Controllable metamaterials and smart structures: Nonlinear problems, modelling and experiments

该项目旨在将当前被动超材料的概念以周期性结构的形式扩展到一类新的智能可控超材料，这将为工程应用开辟新的前景。这些新的周期结构是由弹性和粘弹性材料与具有压电、电致和磁致伸缩特性的可控电活性材料组合而成的。通过将这种定制的电活性元件结合到局部周期性微结构中，并通过为它们的主动控制提供合适的机制，将有可能及时调整这种新MM的动态性能。在控制波过程、内部衰减、频带和能量收集的背景下，研究电活性MM的非线性响应及其作为可控执行器的行为。这种MM的设计需要多尺度和多物理连续介质建模、均匀化、先进的数值方法、优化和实验验证的协同作用。

The project aims to broaden the current concept of passive metamaterials (MM) in the form of periodical structures towards a new class of smart controllable MM, which open new perspectives for engineering applications. These new periodic structures are constituted by elastic and viscoelastic materials combined with controllable electroactive materials with piezoelectric, electro- and magnetostrictive properties. By incorporating such tailored electroactive components into the locally periodic microstructures, and by providing suitable mechanisms for their active control, it will be possible to tune dynamic properties of such new MM in time. Nonlinear response of electroactive MM and their behavior as controllable actuators in the context of controlling wave processes, internal attenuation, frequency bands and energy harvesting will be studied. Designing of such MM requires the synergy of multiscale and multi-physics continuum modelling, homogenization, advanced numerical methods, optimization and experimental validation.