Material Characterization of SMA Actuators Under Nonproportional Thermomechanical Loading
- 1 January 1999
- journal article
- Published by ASME International in Journal of Engineering Materials and Technology
- Vol. 121 (1), 75-85
- https://doi.org/10.1115/1.2816003
Abstract
The application of SMA actuators in smart structures usually involves thermally induced phase transformation with a variable applied stress in SMA actuators, resulting in thermomechanical nonproportional loading of SMAs in stress-temperature space. To investigate the constitutive response of SMAs under thermomechanical nonproportional loading, experiments for thermally induced phase transformation of binary NiTi SMA wires loaded by an elastic linear spring are performed in the Active Materials Laboratory at Texas A&M University. A constitutive model developed by Bo and Lagoudas (1998a, b, c) and Lagoudas and Bo (1998) is used as the basis for the theoretical prediction of the response of SMA line actuators loaded by springs with different elastic constants. Model predictions are compared with experimental results.Keywords
This publication has 17 references indexed in Scilit:
- Phase transitions in elastoplastic materials: Continuum thermomechanical theory and examples of control. Part IIJournal of the Mechanics and Physics of Solids, 1997
- Phase transitions in elastoplastic materials: Continuum thermomechanical theory and examples of control—part IJournal of the Mechanics and Physics of Solids, 1997
- A UNIFIED THERMODYNAMIC CONSTITUTIVE MODEL FOR SMA AND FINITE ELEMENT ANALYSIS OF ACTIVE METAL MATRIX COMPOSITESMechanics of Composite Materials and Structures, 1996
- A thermodynamical constitutive model for shape memory materials. Part I. The monolithic shape memory alloyInternational Journal of Plasticity, 1996
- Thermomechanical aspects of NiTiJournal of the Mechanics and Physics of Solids, 1995
- One-Dimensional Constitutive Behavior of Shape Memory Alloys: Thermomechanical Derivation with Non-Constant Material Functions and Redefined Martensite Internal VariableJournal of Intelligent Material Systems and Structures, 1993
- One-Dimensional Thermomechanical Constitutive Relations for Shape Memory MaterialsJournal of Intelligent Material Systems and Structures, 1990
- Nonlinear and nonlocal continuum model of transformation precursors in martensitesMetallurgical Transactions A, 1988
- An analysis of a new class of integration algorithms for elastoplastic constitutive relationsInternational Journal for Numerical Methods in Engineering, 1986
- On the characterization of fluxes in nonlinear irreversible thermodynamicsInternational Journal of Engineering Science, 1974