Actuation of cylindrical nematic elastomer balloons
Actuation of cylindrical nematic elastomer balloons
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DOI：
10.1063/5.0041288
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发表时间：
2021-03-21
影响因子：
3.2
通讯作者：
Bhattacharya, Kaushik
中科院分区：
文献类型：
--
作者：
Lee, Victoria;Bhattacharya, Kaushik
向列型弹性体是可编程的软材料，其在外部刺激（例如温度或光的变化）下显示大的、可逆的和可预测的变形。虽然该领域的大部分工作都集中在平板的驱动上，但3D打印和其他定向合成方法的最新进展激发了对弯曲壳体驱动的研究。快速屈曲一直是人们特别感兴趣的话题。在这项工作中，我们提出了理论计算，激发另一种模式的驱动，结合可编程软材料以及与大变形相关的不稳定性。具体来说，我们分析了一个圆柱形外壳的图案化的弹性体在压力下的变形，表明它可以经历一个巨大的变化，随着温度的变化，体积，并建议其应用程序作为一个泵具有极高的喷射分数。
Nematic elastomers are programmable soft materials that display large, reversible, and predictable deformation under an external stimulus such as a change in temperature or light. While much of the work in the field has focused on actuation from flat sheets, recent advances in 3D printing and other methods of directed synthesis have motivated the study of actuation of curved shells. Snap-through buckling has been a topic of particular interest. In this work, we present theoretical calculations to motivate another mode of actuation that combines programmable soft materials as well as instabilities associated with large deformation. Specifically, we analyze the deformation of a cylindrical shell of a patterned nematic elastomer under pressure, show that it can undergo an enormous change of volume with changing temperature and suggest its application as a pump with extremely high ejection fraction.