液体表面非均匀薄膜失稳的力学研究  

The instability of a fluid-supported inhomogeneous film:A mechanical viewpoint

作　　者：张正才 张满弓 甯尤军[1] 吴涛[2] 宁慧铭[3] 古斌 贾飞[1] ZHANG Zhengcai1, ZHANG Mangong2 , NING Youjun1 , WU Tao2 , NING Huiming3 , GU Bin1, JIA Fei1(1. School of Manufacturing Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P.R.China; 2. Wuhan Second Ship Design and Research Institute, Wuhan 430205, P.R.China; 3. College of Aerospace Engineering, Chongqing University, Chongqing 400044, P.R.Chin)

机构地区：[1]西南科技大学制造科学与工程学院,四川绵阳621010 [2]武汉第二船舶设计研究所,武汉430205 [3]重庆大学航空航天学院,重庆400044

出　　处：《重庆大学学报（自然科学版）》2018年第5期30-36,共7页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(11402217;11772276)~~

摘　　要：以液体为基底的膜基系统广泛存在于自然界中,并且在功能表面制备等工程领域中广泛应用。从力学角度对液体表面非均匀薄膜的失稳过程进行研究,建立了几何和材料非均匀性与薄膜失稳模式的关系。采用数值模拟手段,研究了缺陷部分的长度、位置和弹性模量参数对薄膜表面失稳形貌演化过程的影响。通过实验实现带有预制缺陷的聚酯(PET,polyethylene terephthalate)薄膜在水表面的失稳,得到了与数值模拟结果相一致的失稳形貌,进一步利用预先涂覆未固化模具胶的方法,将失稳形貌复制形成模具。研究工作可以为液体表面薄膜失稳形貌的优化设计提供指导,并为特定特殊形貌薄膜的制备提供途径。The system with a film supported by fluid substrate can be widely found in nature and has important applications in engineering fields such as functional surface preparation.This work focuses on the instability mechanism of a fluid-supported inhomogeneous film,and establishes the relationship between geometric and material inhomogeneity and film instability mode.The effects of the length,position and elastic modulus of the defect on the evolution of the film surface instability morphology are studied by numerical simulation.Experiments of the instability of polyester film with prefabricated defects on the water surface are realized by self-designed devices,and the experimental results show that the instability morphology is consistent with the numerical simulation results.By pre-coating the uncured molding gel on the film,the molding gel can copy the instability morphology to form a mold.This work provides not onlyguidance for the optimal design of the fluid-supported film instability morphology,but also an approach for the preparation of films with specified special morphologies.

关 键 词：薄膜 缺陷 液体基底 数值模拟 薄膜制备 

分 类 号：O341[理学—固体力学]