德国汉诺威大学庄晓莹教授力智讲坛报告通知(2023-37)

报告题目：Multiscale modelling and topological optimization of flexoelectric metastructures

报告时间：2023年8月12日（周六）14:00（北京时间）

报告地点：河海大学西康路校区闻天馆209

报  告  人：庄晓莹教授，德国汉诺威大学

主办单位：江苏省力学学会信息化工作委员会

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          河海大学人工智能与自动化学院

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报告摘要：

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.

报告人简介：

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-KovalevskajaPrize  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.