Surface Interactions Associated with Contact and InterfacialFracture

9522964列支敦士登这个项目是为了确定可能发生表面相互作用的裂纹面的性质和力与分离规律的关系。一种可能性是，接触带电可能发生在新表面的形成过程中。采用实验/数值相结合的方法提取新裂纹界面力分离数据，以及滑动接触和非滑动接触界面的力分离数据。此外，还将测量电荷和电子发射，以确定表面相互作用中是否涉及静电效应。在这项工作中获得的知识有望用于预测微电子器件、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. ***