Stimulus responsive elastomers are advanced engineered materials that perform desired functionalities when triggered by external stimuli. Liquid crystal elastomers (LCEs) are one important example that exhibit reversible actuation when cycled above and below their nematic-to-isotropic transition temperature. Here, we propose a micromechanical-based model that is centered on the evolution of the chain distribution tensor of the LCE network. Our model, framed within the statistical model of the chain network, enables a mesoscale description of their mechanical response under an external thermal stimulus. We compare the model to prior experimental observations of the bending response of 3D printed LCE elements with controlled director alignment.

A MICROMECHANICAL-BASED MODEL OF STIMULUS RESPONSIVE LIQUID CRYSTAL ELASTOMERS / Roberto Brighenti; Connor G. McMahan; Mattia P. Cosma; Arda Kotikian; Jennifer A. Lewis; Chiara Daraio. - In: INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES. - ISSN 0020-7683. - 219-220:(2021), pp. 92-105. [10.1016/j.ijsolstr.2021.02.023]

A MICROMECHANICAL-BASED MODEL OF STIMULUS RESPONSIVE LIQUID CRYSTAL ELASTOMERS

Roberto Brighenti;
2021

Abstract

Stimulus responsive elastomers are advanced engineered materials that perform desired functionalities when triggered by external stimuli. Liquid crystal elastomers (LCEs) are one important example that exhibit reversible actuation when cycled above and below their nematic-to-isotropic transition temperature. Here, we propose a micromechanical-based model that is centered on the evolution of the chain distribution tensor of the LCE network. Our model, framed within the statistical model of the chain network, enables a mesoscale description of their mechanical response under an external thermal stimulus. We compare the model to prior experimental observations of the bending response of 3D printed LCE elements with controlled director alignment.
2021
219-220
92
105
Roberto Brighenti; Connor G. McMahan; Mattia P. Cosma; Arda Kotikian; Jennifer A. Lewis; Chiara Daraio
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1328031
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