Abstract
Indentation-induced shape memory and superelastic effects are recently discovered thermo-mechanical behaviors that may find important applications in many areas of science and engineering. Theoretical understanding of these phenomena is challenging because both martensitic phase transformation and slip plasticity exist under complex contact loading conditions. In this paper, we develop a three-dimensional constitutive model of shape memory alloys with plasticity. Spherical indentation-induced superelasticity in a NiTi shape memory alloy was simulated and compared to experimental results on load-displacement curves and recovery ratios. We show that shallow indents have complete recovery upon unloading, where the size of the phase transformation region is about two times the contact radius. Deep indents have only partial recovery when plastic deformation becomes more prevalent in the indent-affected zone.
Original language | English |
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Article number | 053507 |
Journal | Journal of Applied Physics |
Volume | 101 |
Issue number | 5 |
DOIs | |
State | Published - 2007 |
Bibliographical note
Funding Information:We would like to express sincere thanks to Professor John A. Shaw at University of Michigan and Professor Thomas J. Pence at Michigan State University for discussions and suggestions. We are also grateful to National Science Foundation for partial support of this work under Grant Nos. SGER 0336810 and GOALI CMS 0510294.
Funding
We would like to express sincere thanks to Professor John A. Shaw at University of Michigan and Professor Thomas J. Pence at Michigan State University for discussions and suggestions. We are also grateful to National Science Foundation for partial support of this work under Grant Nos. SGER 0336810 and GOALI CMS 0510294.
Funders | Funder number |
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National Science Foundation (NSF) | GOALI CMS 0510294, SGER 0336810 |
ASJC Scopus subject areas
- General Physics and Astronomy