Shape changes by coupled bending and twisting of shape-memory-alloy-embedded composite beams
- 1 July 2002
- journal article
- Published by IOP Publishing in Smart Materials and Structures
- Vol. 11 (4) , 519-526
- https://doi.org/10.1088/0964-1726/11/4/306
Abstract
Shape memory alloys (SMAs) have demonstrated the potential for various smart structure applications. SMAs undergo a reversible phase transformation from martensite to austenite as temperature increases. This transformation leads to shape recovery and associated recovery strains. If SMA actuators are embedded off the neutral surface and are oriented at arbitrary angles with respect to a beam axis, then the beam bends and twists due to the coupling effects of recovery strains activated. In this study, the shape changes by bending and twisting of a SMA/graphite/epoxy beam controlled by both electric resistive heating and passive elastic tailoring were investigated. Three-dimensional finite-element formulations were derived and validated to analyze the responses of the SMA/composite beam. Numerical results show that the shape of the SMA/graphite/epoxy composite beam can be controlled by judicious choices of control temperatures, SMA angles and elastic tailoring.Keywords
This publication has 11 references indexed in Scilit:
- Structures technology for future aerospace systemsComputers & Structures, 2000
- Modified Shape Memory Alloy (SMA) Model for SMA Wire Based Actuator DesignJournal of Intelligent Material Systems and Structures, 1999
- Actuation of elastomeric rods with embedded two-way shape memory alloy actuatorsSmart Materials and Structures, 1998
- Natural Frequencies of Multi-Layer Composite Plate with Embedded Shape Memory Alloy WiresJournal of Intelligent Material Systems and Structures, 1998
- Thick-walled composite beam theory including 3-d elastic effects and torsional warpingInternational Journal of Solids and Structures, 1997
- Shape memory alloy actuation for active tuning of composite beamsSmart Materials and Structures, 1997
- 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
- Finite element analysis of the behavior of shape memory alloys and their applicationsInternational Journal of Solids and Structures, 1993
- One-Dimensional Thermomechanical Constitutive Relations for Shape Memory MaterialsJournal of Intelligent Material Systems and Structures, 1990
- A non‐conforming element for stress analysisInternational Journal for Numerical Methods in Engineering, 1976