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Giant deformations and soft-inflation in LCE balloons

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Giudici, andrea 

Abstract

We propose that ballooning can be controlled, enriched and amplified by using rubbery networks of aligned molecular rods known as liquid crystal elastomers (LCEs). Firstly, LCEs are promising artificial muscles, showing large spontaneous deformations in response to heat and light. In LCE balloons, spontaneous deformations can trigger classic ballooning, either as phase- separation (at constant volume) or a volume jump (at constant pressure), resulting in greatly magnified actuation strains. Secondly, even at constant temperature, LCEs have unusual mechanics augmented by soft-modes of deformation in which the nematic director rotates within the elastomer. These soft modes enrich the mechanics of LCE balloons, which can also “balloon” between rotated and unrotated states, either during the classic instability, or as a separate pre-cursor, leading to successive instabilities during inflation.

Description

Keywords

5107 Particle and High Energy Physics, 51 Physical Sciences

Journal Title

Europhysics Letters: a letters journal exploring the frontiers of physics

Conference Name

Journal ISSN

0295-5075
1286-4854

Volume Title

Publisher

IOP Publishing

Rights

All rights reserved
Sponsorship
EPSRC (2108804)
MRC (MR/S017186/1)