A predictive theoretical model for stretch-induced instabilities in liquid crystal elastomers

Following the experimental lead, we construct a general mathematical model which, depending on whether the uniaxial scalar order parameter is constant or not, can predict either the classical shear striping instability or the molecular auxetic response and mechanical Fréedericksz transition observed...

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Bibliographic Details
Published inLiquid crystals Vol. 50; no. 7-10; pp. 1426 - 1438
Main Authors Mihai, L. Angela, Raistrick, Thomas, Gleeson, Helen F., Mistry, Devesh, Goriely, Alain
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 09.08.2023
Taylor & Francis Ltd
Subjects
auxeticity
Elastomers
Freedericksz transitions
large strain deformation
Liquid crystal elastomer
Liquid crystals
mathematical modelling
Mathematical models
non-linear elasticity
Order parameters
shear striping
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Summary:Following the experimental lead, we construct a general mathematical model which, depending on whether the uniaxial scalar order parameter is constant or not, can predict either the classical shear striping instability or the molecular auxetic response and mechanical Fréedericksz transition observed in different liquid crystal elastomers. Our theoretical model can shed some light on the role of nematic order in these stretch-induced mechanical instabilities not observed in conventional rubber-like solids.
ISSN:0267-8292
1366-5855
DOI:10.1080/02678292.2022.2161655