Investigation of interfacial shear stresses, shape fixity, and actuation strain in composites incorporating shape memory polymers and shape memory alloys

Jungkyu Park; Leon M. Headings; Marcelo J. Dapino; Jeffery W. Baur; Gyaneshwar P. Tandon

doi:10.3389/fmats.2015.00012

Investigation of interfacial shear stresses, shape fixity, and actuation strain in composites incorporating shape memory polymers and shape memory alloys

Jungkyu Park, Leon M. Headings, Marcelo J. Dapino, Jeffery W. Baur, Gyaneshwar P. Tandon

Research output: Contribution to journal › Article › peer-review

Abstract

Shape memory composites (SMCs) based on shape memory alloys (SMAs) and shape memory polymers (SMPs) allow many design possibilities due to their controllable temperature-dependent mechanical properties. The complementary characteristics of SMAs and SMPs can be utilized in systems with shape recovery created by the SMA and shape fixity provided by the SMP. In this research, three SMC operating regimes are identified and the behavior of SMC structures is analyzed by focusing on composite shape fixity and interfacial stresses. Analytical models show that SMPs can be used to adequately fix the shape of SMA actuators and springs. COMSOL finite element simulations are in agreement with analytical expressions for shape fixity and interfacial stresses. Analytical models are developed for an end-coupled linear SMP–SMA two-way actuator and the predicted strain is shown to be in good agreement with experimental test results.

Original language	English (US)
Article number	12
Journal	Frontiers in Materials
Volume	2
DOIs	https://doi.org/10.3389/fmats.2015.00012
State	Published - Mar 2 2015
Externally published	Yes

Keywords

COMSOL
Interfacial stress
Shape fixity
Shape memory alloy
Shape memory composite
Shape memory polymer

ASJC Scopus subject areas

Materials Science (miscellaneous)

Online availability

10.3389/fmats.2015.00012

Library availability

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title = "Investigation of interfacial shear stresses, shape fixity, and actuation strain in composites incorporating shape memory polymers and shape memory alloys",

abstract = "Shape memory composites (SMCs) based on shape memory alloys (SMAs) and shape memory polymers (SMPs) allow many design possibilities due to their controllable temperature-dependent mechanical properties. The complementary characteristics of SMAs and SMPs can be utilized in systems with shape recovery created by the SMA and shape fixity provided by the SMP. In this research, three SMC operating regimes are identified and the behavior of SMC structures is analyzed by focusing on composite shape fixity and interfacial stresses. Analytical models show that SMPs can be used to adequately fix the shape of SMA actuators and springs. COMSOL finite element simulations are in agreement with analytical expressions for shape fixity and interfacial stresses. Analytical models are developed for an end-coupled linear SMP–SMA two-way actuator and the predicted strain is shown to be in good agreement with experimental test results.",

keywords = "COMSOL, Interfacial stress, Shape fixity, Shape memory alloy, Shape memory composite, Shape memory polymer",

author = "Jungkyu Park and Headings, {Leon M.} and Dapino, {Marcelo J.} and Baur, {Jeffery W.} and Tandon, {Gyaneshwar P.}",

note = "Funding Information: The authors wish to acknowledge the member organizations of the Smart Vehicle Concepts Center (www.SmartVehicleCenter.org), a National Science Foundation Industry/University Cooperative Research Center. Publisher Copyright: {\textcopyright} 2015 Park, Headings, Dapino, Baur and Tandon.",

year = "2015",

month = mar,

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doi = "10.3389/fmats.2015.00012",

language = "English (US)",

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AU - Park, Jungkyu

AU - Headings, Leon M.

AU - Dapino, Marcelo J.

AU - Baur, Jeffery W.

AU - Tandon, Gyaneshwar P.

N1 - Funding Information: The authors wish to acknowledge the member organizations of the Smart Vehicle Concepts Center (www.SmartVehicleCenter.org), a National Science Foundation Industry/University Cooperative Research Center. Publisher Copyright: © 2015 Park, Headings, Dapino, Baur and Tandon.

PY - 2015/3/2

Y1 - 2015/3/2

N2 - Shape memory composites (SMCs) based on shape memory alloys (SMAs) and shape memory polymers (SMPs) allow many design possibilities due to their controllable temperature-dependent mechanical properties. The complementary characteristics of SMAs and SMPs can be utilized in systems with shape recovery created by the SMA and shape fixity provided by the SMP. In this research, three SMC operating regimes are identified and the behavior of SMC structures is analyzed by focusing on composite shape fixity and interfacial stresses. Analytical models show that SMPs can be used to adequately fix the shape of SMA actuators and springs. COMSOL finite element simulations are in agreement with analytical expressions for shape fixity and interfacial stresses. Analytical models are developed for an end-coupled linear SMP–SMA two-way actuator and the predicted strain is shown to be in good agreement with experimental test results.

AB - Shape memory composites (SMCs) based on shape memory alloys (SMAs) and shape memory polymers (SMPs) allow many design possibilities due to their controllable temperature-dependent mechanical properties. The complementary characteristics of SMAs and SMPs can be utilized in systems with shape recovery created by the SMA and shape fixity provided by the SMP. In this research, three SMC operating regimes are identified and the behavior of SMC structures is analyzed by focusing on composite shape fixity and interfacial stresses. Analytical models show that SMPs can be used to adequately fix the shape of SMA actuators and springs. COMSOL finite element simulations are in agreement with analytical expressions for shape fixity and interfacial stresses. Analytical models are developed for an end-coupled linear SMP–SMA two-way actuator and the predicted strain is shown to be in good agreement with experimental test results.

KW - COMSOL

KW - Interfacial stress

KW - Shape fixity

KW - Shape memory alloy

KW - Shape memory composite

KW - Shape memory polymer

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Investigation of interfacial shear stresses, shape fixity, and actuation strain in composites incorporating shape memory polymers and shape memory alloys

Abstract

Keywords

ASJC Scopus subject areas

Online availability

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