Swelling-induced deformations: a materials-defined transition from macroscale to microscale deformations
Swelling-induced deformations: a materials-defined transition from macroscale to microscale deformations
复制标题
DOI：
10.1039/c3sm00135k
复制
发表时间：
2013-01-01
期刊：
影响因子：
3.4
通讯作者：
Holmes, Douglas P.
中科院分区：
文献类型：
--
作者：
Pandey, Anupam;Holmes, Douglas P.
膨胀引起的变形在许多生物和工业环境中很常见，并且出现的形状和模式可以在许多长度尺度上变化。在这里，我们提出了一个实验研究的宏观结构弯曲和微观表面折痕之间的过渡，弹性梁不均匀膨胀有利的溶剂。我们证明了这种转变是由系统的材料和几何形状决定的，并且我们基于弯曲和膨胀能量之间的竞争建立了一个简单的缩放模型，该模型可以预测给定的溶剂液滴是否会在宏观或微观上使聚合物结构变形。我们演示了如何适当调整材料和几何结构可以在单一结构的多个长度尺度上产生不稳定性。
Swelling-induced deformations are common in many biological and industrial environments, and the shapes and patterns that emerge can vary across many length scales. Here we present an experimental study of a transition between macroscopic structural bending and microscopic surface creasing in elastomeric beams swollen non-homogeneously with favorable solvents. We show that this transition is dictated by the materials and geometry of the system, and we develop a simple scaling model based on competition between bending and swelling energies that predicts if a given solvent droplet would deform a polymeric structure macroscopically or microscopically. We demonstrate how proper tuning of materials and geometry can generate instabilities at multiple length scales in a single structure.