Abstract/Details

Thermodynamics of shape memory alloy wire: Modeling, experimental calibration, and simulation


2006 2006

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Abstract (summary)

A thermomechanical model for a shape memory alloy (SMA) wire under uniaxial loading is implemented in a finite element framework, and simulation results are compared with mechanical and infrared experimental data. The constitutive model is a one-dimensional strain-gradient continuum model of an SMA wire element, including two internal field variables, possible unstable mechanical behavior, and the relevant thermomechanical couplings resulting from latent heat effects. The model is calibrated to recent and new experiments of typical commercially available polycrystalline NiTi wire. The shape memory effect and pseudoelastic behaviors are demonstrated numerically as a function of applied displacement rate and environmental parameters, and the results compare favorably to experimental data. The model is then used to simulate a simple SMA actuator device, and its performance is assessed for different thermal boundary conditions.

Indexing (details)


Subject
Aerospace materials;
Mechanical engineering;
Materials science
Classification
0538: Aerospace materials
0548: Mechanical engineering
0794: Materials science
Identifier / keyword
Applied sciences; Actuators; Shape memory alloy; Strain gradient; Thermodynamics; Wire
Title
Thermodynamics of shape memory alloy wire: Modeling, experimental calibration, and simulation
Author
Chang, Bi-chiau
Number of pages
157
Publication year
2006
Degree date
2006
School code
0127
Source
DAI-B 67/02, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780542568688, 0542568683
Advisor
Shaw, John A.
University/institution
University of Michigan
University location
United States -- Michigan
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3208435
ProQuest document ID
305305102
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/305305102
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