Electromechanical response of porous piezoelectric structures and piezoelectric composite structures

智能材料，特别是压电材料和磁电弹性复合材料，由于其机电耦合和磁电耦合，在现代电瓷工业中发挥着重要作用。自1880年Pierre Currie和Jacques Curie发现压电效应以来，大量的研究工作一直集中在理解和开发具有理想压电特性的结构，其应用范围从传感器，致动器和微型加速度计到水听器和能量收集。尽管在通过附加或实质性方法增强一些压电结构的电和机械性质之间的耦合特性方面取得了显著进展，但是致力于理解更先进结构（诸如三维多孔压电结构）的机电响应的研究明显较少，网格增强智能复合材料壳和一般的主动和被动材料与任意取向的压电夹杂物。为此，拟议的研究将集中在机电响应的多孔压电结构，网格加强压电壳体，和异质材料与复杂形状的压电夹杂物。拟议的研究建立在申请人以前的研究工作和智能结构的专业知识。

Smart materials, in particular piezoelectric materials and magnetoelectroelastic composites, by virtue of their electromechanical and magnetoelectric coupling, play a prominent role in modern electroceramic industry. Since the discovery of the piezoelectric effect by Pierre Currie and Jacques Curie in 1880, considerable research effort has been focused on understanding and developing structures with desirable piezoelectric characteristics for applications ranging from sensors, actuators and miniature accelerometers, to hydrophones and energy harvesting. Despite the significant progress made in enhancing the coupling characteristics between the electrical and mechanical properties of some piezoelectric structures by additive or substantive approach, significantly less research has been dedicated to understanding the electromechanical response of more advanced structures such as three-dimensional porous piezoelectric structures, grid-reinforced smart composite shells and general active and passive materials with arbitrarily oriented piezoelectric inclusions. To this end, the proposed research will focus on electromechanical response of porous piezoelectric structures, grid-reinforced piezoelectric shells, and heterogeneous materials with complex shaped piezoelectric inclusions. The proposed research builds on the applicant's previous research work and expertise on smart structures.