Dynamic Friction Models for Micro and Nanosystems

微纳米系统的动态摩擦模型

• 批准号: 0414298
• 负责人: Kimberly Foster
• 金额: $ 9.03万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-04-15 至 2005-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0414298&HistoricalAwards=false
• 关键词: Dynamic; Friction; Models; Micro; Nanosystems

Dynamic friction models for micro and nano-systemsAbstract: The purpose of this project is to combine unique experiments with a long tradition of friction modeling to develop dynamic models of friction that can be used for friction compensation in NEMS and MEMS systems. The availability of unique experimental equipment, the Hysitron nanoindenter in the Microsystems Characterization Lab at UCSB offers interesting possibilities to improve the state of the art of friction models through precise experiments. The PI and Co-PI bring together expertise in modeling and experimental microscale mechanics to attempt to model the observed experimental phenomena. An interesting property of the microindenter is that is may be possible to make similar experiments in different scales by changing the tip design. This may make it possible to compare friction atomic and macro-scale in similar experiments.The intellectual merit of this proposal lie in the ability to not only create physically based friction models, but in performing precise experiments which will verify such models, and yield improved ones. In this feasibility study (exploratory basic research) the team intends to explore what can be done with the nanoindenter and to make a preliminary investigation of improved friction models. A particular focus will be on the nature of friction forces for small displacements at slow velocities. The hypothesis is that such experiments will give considerable insight. If this is true there is significant scope for a more elaborate research program including both the nano and the macro scale. Both the PI and the Co-PI are very active in education of undergraduates. Should this project be successful, undergraduate researchers will be involved though REU supplements. In addition, the models developed will be incorporated into the MEMS curriculum in the undergraduate Mechanical Engineering courses at UCSB. As this is a one-year SGER, preliminary work will be primarily research-based, and many broader impact outcomes will occur after the duration of the funding.

动态摩擦模型为micro和nanosystemsAbstract：本项目的目的是联合收割机独特的实验与摩擦建模的悠久传统，开发动态模型的摩擦，可用于摩擦补偿NEMS和MEMS系统。UCSB微系统表征实验室的独特实验设备Hysitron纳米压痕仪的可用性为通过精确实验改善摩擦模型的最新技术提供了有趣的可能性。 PI和Co-PI汇集了建模和实验微尺度力学方面的专业知识，试图对观察到的实验现象进行建模。微压头的一个有趣的特性是，通过改变针尖的设计，可以在不同的尺度上进行类似的实验。这使得在类似的实验中比较原子尺度和宏观尺度的摩擦成为可能。这一建议的智力价值在于不仅能够创建基于物理的摩擦模型，而且能够进行精确的实验来验证这些模型，并产生改进的模型。在这项可行性研究（探索性基础研究）中，该团队打算探索使用纳米压头可以做些什么，并对改进的摩擦模型进行初步调查。一个特别的重点将是在低速小位移的摩擦力的性质。假设是这样的实验将提供相当多的洞察力。如果这是真的，那么就有很大的空间来进行更精细的研究计划，包括纳米和宏观尺度。PI和Co-PI在大学生教育中非常活跃。如果这个项目是成功的，本科研究人员将参与，虽然REU补充。此外，开发的模型将被纳入UCSB机械工程本科课程的MEMS课程。由于这是一个为期一年的SGER，初步工作将主要以研究为基础，许多更广泛的影响成果将在资助期限后产生。