标题： 一种耦合混合模式粘聚区模型：对三维接触问题的扩展 显示英文标题

标题： A coupled mixed-mode cohesive zone model: An extension to three-dimensional contact problems

摘要： 在本研究中，提出了一种现象学的三维耦合（3DC）混合模式粘聚区模型（CZM）。这是通过将广为人知的徐和尼德尔曼（XN）指数CZM的一个改进版本扩展到三维接触问题来实现的。对于法向和横向方向，分别给出了耦合的牵引-分离关系。所提出的模型保留了XN模型的所有基本特性，并且能够正确描述混合模式分离，特别是混合模式闭合条件。此外，它提供了显式考虑间隙函数三个分量的可能性，即不同方向上的分离。3DC模型有一些独立参数，即界面属性，类似于XN模型。所有粘聚区参数都可以通过I型和II型实验确定。 显示英文摘要

摘要： In this study a phenomenological three-dimensional coupled (3DC) mixed-mode cohesive zone model (CZM) is proposed. This is done by extending an improved version of the well established exponential CZM of Xu and Needleman (XN) to 3D contact problems. Coupled traction-separation relationships are individually presented for normal and transverse directions. The proposed model preserves all the essential features of the XN model and yet correctly describes mixed-mode separation and in particular mixed-mode closure conditions. Moreover, it provides the possibility to explicitly account for all three components of the gap function, i.e. separations in different directions. The 3DC model has some independent parameters, i.e. interface properties, similar to the XN model. All the cohesive zone parameters can be determined using mode-I and mode-II experiments.