Modeling helicoid to spiral-ribbon transitions of twist-nematic elastomers
Modeling helicoid to spiral-ribbon transitions of twist-nematic elastomers
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DOI：
10.1039/c3sm27491h
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发表时间：
2013-01-01
期刊：
影响因子：
3.4
通讯作者：
Varano, Valerio
中科院分区：
文献类型：
--
作者：
Teresi, Luciano;Varano, Valerio
向列型弹性体（内斯）具有非常有趣的性质，源于液晶有序性和橡胶弹性之间的相互作用。对于这样的材料，从各向同性相的热诱导相变的α相可能会引起非常大的扭曲，这反过来又会影响宏观试样的整体配置。内斯的行为可以很好地模拟在有限弹性理论的扭曲，在这里，我们测试的理论模型对花式形状的形成，特别是，我们处理的许多不同的形状，一个薄，细长的酒吧，NE制成，可能承担作为其手征对称性的结果，在溶剂蒸发和随后的加热。我们的目标是复制与数值实验的手性内斯的形状形成的现象，我们的研究结果构成了一个值得注意的评估的物理模型的数值解。
Nematic Elastomers (NEs) possess very interesting properties stemming from the interaction between liquid crystal order and rubber elasticity. For such materials, thermally induced phase transition from the isotropic to the nematic phase may induce very large distortions, which in turn can affect the overall configuration of a macroscopic specimen. The behavior of NEs can be well modeled within the theory of finite elasticity with distortions; here, we test a theoretical model against fancy shapes formation; in particular, we deal with the many different shapes that a thin, slender bar, made of NE, may assume as a consequence of its chiral symmetry during solvent evaporation and subsequent heating. Our goal has been to replicate with numerical experiments the phenomena of shape formation in chiral NEs, and our results constitute a noteworthy assessment of the physical model underlying the numerical solutions.