Artificial sunflower: Light-induced deformation of photoactive shells

IF 4.3 3区 工程技术 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Sathvik Sanagala, Kaushik Bhattacharya
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引用次数: 0

Abstract

Photomechanically active materials undergo reversible deformation on illumination, making them ideal for remote, tether-free actuation. Much of the work on these materials has focused on one-dimensional structures, such as strips. In this paper, we explore photomechanically active two-dimensional structures such as sheets and shells. When illuminated, such structures undergo spontaneous bending due to the limited penetration of light. However, the geometry of the shell constrains possible deformation modes: changes in Gauss curvature lead to in-plane stretching, against which shells are very stiff. Therefore, there is a complex coupling between the photomechanical actuation and the mechanical behavior of a shell. We develop and implement a novel approach to study photomechanically active shells. This method is a discrete shell model which captures the interplay between actuation, stretching, bending, and geometric changes. Through a series of examples, we explore these complex interactions, demonstrating how one can design shells that deform to follow the source of illumination.
人造向日葵:光活性壳的光致变形
光力学活性材料在光照下发生可逆变形,使其成为远程无系绳驱动的理想选择。这些材料的大部分工作都集中在一维结构上,比如条状结构。在本文中,我们探索光力学活性二维结构,如片和壳。当被照射时,由于光的有限穿透,这种结构发生自发弯曲。然而,壳的几何形状限制了可能的变形模式:高斯曲率的变化导致面内拉伸,壳非常坚硬。因此,壳体的光电驱动与力学行为之间存在着复杂的耦合关系。我们开发并实现了一种新的方法来研究光力学活性壳。这种方法是一个离散壳模型,它捕获了驱动、拉伸、弯曲和几何变化之间的相互作用。通过一系列的例子,我们探索这些复杂的相互作用,展示了如何设计变形的外壳,以遵循照明的来源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Extreme Mechanics Letters
Extreme Mechanics Letters Engineering-Mechanics of Materials
CiteScore
9.20
自引率
4.30%
发文量
179
审稿时长
45 days
期刊介绍: Extreme Mechanics Letters (EML) enables rapid communication of research that highlights the role of mechanics in multi-disciplinary areas across materials science, physics, chemistry, biology, medicine and engineering. Emphasis is on the impact, depth and originality of new concepts, methods and observations at the forefront of applied sciences.
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