应水利与交通学院邀请，莱布尼茨-汉诺威大学Xiaoying Zhuang教授，为广大师生做专题学术报告。欢迎广大师生积极参加！

专家简介：Prof. Dr. Xiaoying Zhuang, Chair of Computational Science and Simulation Technology, Heisenberg-Professor, Leibniz University Hannover, Tongji University, Dr. Xiaoying Zhuang’s key research area is computational materials design for nano composites, metamaterials and nanostructures as well as computational methods for multiphysics and multiscale modelling. She was awarded with the Sofja-Kovalevskaja Prize  from Alexander von Humboldt Foundation focusing on the modelling and optimization of polymeric nanocomposite. She is the recipient of Heinz-Maier-Leibnitz Prize for young scientists and was granted with Heisenberg-Professor. Her ongoing ERC Grant is devoted to the optimization and multiscale modelling of piezoelectric and flexoelectric nano structures.

Abstract: Flexoelectricity is the generation of electric polarization under mechanical strain gradient or mechanical deformation subjected to an electric gradient (converse-flexo). Flexoelectricity is a more general phenomenon than the linear change in polarization due to stress, the piezoelectric effect. In contrast to piezoelectricity, flexoelectricity exists in wider range of centrosymmetric materials especially nontoxic material useful for biomedical application. Flexoelectricity grows dominantly in energy density when scale reduces to submicro or nano, meaning the promise of enabling self-powered nano device such as body implant and small-scale wireless sensor. In this talk, I will present the multiscale characterization of flexoelectric materials and design of flexoelectric including nonlinear topological optimization for single/multi-phase materials, machine learning based nanoscale characterization of 2D flexoelectric materials, and atomistic to continuum dynamic flexoelectric modelling. Phononic metamaterials for enhancing the flexoelectricity is being utilized and integrated in the design to outperform the current design of nano energy harvesters. Interesting phenomenon of utilizing topological insulators and metaplates of phononic structures will be shown that can enhance the performance of nano energy harvester.