Collaborative Research: Stick-slip Dynamics of Micromachined Interfaces

摘要-CMMI-1030322/1030278这项合作研究的目标是识别和模拟在微机械结构中发生可重复的粘滑和稳定滑动行为的关键界面系统。一个中心问题是应用于界面的有机单层涂层的结构与由此产生的动力学相图之间的关系。这项研究将创建一个科学工具集，使研究粘滑和稳定滑动行为成为可能。摩擦测试系统由拉动校准弹簧的长行程高力直线驱动器和施加可控法向力的摩擦块组成。测试设备将由高速摄像机拍摄。基于摩擦的微机械直线驱动器在光学元件的纳米级定位、数据存储、微阀流量控制和微机器人等方面具有广泛的潜在应用，具有重要的技术意义。这种致动器技术有可能给光纤通信、芯片实验室诊断和微组装技术带来革命性的变化。这些执行器的性能和可靠性在很大程度上取决于对接触界面的控制以及对其在各种载荷和环境条件下的行为的了解。S的教育内容包括在卡内基梅隆大学和奥本大学开设免费的高级/研究生选修课，选修课的题目是《实验微纳机械》和《薄膜沉积与表征方法》。暑期交流计划将确保学生学习在每所大学教授的实验技术。外展将通过与高中新闻课程的互动来完成，这些课程将制作视频，激发人们对工程的兴趣。

ABSTRACT - CMMI - 1030322/ 1030278The goal of this collaborative research is to identify and model key interfacial systems in which reproducible stick-slip and steady-sliding behaviors occur in micromachined structures. A central issue is the relationship between the structure of organic monolayer coatings applied to the interfaces, and the resulting kinetic phase diagrams. This study will create a scientific toolset to enable investigations of stick-slip and steady-sliding behavior. The friction test system consists of a long-travel high-force linear actuator pulling a calibrated spring and a friction block to which a controllable normal force is applied. The test apparatus will be imaged by a high-speed video camera. Friction-based micromachined linear actuators have broad potential applications of significant technological importance including nanometer-scale positioning of optical components, data storage, microvalve flow control and microrobotics. This actuator technology holds the potential to revolutionize fiber communications, lab-on-a-chip diagnostics and microassembly techniques. The performance and reliability of these actuators depends strongly on control of the contacting interface and understanding of its behavior under various loading and environmental conditions. The proposal?s educational component includes the development of complimentary Senior/Graduate elective courses at Carnegie Mellon and Auburn Universities, entitled "Experimental Micro- and Nanomechanics" and "Thin Film Deposition and Characterization Methods." A summer exchange program will ensure that students learn experimental techniques taught at each university. Outreach will be accomplished by interacting with high-school journalism classes which will develop videos stimulating interest in engineering.