Collaborative Research: Stick-slip Dynamics of Micromachined Interfaces

摘要/ ABSTRACT摘要：CMMI - 1030322/ 1030278本合作研究的目标是识别和模拟微机械结构中可重复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和由此产生的动力学相图之间的关系。该研究将创建一个科学的工具集，用于研究粘滑和稳定滑动行为。摩擦测试系统由一个长行程高力线性执行器拉动校准弹簧和一个施加可控法向力的摩擦块组成。测试设备将由高速摄像机成像。基于摩擦的微机械线性执行器具有广泛的潜在应用，具有重要的技术意义，包括纳米级光学元件定位，数据存储，微阀流量控制和微型机器人。这种致动器技术有可能彻底改变光纤通信、芯片实验室诊断和微组装技术。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负载和环境条件下行为的理解。这个提议吗?其教育内容包括在卡内基梅隆大学和奥本大学开发免费的高级/研究生选修课程，题为“实验微纳米力学”和“薄膜沉积和表征方法”。一个暑期交换项目将确保学生们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.