Surface Interactions Associated with Contact and InterfacialFracture

9522964 Alberti该项目旨在确定裂纹面的性质以及可能发生表面相互作用的力与分离定律。 一种可能性是在新表面形成期间可能发生接触带电。 将采用实验/数值相结合的方法提取新裂纹界面和已进入滑动接触和非滑动接触的界面的力分离数据。 这些将通过测量充电和电子发射来补充，以确定静电效应是否参与表面相互作用。 在这项工作中获得的知识预计将是有用的，在预测微电子器件，涂层和粘接接头的耐久性。 ***

9522964 Liechti This project is to determine the nature of and the force vs. separation laws for crack faces where surface interactions may be occurring. One possibility is that contact electrification may be taking place during the formation of the new surfaces. A combined experimental/numerical approach will be used to extract the force separation data for freshly cracked interfaces and those interfaces that have been brought into sliding contact and non-sliding contact. These will be complemented by measurements of charging and electron emission in order to determine if electrostatic effects are involved in the surface interactions. The knowledge obtained in this work is expected to be useful in predicting the durability of microelectronic devices, coatings and adhesively bonded joints. ***