained from Kick's law, we first confirmed that loading curvature is significantly affected by tip radius as well as material properties. We then established a new method to evaluate Young's modulus, which successfully provides the value of elastic modulus with an average error of less than 2%, regardless of tip-radius and material properties of both indenter and specimen.
Keywords
Indentation Test; Tip Radius; Young's Modulus; Material Property; FEA;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By SCOPUS : 0
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