Normal and Shear Stresses in Dynamic, Submicron Liquid Bridges

动态亚微米液桥中的法向应力和剪切应力

• 批准号: 0200681
• 负责人: Jeffrey Streator
• 金额: --
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-05-15 至 2007-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0200681&HistoricalAwards=false
• 关键词: Normal; Shear; Stresses; Dynamic; Submicron

0200681StreatorThis project is a 3-year experimental and theoretical investigation of capillary effects in tribological contacts. The proposed investigation is motivated by the technological trend for smaller and smaller form factors, leading to higher surface-area-to-volume ratios and an increasing significance of liquid-mediated interfacial adhesion. Direct measurements of negative capillary pressures will be conducted with several different liquids at sub-micron interfacial spacings, under dynamic conditions. The liquids to be studied include selected perfluoropolyether (PFPE) oils as well as water. The effects of liquid properties such a molecular weight, viscosity, polarity and surface tension will be investigated. Mathematical modeling will be conducted in conjunction with the experiments. It is anticipated that this work will lead to better models of capillary effects in tribological contacts, thereby providing micro- and nano-system designers with improved mathematical tools. Graduate and undergraduate students will be exposed to modern experimental and computational methods, and will learn fundamentals of liquid-mediated contact. Additionally, special efforts will be made to involve under-represented students in this project by taking advantage of an existing NSF-sponsored program at Georgia Tech that provides graduate stipends and undergraduate research funds to under-represented students in engineering and science.

0200681 Streatortors项目是对摩擦学接触中毛细血管效应的3年实验和理论研究。 拟议的研究是由越来越小的形式因素的技术趋势激发的，导致表面区域与体积比率更高，并且液体介导的界面粘附的重要性越来越大。 在动态条件下，将用在亚微米界面间距处用几种不同的液体进行负毛细管的直接测量。 要研究的液体包括选定的全氟球纤维（PFPE）油和水。 将研究液体特性的影响，例如分子量，粘度，极性和表面张力。 数学建模将与实验结合进行。 可以预料，这项工作将导致更好的毛细血管效应模型，从而为微型和纳米系统设计师提供改进的数学工具。 研究生和本科生将接触现代实验和计算方法，并将学习液体介导的接触的基础。 此外，还将通过利用佐治亚理工学院现有的NSF赞助计划来使代表性不足的学生参与该项目的特殊努力，该计划为工程和科学的代表性不足的学生提供了研究生津贴和本科研究资金。