Surface Interactions Associated with Contact and InterfacialFracture

9522964 Liechti 该项目旨在确定可能发生表面相互作用的裂纹面的性质以及力与分离定律。 一种可能性是在新表面的形成过程中可能发生接触带电。 将使用实验/数值相结合的方法来提取新破裂界面以及已发生滑动接触和非滑动接触的界面的力分离数据。 这些将通过充电和电子发射的测量来补充，以确定静电效应是否参与表面相互作用。 这项工作中获得的知识预计将有助于预测微电子设备、涂层和粘合接头的耐用性。 ***

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. ***