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    Mathematical Analysis on the Uniqueness of Reverse Algorithm for Measuring Elastic-plastic Properties by Sharp Indentation

    162559_162559.pdf (658.0Kb)
    Access Status
    Open access
    Authors
    Huang, Y.
    Liu, X.
    Zhou, Y.
    Ma, Z.
    Lu, Chungsheng
    Date
    2011
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Huang, Yongli and Liu, Xiaofang and Zhou, YiChun and Ma, Zengsheng and Lu, Chungsheng. 2011. Mathematical Analysis on the Uniqueness of Reverse Algorithm for Measuring Elastic-plastic Properties by Sharp Indentation. Journal of Materials Science and Technology. 27 (7): pp. 577-584.
    Source Title
    Journal of Materials Science and Technology
    ISSN
    1005-0302
    School
    Department of Mechanical Engineering
    Remarks

    NOTICE: This is the author’s version of a work that was accepted for publication in Journal of Materials Science and Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Materials Science and Technology, 27, 7, 2011

    URI
    http://hdl.handle.net/20.500.11937/20037
    Collection
    • Curtin Research Publications
    Abstract

    The reverse analysis provides a convenient method to determine four elastic-plastic parameters through an indentation curve such as Young's modulus E, hardness H, yield strength σy and strain hardening exponent n. In this paper, mathematical analysis on a reverse algorithm from Dao model (Dao et al., Acta Mater., 2001, 49, 3899) was carried out, which thought that only when 20≤E*/σ0:033≤26and 0.3<n≤0.5, the reverse algorithm would yield two solutions of n by dimensionless function Π2. It is shown that, however, there are also two solutions of n when 20≤E*/σ0:033≤26 and 0≤n<0.1. A unique n can be obtained by dimensionless function Π3 instead of Π2 in these two ranges. E and H can be uniquely determined by a full indentation curve, and σy can be determined if n is unique. Furthermore, sensitivity analysis on obtaining n from dimensionless function Π3 or Π22 has been made.

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