Active and passive multicycle actuation characteristics of shape memory alloy-based adaptive composite structures

2021 ◽  
Author(s):  
VIJAY CHOYAL ◽  
SUHEL KHAN ◽  
Mani Prabu S.S. ◽  
Palani I A ◽  
Pushpendra Singh
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Composite Structures ◽  
Adaptive Composite

Design, manufacturing, and testing of an adaptive composite panel with embedded shape memory alloy actuators

2014 ◽  
Vol 26 (15) ◽  
pp. 2055-2072 ◽  
Author(s):  
Simon Lacasse ◽  
Patrick Terriault ◽  
Charles Simoneau ◽  
Vladimir Brailovski
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Composite Panel ◽  
Adaptive Composite

Vibration Characteristics of Composite Plate Embedded with Shape Memory Alloy at Elevated Temperature

2013 ◽  
Vol 393 ◽  
pp. 655-660 ◽  
Author(s):  
Izzuddin Zaman ◽  
Bukhari Manshoor ◽  
Amir Khalid ◽  
Sherif Araby ◽  
Mohd Imran bin Ghazali
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Composite Structures ◽  
Composite Plate ◽  
Free Vibration Analysis ◽  
Composite Plates ◽  
Vibration Characteristics ◽  
Modal Testing ◽  
Phase Transformation Temperature ◽  
Wide Range

Unique functional material of shape memory alloy has attracted tremendous interest from researches, thus has been broadly investigated for a wide range application. Current research effort extends the use of SMA for the design of smart composite structures due to its shape memory effect, pseudo-elasticity and high damping capability. This paper presents an assessment of applications of the SMA materials for structural vibration controls, where the influences of SMA as reinforcement in the composite plate at different temperature are investigated. Four cases of composite plate are studied, which two of them are SMA-based composite fabricated at 0° and 45° angles, and the other two plates are neat (without SMA wires) and built with local stiffener. By using modal testing, the free vibration analysis is carried out to determine the vibration characteristics of composite plates. The results show that infusing SMA wires into composites increased the natural frequencies of the plate considerably, while decreased slightly for damping percentage. However, when SMA wires are heated, the damping percentage improved tremendously due to the phase transformation temperature of SMA from martensite to austenite. The outcome of this study reveals the potential of SMA materials in active vibration control.

Passive vibration control of plate structures using shape memory alloy ribbons

2016 ◽  
Vol 23 (1) ◽  
pp. 69-88 ◽  
Author(s):  
M Bodaghi ◽  
M Shakeri ◽  
MM Aghdam
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Vibration Control ◽  
Composite Structures ◽  
Shear Deformation Theory ◽  
Dynamic Loads ◽  
Niti Shape Memory Alloy ◽  
Shear Stresses ◽  
Governing Equations ◽  
Passive Vibration Control

Problems associated with the modeling and vibration control of rectangular plates under dynamic loads with integrated polycrystalline NiTi shape memory alloy (SMA) ribbons are developed. In order to simulate the thermo-mechanical behavior of SMA ribbons under dominant axial and transverse shear stresses, a robust macroscopic constitutive model is introduced. The model is able to accurately predict martensite transformation/orientation, shape memory effect, pseudo-elasticity and in particular reorientation of martensite variants and ferro-elasticity features. The structural model is based on the adoption of the first-order shear deformation theory and on the geometrical non-linearity in the von Kármán sense. Towards obtaining the governing equations of motion, the Hamilton principle is used. Finite element and Newmark methods along with an iterative incremental process based on the elastic-predictor inelastic-corrector return mapping algorithm are implemented to solve the non-linear governing equations in spatial and time domains. Numerical simulations highlighting the implications of pre-strain state and temperature of the SMA ribbons, as well as those related to the respective dynamic loads, are presented and discussed in detail. It is found that the modeling of ferro-elasticity in the dynamic analysis of SMA composite structures could lead to significant conclusions concerning the passive vibration control capability of low-temperature SMA ribbons.

Nonlinear Adaptive Control of Dynamic Systems Driven by Shape Memory Alloy (SMA) Actuators

2008 ◽  
Author(s):  
Shuo Chen ◽  
William J. Craft ◽  
David Y. Song
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Composite Structures ◽  
Lyapunov Stability Theory ◽  
Linear Displacement ◽  
Control Algorithms ◽  
Sma Actuators ◽  
Composite Systems ◽  
Set Up ◽  
And Control

This work describes the development and analysis of nonlinear adaptive based control algorithms for composite structures/systems operated with Shape Memory Alloy (SMA) actuators. A mathematical model charactering the motion of the composite systems is established, and by using Lyapunov stability theory, algorithms for linear displacement tracking control are derived. Actuation and control is achieved by adjusting the supply current to the SMA actuators. It is shown that with the proposed strategy for both linear displacement and velocity requires that the desired trajectory is tracked precisely. The novelty of the proposed approach also lies in the fact that it is fairly easy to set up and the computation involved as compared with other strategies. An example is used to verify the validity of the proposed approach. Simulation results using Matlab are presented.

A novel self-healing composite made of thermally reversible polymer and shape memory alloy reinforcement

2019 ◽  
Vol 30 (10) ◽  
pp. 1585-1593 ◽  
Author(s):  
Ali Saeedi ◽  
Mahmood M Shokrieh
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Composite Structures ◽  
Fracture Behavior ◽  
Micromechanical Model ◽  
Self Healing ◽  
Compression Tests ◽  
Healing Efficiency ◽  
Shape Memory Effects ◽  
Good Agreement

A novel self-healing polymer composite made of the thermally reversible polymer matrix and shape memory alloy reinforcement is introduced. The healing system is designed in such a way that by heating the structure, activation of shape recovery in shape memory alloy and chemical reversible reactions in polymer occur simultaneously. In the present healing method, the required crack closure force is provided by activating the embedded shape memory alloy wires in the polymer. Both superelastic and shape memory effects of shape memory alloy are considered on the fracture behavior of composites by investigating the passive and active reinforcement methods, respectively. Double cleavage drilled compression tests are utilized in order to study the fracture behavior and healing efficiency of composites. In the case of passive reinforcement, embedding 2% prestrained shape memory alloy wires caused 15% enhancement in the fracture toughness of composites. In this prestrain level, results of the micromechanical model are in good agreement with experiments. Promising results are also obtained for healing efficiency of composites in the case of active reinforcement. The average healing efficiency of 92% is achieved for shape memory alloy-reinforced thermally reversible epoxy composites. The excellent healing performance, without the necessity of external force and pressure, makes the present healing method as an ideal candidate for utilizing self-healing composite structures.

Analytical study of thermal buckling and post-buckling behavior of composite beams reinforced with SMA by Reddy Bickford theory

2021 ◽  
pp. 1045389X2110116
Author(s):  
Mahshad Fani ◽  
Fathollah Taheri-Behrooz
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Composite Structures ◽  
Volume Fraction ◽  
Thermal Buckling ◽  
Constitutive Law ◽  
Beam Deflection ◽  
Buckling Behavior ◽  
Non Linear ◽  
Post Buckling

Shape memory alloys are used in composite structures due to their shape memory effect and phase transformation. The recovery force of the shape memory alloy improves the post-buckling behavior of the structure. In this study, the thermal buckling and post-buckling of Shape Memory Alloy (SMA) hybrid composite laminated beam subjected to uniform temperature distribution is investigated. To this purpose, considering Von-Karman non-linear strain terms for large deformation, the non-linear equations of SMA reinforced beam based on Reddy Bickford theory have been derived. Besides, the recovery stress of the restrained SMA wires during martensitic transformation was calculated based on the one-dimensional constitutive law of the Brinson’s model. A numerical solution using Galerkin’s method has been presented for solving the nonlinear partial differential equations to obtain the critical buckling temperature and transverse deformation of the beam in the post-buckling region in both symmetric and anti-symmetric layups. The effect of SMA volume fraction, pre-strain, the boundary condition of the beam, stacking sequence, and its geometric properties have been studied. The results show that even by adding a small amount of SMA to the composite, the critical buckling temperature increases significantly, and the beam deflection decreases. Besides, using this theory has an evident effect on the anti-symmetric layup, especially for the thick beams.

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