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Data associated with 'Mechanical deformations of a liquid crystal elastomer at director angles between 0˚ and 90˚: Deducing an empirical model encompassing anisotropic nonlinearity'
Mistry, Devesh and Gleeson, Helen (2019) Data associated with 'Mechanical deformations of a liquid crystal elastomer at director angles between 0˚ and 90˚: Deducing an empirical model encompassing anisotropic nonlinearity'. University of Leeds. [Dataset] https://doi.org/10.5518/715
Dataset description
Despite the wealth of studies reporting mechanical properties of Liquid Crystal Elastomers (LCEs), no theory can currently describe their complete mechanical anisotropy and nonlinearity. Our paper presents the first comprehensive study of mechanical anisotropy in an all-acrylate LCE via tensile tests that simultaneously track liquid crystal director rotation. We then use an empirical approach to gain a deeper insight into the LCE’s mechanical responses at values of strain, up to 1.5, for initial director orientations between 0˚ and 90˚. Using a method analogous to time-temperature superposition, we create master curves for the LCE’s mechanical response and use these to deduce a model that accurately predicts the load curve of the LCE for stresses applied at angles between 15° and 70° relative to the initial liquid crystal director. This LCE has been shown to exhibit auxetic behaviour for deformations perpendicular to the director. Interestingly, our empirical model predicts that the LCE will further demonstrate auxetic behaviour when stressed at angles between 54° and 90° to the director. Our approach could be extended to any LCE, so represents a significant step forward toward models which would aid the further development of LCE theory, and the design and modelling of LCE-based technologies. The data set associated with these studies are included here.
| Keywords: | liquid crystal elastomer, director, mechanical deformation, anisotropy | ||||||
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| Subjects: | F000 - Physical sciences > F300 - Physics | ||||||
| Divisions: | Faculty of Engineering and Physical Sciences > School of Physics and Astronomy | ||||||
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| License: | Creative Commons Attribution 4.0 International (CC BY 4.0) | ||||||
| Date deposited: | 09 Sep 2019 11:00 | ||||||
| URI: | http://archive.researchdata.leeds.ac.uk/id/eprint/573 | ||||||
Files
Documentation
Readme [1kB]  |
Readme [1kB] 
Readme [1kB] Data
figure 3 true stress load curves zip [988kB] |
figure 4 initial moduli [201kB] |
figure 5 director rotation BTW [273kB] |
figure 6 true modulus vs. director angle [132kB] |
figure 7 transposing director and load curves [204kB] |
figure 8 master load curve [109kB] |
figure 9 predicted load curves [504kB] |
figure 10 yz strains [243kB] |
figure 11 predicted geometries [585kB] |
figure S1 engineering load curves [146kB] |
figure S2 [395kB] |
gnuplot liinestiles [964B] |