因为具有多个不同的稳定工作模式，可重构功能器件相比于传统功能器件具备更强的应用潜力，目前已经在无线通信、机器人、生物医学等领域受到了广泛关注。近年来，来自力学、材料学、电子学等不同学科的研究者们针对可重构功能器件提出了一系列设计方法和制备技术，但现有研究工作中的器件在材料选择、尺寸范围、几何形式等方面存在局限性。本文基于屈曲引导的力学自组装方法，通过深入探究结构屈曲组装过程中的变形机制，提出了屈曲引导的可重构三维微结构与可重构功能器件设计制造一体化方法。本文的主要研究内容包括：（1） 阐释了结构发生屈曲变形时具备可重构性质的内在机理。通过控制外部载荷的形式使结构产生不同的初始几何缺陷，不同几何缺陷下结构后续有被诱导形成互为镜像构型的趋势，而基底的接触作用会打破这样的镜像对称性，从而维持稳定的构型差异。一系列有限元模拟和实验结果验证了该机理的普适性。（2） 建立了自下而上设计具有多个稳态的单层可重构三维结构设计策略。发现了一系列由基本几何元素构成的双稳态可重构单胞，例如圆弧形条带、圆弧与相切直线组合条带等，深入分析了不同参数对于单胞可重构性的影响，提出了结构可重构性的定量表征方法。建立了基于可重构单胞实现多稳态复杂可重构结构的设计方法，并且通过对可重构单胞性质的深入分析实现了对于具有目标构型的多稳态复杂可重构结构理性设计。（3） 提出了实现多层可重构三维结构的设计制造一体化方法。通过对于多层结构在屈曲组装应变能变化的深入分析，总结了现有多层结构在组装时发生失效的规律。发现了一系列具备优异性能的层叠单胞设计，深入分析了不同参数对于单胞和整体结构稳定性的影响。基于光刻技术发展了适用于微观多层三维结构的二维前驱体的制备方法。（4） 开展了力学引导的屈曲组装可重构结构在功能器件领域的应用研究。基于多层可重构三维结构的设计方法，设计并制备了一种具备谐振频率-带宽双调控模式的频率选择表面；基于多稳态单层可重构三维结构的设计方法，开展了可重构天线和可重构近场通讯线圈阵列的研究。文中的可重构天线在柔性基底上具有步进式电磁波束扫描的功能，为柔性表面的小型化波束扫描提供了新的解决方案。

Reconfigurable functional devices have more application potential than traditional functional devices because of their switchable working modes, and they have received growing attentions in wireless communication, robotics, biomedicine and other fields. In recent years, researchers from different disciplines, including mechanics, materials science and electronics, have proposed a series of design methods and fabrication techniques for reconfigurable functional devices, but the existing works have limitations in material, size or the device geometry. In this paper, based on the buckling guided 3D self-assembly method, we have proposed a new method for the design and manufacture reconfigurable 3D microstructures and reconfigurable functional devices. The main research contents of this paper include:(1) Explored the physical mechanism of the buckling induced reconfigurable structure. By controlling the form of external load, the substrate can generate different initial geometrical defects in structures, and such geometrical defects will guide the shapes of the 3D structure mirror with each other after the postbuckling deformation. But the existing of substrate will break such mirror symmetry and stabilize the different 3D configurations. A series of finite element simulation and experimental results verify the universality of the mechanism.(2) Proposed a single layer reconfigurable 3D structure design strategy with multiple steady modes. A series of bistable reconfigurable cells composed of basic geometric elements were found, such as circular arc bands, combined bands of arc and tangent lines, etc. The influence of different parameters on the reconfigurable cells was deeply analyzed, and a quantitative evaluation indicator for structural reconfigurable cells was proposed. The design method of multi-stable complex reconfigurable structures based on reconfigurable cell is established, and rational design of multi-stable complex reconfigurable structure with target configuration is realized through the in-depth analysis of the properties of reconfigurable cells.(3) Illustrated an integrated design and manufacture method for multi-layer reconfigurable 3D structures. By analyzing the strain energy variation of multi-layer structures in buckling guided 3D assembly, the failure law of existing multi-layer structures in buckling assembly is revealed. A series of unit cell designs with excellent performance were found and the influence of different parameters on the stability of the unit cell and the whole structure was analyzed deeply. Based on photolithography technique, a fabrication method of 2D precursors for the micro-multilayer 2D structure was developed.(4) Three representative applications of reconfigurable functional devices are provided. Based on the design method of multi-layer reconfigurable 3D structure, we designed and fabricated a frequency selective surface which is capable of controlling both the resonant frequency and the bandwidth. A radiation pattern reconfigurable antenna and a reconfigurable near-field communication coil array were designed and fabricated based on the design method of multi-stable reconfigurable 3D structure. The radiation pattern reconfigurable antenna presents a stepping electromagnetic beam scanning function on a flexible substrate, which provides a new solution for miniaturized beam scanning on flexible surface.