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Determination of elastic and viscoplastic material properties obtained from indentation tests using a combined finite element analysis and optimization approach

Kang, JiJun; Becker, Adib A.; Sun, Wei

Authors

JiJun Kang

Adib A. Becker

Wei Sun



Abstract

Conventional indentation tests do not provide an accurate estimation of viscoplastic material properties. In this work, a combined finite element analysis and optimization approach is developed for the determination of elastic–plastic and creep material properties using only a single indentation loading–unloading curve based on a two-layer viscoplasticity model. Utilizing the indentation loading–unloading curve obtained from a finite element-simulated experiment with a spherical and a conical indenter, a set of six key material properties (Young’s modulus, yield stress, work hardening exponent and three creep parameters) can be determined. Non-linear optimization algorithms are used with different sets of initial material properties, leading to good agreements with the numerically simulated target loading–unloading curves.

Journal Article Type Article
Publication Date Jun 4, 2015
Journal Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
Print ISSN 1464-4207
Electronic ISSN 2041-3076
Publisher SAGE Publications
Peer Reviewed Peer Reviewed
Volume 229
Issue 3
APA6 Citation Kang, J., Becker, A. A., & Sun, W. (2015). Determination of elastic and viscoplastic material properties obtained from indentation tests using a combined finite element analysis and optimization approach. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 229(3), https://doi.org/10.1177/1464420713504534
DOI https://doi.org/10.1177/1464420713504534
Keywords Indentation, Finite element analysis, Optimization, Two-layer viscoplasticity model
Publisher URL http://pil.sagepub.com/content/229/3/175
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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