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

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.

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

• Journal Article Type: Article
• Acceptance Date: May 22, 2013
• Online Publication Date: Sep 24, 2013
• Publication Date: Jun 4, 2015
• Deposit Date: Jul 28, 2016
• Publicly Available Date: Jul 28, 2016
• 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
• DOI: https://doi.org/10.1177/1464420713504534
• Keywords: Indentation, Finite element analysis, Optimization, Two-layer viscoplasticity model
• Public URL: https://nottingham-repository.worktribe.com/output/755205
• Publisher URL: http://pil.sagepub.com/content/229/3/175