标题：The Flexoelectric Effect of Nanobeam Based on a Reformulated Strain Gradient Elasticity
作者：Yang, Xu ;Zhou, Ya-Rong ;Yao, Kun-Yu ;Wang, Bing-Lei
作者机构：[Yang, Xu ;Zhou, Ya-Rong ;Yao, Kun-Yu ;Wang, Bing-Lei ] Department of Engineering Mechanics, Shandong University, Jinan; 250061, China
会议名称：13th Symposium on Piezoelectrcity, Acoustic Waves, and Device Applications, SPAWDA 2019
会议日期：11 January 2019 through 14 January 2019
来源：Proceedings of the 2019 13th Symposium on Piezoelectrcity, Acoustic Waves, and Device Applications, SPAWDA 2019
关键词：Energy harvesting; Flexoelectricity; Piezoelectricity; Strain gradient elasticity
摘要：To accurately predict the flexoelectric response of nanobeam-based energy harvesting, a reformulated strain gradient elasticity theory is employed to derive an electromechanical model of nanobeam. Three independent material length scale parameters are incorporated to capture the size effect. The governing equation and boundary conditions are derived by applying the Hamilton principle for the simply supported beam. The closed-form analytical solutions to the bending response with mechanical and electric loads applied are obtained. The results show that the strain gradient elasticity can decrease the transverse displacement of the simply supported beam and significantly reduce the energy efficiency. Therefore, the strain gradient elasticity shouldn't be ignored when studying the flexoelectric responses of nanoscale structures. © 2019 IEEE.