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REVIEW ARTICLES

Shape memory alloy actuators in smart structures: Modeling and simulation

[+] Author and Article Information
Stefan Seelecke

Department of Mechanical & Aerospace Engineering, North Carolina State University, Raleigh, NC 27695-7910; stefan_seelecke@ncsu.edu

Ingo Müller

Inst. f. Verfahrenstechnik, TU Berlin, Sekr. HF2, Straße des 17. Juni 135, D-10623 Berlin, Germany; im@thermodynamik.tu-berlin.de

Appl. Mech. Rev 57(1), 23-46 (Feb 10, 2004) (24 pages) doi:10.1115/1.1584064 History: Online February 10, 2004
Copyright © 2004 by ASME
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References

Figures

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Schematic load-deformation diagram of a shape memory alloy, displaying quasiplastic (left) and pseudoelastic behavior (right)
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Deformation-temperature diagram of a typical NiTiCu wire
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Section of an adaptive aircraft wing illustrating the actuation potential of SMA wires
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Lattice particle in austenitic phase A and martensitic twin phases M±
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Potential energy of a lattice particle
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Layer structure of macroscopic SMA model
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Helmholtz free energy (effective potential energy) of a layer at three different temperatures: high (top), intermediate (middle) and low temperature (bottom)
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Gibbs free energy of a layer under a load at an intermediate temperature
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Pseudoelastic behavior of a CuZnAl single crystal. Experimental data taken from Fu et al. 106 and Glasauer 107
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Tensile experiment performed with a NiTi wire in air and water environment. Experimental data from Shaw and Kyriakides 8
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Experimental setup for closed loop feedback control of an SMA actuator
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Response of SMA actuator to step function set point (thin line) at small gain factor—experiment
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Response of SMA actuator to step function set point (thin line) at small gain factor—simulation
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Response of SMA actuator to step function set point (thin line) at high gain factor—experiment
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Response of SMA actuator to step function set point (thin line) at high gain factor—simulation
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Response of SMA actuator to sinusoidal set point (thin line) at small frequency (ω=0.4 rad/s)—experiment
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Response of SMA actuator to sinusoidal set point (thin line) at small frequency (ω=0.4 rad/s)—simulation
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Response of SMA actuator to sinusoidal set point (thin line) at high frequency (ω=1.4 rad/s)—experiment
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Response of SMA actuator to sinusoidal set point (thin line) at intermediate frequency (ω=0.6 rad/s)—simulation
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Elastic beam with heated SMA wire actuator
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Two heating pulses applied to the wire (left) and resulting temperature (right)
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Evolution of the phase fractions during the heating and cooling process
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Time-dependent wire deformation leading to different beam shapes
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Optimal control of beam shape adjustement with SMA wires
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Wire deformation in the case of unknown final value
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Optimal control in the case of unknown final value
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Wire deformation in the case of disturbed environmental temperature
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Optimal control in the case of disturbed environmental temperature
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Wire deformation for the coupled problem
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Optimal control for the coupled problem
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Photograph of an adaptive beam with two shape memory wires
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Finite element mesh of the adaptive beam
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Heating functions for the two wires. Left wire: dashed line, right wire: solid line
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Resulting temperature in the two wires. Left wire: dashed line, right wire: solid line
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Sequence of resulting beam shapes at different times
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Finite element model of a section of the flexible trailing edge of an adaptive aircraft wing
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Reference configuration and maximally bent trailing edge

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