Dynamic competition of inflation and delamination in the finite deformation of thin membranes
Dynamic competition of inflation and delamination in the finite deformation of thin membranes
复制标题
薄膜有限变形中膨胀和分层的动态竞争
DOI：
10.1039/c9sm00988d
复制
发表时间：
2019
期刊：
影响因子：
3.4
通讯作者：
Vernerey, Franck J.
中科院分区：
文献类型：
--
作者：
Benet, Eduard;Vernerey, Franck J.
水泡分层和生长的力学在医学（皮肤病理学和细胞膜力学）、材料（粘合和断裂）或软机器人（驱动和变形）等多个领域发挥着重要作用。在这种情况下，水泡的行为通常很难掌握，因为它是由两个高度非线性和时间依赖性过程的相互作用产生的：膜附着和与基材的脱聚。在目前的工作中，我们基于实验系统设计了一种简化的方法来预测泡罩在各种条件下的变形路径。为此，我们考虑了由粘附在刚性基材上的类橡胶膜制成的水泡生长的问题，并开发了一个理论和实验框架来研究其稳定性和生长。我们首先构建粘弹性气泡生长的理论模型，随后通过实验装置进行验证。我们表明，气泡的生长是由两种不稳定性之间的竞争控制的：一种是橡胶固有的，另一种是与基材的粘合性有关的。利用这些概念，我们表明可以通过控制两个参数来实现“目标”稳定的泡罩形状：薄膜厚度和充气速率。
The mechanics of blister delamination and growth plays a major role in a diversity of areas including medicine (skin pathology and mechanics of cell membranes), materials (adhesive and fracture) or soft robotics (actuation and morphing). The behavior of a blister in this context is typically difficult to grasp as it arises from the interplay of two highly nonlinear and time-dependent processes: membrane attachment and decohesion from a substrate. In the present work, we device a simplified approach, based on experimental systems, to predict the deformation path of a blister under various conditions. For this, we consider the problem of a growing blister made of a rubber-like membrane adhered on a rigid substrate, and develop a theoretical and experimental framework to study its stability and growth. We start by constructing a theoretical model of viscoelastic blister growth which we later validate with an experimental setup. We show that blister growth is controlled by the competition between two instabilities: one inherent to the rubber, and a second one pertaining to the adhesion with the substrate. Using these concepts, we show that a “targeted” stable blister shape can be achieved by controlling two parameters: the thickness of the film and the inflation rate.