Analysis of spherical indentation of superelastic shape memory alloys

Yan, Wenyi, Sun, Qingping, Feng, Xi-Qiao and Qian, Linmao 2007, Analysis of spherical indentation of superelastic shape memory alloys, International journal of solids and structures, vol. 44, no. 1, pp. 1-17.


Title Analysis of spherical indentation of superelastic shape memory alloys
Author(s) Yan, Wenyi
Sun, Qingping
Feng, Xi-Qiao
Qian, Linmao
Journal name International journal of solids and structures
Volume number 44
Issue number 1
Start page 1
End page 17
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2007-01-01
ISSN 0020-7683
Keyword(s) shape memory alloys
superelasticity
spherical indentation
transformation stress
hardness
finite element simulations
Summary 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.
Language eng
Field of Research 091207 Metals and Alloy Materials
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2006, Elsevier Ltd
Persistent URL http://hdl.handle.net/10536/DRO/DU:30007125

Document type: Journal Article
Collection: School of Engineering and Information Technology
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