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Analysis of spherical indentation of superelastic shape memory alloys

journal contribution
posted on 2007-01-01, 00:00 authored by W Yan, Q Sun, X Q Feng, L Qian
Dimensional analysis and the finite element method are applied in this paper to study spherical indentation of superelastic shape memory alloys. The scaling relationships derived from dimensional analysis bridge the indentation response and the mechanical properties of a superelastic shape memory alloy. Several key variables of a superelastic indentation curve are revealed and examined. We prove that the bifurcation force in a superelastic indentation curve only relies on the forward transformation stress and the elastic properties of the initial austenite; and the return force in a superelastic indentation curve only relies on the reverse transformation stress and the elastic properties of the initial austenite. Furthermore, the dimensionless functions to determine the bifurcation force and the return force are proved to be identical. These results not only enhance our understanding of spherical indentation of superelastic shape memory alloys, but also provide the theoretical basis for developing a practicable method to calibrate the mechanical properties of a superelastic material from the spherical indentation test.

History

Journal

International journal of solids and structures

Volume

44

Issue

1

Pagination

1 - 17

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0020-7683

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2006, Elsevier Ltd

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