ABSTRACT

A compressively stressed poly (dimethylsiloxane) (PDMS) film with a sputtered gold film can buckle owing to the difference between the Young’s modulus of the PDMS film and that of the gold film. The instability of stress is observed at the interface between materials with different Young’s modulus. The experiment conducted in this study revealed the important factors that affect the evolution of strips at certain angles at which tensile stress is applied to the elastomer with a ripple pattern. Strips cannot withstand shear stress applied in two different directions simultaneously, resulting in the formation of grids at other angles. Therefore, a dislocation-like movement was observed, proving that Y type dislocations-like exist as well as the displacement of the earth’s crust. The fractured surfaces on top of the gold film helped form a pyramid-like pattern. The movement of the dislocation-like and herringbone patterns was recorded using an optical microscope.

摘要

带有溅射金膜的压缩应力聚二甲基硅氧烷（PDMS）膜可能会弯曲，这是因为PDMS膜的杨氏模量与金膜的杨氏模量不同。在具有不同杨氏模量的材料之间的界面处观察到应力的不稳定性。在这项研究中进行的实验揭示了一些重要因素，这些因素在一定角度下影响带材的演变，在这些角度下，将应力施加到具有波纹图案的弹性体上。条带不能同时承受在两个不同方向上施加的剪切应力，从而导致以其他角度形成网格。因此，观察到类似位错的运动，证明存在Y型位错以及地壳的位移。金膜顶部的断裂表面有助于形成金字塔状的图案。使用光学显微镜记录位错样和人字形图案的运动。