文献类型：期刊文献

英文题名：Influence of impact velocity on flexoelectric effect

作者：Hu, Taotao[1,2];Wang, Xuezhi[3];Yan, Yabin[4];Chen, Lijun[1];Xu, Wei[1]

机构：[1]Changan Univ, Sch Highway, Xian 710064, Shaanxi, Peoples R China;[2]Xi An Jiao Tong Univ, Sch Aerosp Engn, State Key Lab Strength & Vibrat Mech Struct, Xian 710049, Shaanxi, Peoples R China;[3]Changan Univ, Dept Appl Phys, Xian 710064, Shaanxi, Peoples R China;[4]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China

年份：2019

卷号：15

外文期刊名：RESULTS IN PHYSICS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000502391000282)】；

基金：This research was supported by the Natural Science Basic Research Program of Shaanxi (Program No. 2019JQ-675), the Project funded by China Postdoctoral Science Foundation (Program No. 2019M653518), the Open Fund of State Key Laboratory for Strength and Vibration of Mechanical Structures (No. SV2019-KF-13), Xi'an Jiaotong University.

语种：英文

外文关键词：Flexoelectricity; Impact speed; Voltage

摘要：Flexoelectric effect is the coupling of the inhomogeneous deformation and electric polarization, which exists widely in dielectrics. At present, although some scholars have carried out the experimental research on the measurement of the flexoelectric coefficient under impact loading, there is still no research on the variation law of flexoelectric effect under different impact velocities. In this letter, the voltage variations of barium titanate (BT) samples at different impact velocities are studied. The result shows that when the impact velocity is above 230 m/s, the increasing amplitude of the maximum voltage generated by the flexoelectric effect becomes larger, and when the impact velocity is below 200 m/s, the maximum voltage change is gentle. Finally, the longitudinal flexoelectric coefficient of BT is calculated as 33.57 x 10(-6) C/m, which is consistent with the published measured value. This can provide theoretical guidance for the preparation of dynamic sensors based on flexoelectric effect in the future.