scholarly journals Structural acoustic response of a shape memory alloy hybrid composite panel (lessons learned)

2002 ◽  
Author(s):  
Travis L. Turner
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Hybrid Composite ◽  
Lessons Learned ◽  
Composite Panel ◽  
Acoustic Response

Thermal post-buckling analysis of shape memory alloy hybrid composite shell panels

2004 ◽  
Vol 13 (6) ◽  
pp. 1337-1344 ◽  
Author(s):  
Jin-Ho Roh ◽  
Il-Kwon Oh ◽  
Seung-Man Yang ◽  
Jae-Hung Han ◽  
In Lee
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Hybrid Composite ◽  
Composite Shell ◽  
Buckling Analysis ◽  
Post Buckling

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

Dynamic response of laminated composite beam reinforced with shape memory alloy wires subjected to low velocity impact of multiple masses

2017 ◽  
Vol 52 (8) ◽  
pp. 1089-1101 ◽  
Author(s):  
SMR Khalili ◽  
A Saeedi
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Hybrid Composite ◽  
Composite Beam ◽  
Volume Fraction ◽  
Laminated Composite ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Laminated Composite Beam

The response of laminated hybrid composite beam with embedded shape memory alloy wires subjected to impact of multiple masses is analytically investigated. Two degree of freedom spring-mass system and Fourier series are used in order to study the low velocity impact phenomenon on the resulting hybrid composite beam. A linearized contact law is chosen to calculate the contact force history. The effect of pseudo elasticity of wires as well as the recovery stresses generated in shape memory alloy wires due to shape memory effect is investigated. The beam is subjected to impactors with various masses, radii, and initial velocities. Impacts are occurred on the top and/or bottom surface of the beam. The effects of volume fraction of shape memory alloy wires, location of embedded wires, location of impacts and pre-strain in shape memory alloy wires on the contact force history and the deflection curve of the beam are investigated. The obtained results illustrated that embedding shape memory alloy wires in the laminated composite beam caused the deflection of the beam to occur more local at the points of impact, in comparison with the beams without shape memory alloy wires. Moreover, embedding 0.2 volume fraction of the shape memory alloy wires reduced the maximum deflection of the beam subjected to impact of 2 impactor masses by 57% and 3 impactor masses (on both sides) by 12%. Pre-straining the wires caused more reduction in deflection of the beam under impact loading.

scholarly journals Thermo-mechanical behaviour of a Carbon Fibre Reinforced Shape Memory Alloy Hybrid Composite

2009 ◽  
Author(s):  
G. Faiella ◽  
S. Fascia ◽  
L. Cianciulli ◽  
V. Antonucci ◽  
A. Laudati ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Carbon Fibre ◽  
Shape Memory ◽  
Mechanical Behaviour ◽  
Hybrid Composite

Designing a Morphable Parabolic Reflector Antenna Using Origami-Inspired Discretization and Efficient Global Optimization

2020 ◽  
Author(s):  
Gregory Wilson ◽  
Dimitris Lagoudas ◽  
Darren Hartl
Keyword(s):  
United States ◽  
Global Optimization ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Radiation Pattern ◽  
Optimization Algorithm ◽  
The United States ◽  
Lessons Learned ◽  
Efficient Global Optimization ◽  
Global Optimization Algorithm

Abstract This research explores a segmented parabolic antenna that can change its physical shape via shape memory alloy actuators, thereby altering its radiation pattern when transmitting a signal. The parabolic dish has been discretized into an origami pattern to make use of the naturally compliant fold regions, about which shape memory alloy wires create moments. Modeling of antenna deformation is accomplished via Abaqus considering SMA wires contracting due to temperature change as a manifestation of the shape memory effect. An electromagnetic analysis of the deformed antenna follows in ANSYS-HFSS to determine the antenna gain in all directions around the structure. The computed radiation pattern is projected onto a goal shape (e.g. the contiguous United States) to determine the degree to which the shaped broadcast pattern matches that of a desired broadcast area. Finally, the design is iterated using an efficient global optimization algorithm to ascertain an actuation schedule that generates the most conformal broadcast pattern. Traditional optimization algorithms such as genetic or particle swarm may require thousands of designs, particularly when many design variables are considered. The efficient global optimization algorithm employs far fewer designs by fitting surrogate models to the data and only testing points where large improvement is expected, thus reducing design optimization time. The evolution and improvement to an antenna will be discussed for an antenna making use of eight, 16, and 24 SMA linear actuators to most optimally broadcast to only the United States while avoiding signal spill-over into other regions, and the lessons learned can then applied to match broadcast pattern based on other countries as well.

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