层状准晶智能复合材料的力学行为研究

项目名称： 层状准晶智能复合材料的力学行为研究

项目编号： No.11472299

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 高阳

作者单位： 中国农业大学

项目金额： 95万元

中文摘要： 准晶材料是近三十年来发现的新型结构材料，主要作为表面改性材料应用于结构材料中。本项目以准晶智能复合材料/结构为研究对象，推广类Stroh 理论和层状结构传播矩阵技术，构建典型的准晶智能层状结构的力学模型。采用理论、数值和实验分析相结合的方法，建立层状结构破坏的损伤演化过程的界面力学模型，揭示准晶智能复合材料/结构界面的性能劣化和破坏失效机理，深化对准晶复合材料的力学行为和功能控制的研究。 本项目探索研究准晶智能复合材料/结构的新方法，是固体力学与凝聚态物理的交叉研究领域，主要致力于：发展和完善求解准晶缺陷问题的方便、有效的工具，提供求解结构复杂的准晶复合材料的有效方法和理论模型；揭示新的耦合现象和物理规律；探索复杂受力条件下损伤演化特征，预报和分析复合材料的物理和力学性能，揭示其变形、损伤、破坏的本质。为材料的设计、改性及破坏与灾难的防止提供有效的方法与依据，进而优化设计准晶元器件。

中文关键词： 准晶；智能复合材料；层状结构；界面裂纹；类Stroh理论

英文摘要： Quasicrystals emerged as a new structure of solid matter around 1984. They are predominantly used in industry as coatings or thin films of metals. This project deals with laminated intelligent composites of quasicrystals. The pseudo-Stroh formalism and propagator matrix method of multilayered structures are extended in order to construct the mechanical model of multilayered intelligent composites of quasicrystals. This work probably relies on theoretical analysis while numerical simulation and experimental testing subsidiary, develops the framework of the interface model of structure damage evolution, and explores the basic mechanism of damage and failure and the reason of performance deterioration in laminated intelligent composites of quasicrystals. The research project is a new research field in solid mechanics and condensed matter physics, and is designed to search new methods for laminated intelligent composites of quasicrystals. We focus on very effective and convenient tools, which help us to obtain analytic solutions for interface defect problems of quasicrystals. We manage to present an effective way to deal with the complicated mechanical problems of quasicrystalline composites, and construct the basic criteria of fracture of laminated intelligent composites of quasicrystals. The project aims to explore the damage evolution in complex loading conditions, forecast and analyze physical/mechanical properties of the composites revealed deformation and damage. The goal of this project is to serve as theoretical foundation for the design and the improvement of optimized laminated intelligent composites, and thus optimize the design of quasicrystalline components.

英文关键词： quasicrystals;intelligent composite materials;laminated structures;interface crack;pseudo-Stroh formalism