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 Streator该项目是一项为期3年的摩擦接触中毛细效应的实验和理论研究。 所提出的调查的动机是越来越小的形状因子的技术趋势，导致更高的表面积与体积比和液体介导的界面粘附的重要性越来越大。 负毛细管压力的直接测量将进行与几种不同的液体在亚微米界面间距，在动态条件下。 要研究的液体包括选定的全氟聚醚（PFPE）油以及水。 将研究液体性质如分子量、粘度、极性和表面张力的影响。 数学建模将结合实验进行。 预计这项工作将导致更好的摩擦接触中的毛细效应模型，从而提供改进的数学工具的微和纳米系统设计师。 研究生和本科生将接触到现代实验和计算方法，并将学习液体介导接触的基本原理。 此外，将作出特别努力，通过利用现有的NSF赞助的计划在格鲁吉亚理工学院，提供研究生奖学金和本科生研究基金，以工程和科学的代表性不足的学生参与本项目。