Davis-Purcell Benjamin, Soulard Pierre, Salez Thomas, Raphaël Elie, Dalnoki-Veress Kari
Department of Physics & Astronomy, McMaster University, Hamilton, L8S 4M1, Ontario, Canada.
Laboratoire de Physico-Chimie Théorique, UMR CNRS Gulliver 7083, ESPCI Paris, PSL Research University, 10 rue Vauquelin, 75005, Paris, France.
Eur Phys J E Soft Matter. 2018 Mar 22;41(3):36. doi: 10.1140/epje/i2018-11643-6.
In this study, thin elastic films supported on a rigid substrate are brought into contact with a spherical glass indenter. Upon contact, adhesive fingers emerge at the periphery of the contact patch with a characteristic wavelength. Elastic films are also pre-strained along one axis before the initiation of contact, causing the fingering pattern to become anisotropic and align with the axis along which the strain was applied. This transition from isotropic to anisotropic patterning is characterized quantitatively and a simple model is developed to understand the origin of the anisotropy.
在本研究中，将支撑在刚性基板上的薄弹性膜与球形玻璃压头接触。接触时，在接触斑的周边会出现具有特征波长的粘性指状物。在接触开始之前，弹性膜也会沿一个轴进行预应变，从而使指状图案变得各向异性，并与施加应变的轴对齐。定量表征了这种从各向同性到各向异性图案的转变，并开发了一个简单模型来理解各向异性的起源。
