Tunable wrinkling of thin nematic liquid crystal elastomer sheets

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Tunable wrinkling of thin nematic liquid crystal elastomer sheets. / Krieger, Madison S.; Dias, Marcelo A.

I: Physical Review E, Bind 100, Nr. 2, 022701, 08.2019.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

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Krieger, Madison S. ; Dias, Marcelo A. / Tunable wrinkling of thin nematic liquid crystal elastomer sheets. I: Physical Review E. 2019 ; Bind 100, Nr. 2.

Bibtex

@article{67e66473905f489fa26bdb5116693b91,
title = "Tunable wrinkling of thin nematic liquid crystal elastomer sheets",
abstract = "Instabilities in thin elastic sheets, such as wrinkles, are of broad interest both from a fundamental viewpoint and also because of their potential for engineering applications. Nematic liquid crystal elastomers offer a new form of control of these instabilities through direct coupling between microscopic degrees of freedom, resulting from orientational ordering of rodlike molecules, and macroscopic strain. By a standard method of dimensional reduction, we construct a plate theory for thin sheets of nematic elastomer. We then apply this theory to the study of the formation of wrinkles due to compression of a thin sheet of nematic liquid crystal elastomer atop an elastic or fluid substrate. We find the scaling of the wrinkle wavelength in terms of material parameters and the applied compression. The wavelength of the wrinkles is found to be nonmonotonic in the compressive strain due to the presence of the nematic. Finally, due to soft modes, the critical stress for the appearance of wrinkles can be much higher than in an isotropic elastomer and depends nontrivially on the manner in which the elastomer was prepared.",
keywords = "ELASTIC SHEET, CURVATURE, MECHANICS, PATTERNS, REORIENTATION, GROWTH, FILMS",
author = "Krieger, {Madison S.} and Dias, {Marcelo A.}",
year = "2019",
month = aug,
doi = "10.1103/PhysRevE.100.022701",
language = "English",
volume = "100",
journal = "Physical Review E",
issn = "2470-0045",
publisher = "American Physical Society",
number = "2",

}

RIS

TY - JOUR

T1 - Tunable wrinkling of thin nematic liquid crystal elastomer sheets

AU - Krieger, Madison S.

AU - Dias, Marcelo A.

PY - 2019/8

Y1 - 2019/8

N2 - Instabilities in thin elastic sheets, such as wrinkles, are of broad interest both from a fundamental viewpoint and also because of their potential for engineering applications. Nematic liquid crystal elastomers offer a new form of control of these instabilities through direct coupling between microscopic degrees of freedom, resulting from orientational ordering of rodlike molecules, and macroscopic strain. By a standard method of dimensional reduction, we construct a plate theory for thin sheets of nematic elastomer. We then apply this theory to the study of the formation of wrinkles due to compression of a thin sheet of nematic liquid crystal elastomer atop an elastic or fluid substrate. We find the scaling of the wrinkle wavelength in terms of material parameters and the applied compression. The wavelength of the wrinkles is found to be nonmonotonic in the compressive strain due to the presence of the nematic. Finally, due to soft modes, the critical stress for the appearance of wrinkles can be much higher than in an isotropic elastomer and depends nontrivially on the manner in which the elastomer was prepared.

AB - Instabilities in thin elastic sheets, such as wrinkles, are of broad interest both from a fundamental viewpoint and also because of their potential for engineering applications. Nematic liquid crystal elastomers offer a new form of control of these instabilities through direct coupling between microscopic degrees of freedom, resulting from orientational ordering of rodlike molecules, and macroscopic strain. By a standard method of dimensional reduction, we construct a plate theory for thin sheets of nematic elastomer. We then apply this theory to the study of the formation of wrinkles due to compression of a thin sheet of nematic liquid crystal elastomer atop an elastic or fluid substrate. We find the scaling of the wrinkle wavelength in terms of material parameters and the applied compression. The wavelength of the wrinkles is found to be nonmonotonic in the compressive strain due to the presence of the nematic. Finally, due to soft modes, the critical stress for the appearance of wrinkles can be much higher than in an isotropic elastomer and depends nontrivially on the manner in which the elastomer was prepared.

KW - ELASTIC SHEET

KW - CURVATURE

KW - MECHANICS

KW - PATTERNS

KW - REORIENTATION

KW - GROWTH

KW - FILMS

U2 - 10.1103/PhysRevE.100.022701

DO - 10.1103/PhysRevE.100.022701

M3 - Journal article

C2 - 31574719

VL - 100

JO - Physical Review E

JF - Physical Review E

SN - 2470-0045

IS - 2

M1 - 022701

ER -