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An approach for the inverse estimation of the elastoplastic properties from a single indentation with a Berkovich indenter was developed. The relationship between the load-displacement and stress-strain curves was derived based on the equivalent energy principle, while an approximate equation for pile-up height was determined using elastic and plastic limits. The approach proposed in this study estimates the yield stress and strain-hardening exponent from hardness and pile-up height obtained from a single indentation based on these fundamental equations. The coefficients in the equations were determined in a parametric study using finite element analyses. The accuracy of the inverse estimation technique was confirmed using aluminum alloy and stainless steel samples and reference tensile testing.

Rights:

• Creative Commons BY Attribution 4.0 International
  Creative Commons BY Attribution 4.0 International

Keyword: Elastic-plastic material, Finite elements, Mechanical testing, Indentation, Inverse analysis

Date published: 2020-06-30

Publisher: Elsevier BV

Journal:

• MATERIALS & DESIGN (ISSN: 02641275) vol. 194 p. 108925-108925

Funding:

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1016/j.matdes.2020.108925

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Updated at: 2024-01-05 22:11:40 +0900

Published on MDR: 2023-03-02 09:44:28 +0900