考虑微尺度黏附效应的磁电复合材料接触力学分析

磁电复合材料元器件的发展趋势是微型化、集成化、智能化、高灵敏度和高可靠性。微尺度黏附接触是制约微型/集成化高性能磁电元器件发展的瓶颈。本项目将建立磁电复合材料在无摩擦、滑动摩擦、非滑动等情形中的微尺度黏附接触模型，以及相应的粗糙黏附接触模型；发展有效的解析法(包括降维法)、小波高效数值格式的半解析法、有限元、实验测试等方法来求解、验证；揭示压头尺寸、磁电耦合效应、力-磁-电表/界面条件、摩擦、非滑动、表面粗糙度等因素对黏附接触行为的影响机制，搭建微结构参数和宏观性能之间的桥梁。项目将界定不同黏附理论在磁电弹多场耦合中的适用范围；探寻改善表面黏附接触损伤,提升粗糙界面磁电耦合性能和安全性能的调控方法；提出改进原子力显微镜及纳米压痕仪的建议。项目成果将为新一代磁电元器件的设计、制造、使用和检测提供理论支撑，服务于大数据存储、人工智能等蓬勃发展的高新科技领域，并将丰富接触力学和多场耦合力学内容。

The development trend of functional devices made of magnetoelectric composites is of miniaturization, integration, intelligence, high sensitivity and high reliability. Micro-scale adhesive contact is an obstacle of restricting the micro/integrated magnetoelectric devices with high efficiency. This project will develop some micro-scale adhesive contact models of magnetoelectric composites including frictionless, sliding frictional and non-sliding kinds, and the corresponding rough adhesive contact models. Some effective methods, such as analytical methods including methods of dimensionality reduction, semi-analytical methods with efficient wavelet-based numerical algorithm, FEM methods and experimental methods, will be developed to solve and validate the established models. This project will reveal the mechanisms of the punch size, magnetoelectric coupling effect, magneto-electric-elastic surface/interface conditions, friction, non-slipping, surface roughness and other physical factors on the adhesive contact behavior, and establish the relationship between microstructure parameters and macroscopic properties. The scope of different adhesive theories will be determined subject to magneto-electro-elastic coupling. The scheme of improving surface adhesive contact damage, and lifting magnetoelectric coupling property and safety performance at the rough surface/interface of magnetoelectric composites and intelligent structure will be proposed. Suggestions for improving atomic force microscope and nanoindentation instrument will be presented. The project results will provide theoretical support for the design, manufacture, use and detect of the new generation devices made of magnetoelectric composites to serve the booming high-tech fields such as big data storage and artificial intelligence, and will enrich the content of contact mechanics and multi-field coupling mechanics.