高应力下悬浮石墨烯薄膜灵敏性的仿真研究  

Simulation Study on Sensitivity of Suspended Graphene Membrane Under High Stress

作　　者：张梦 张晓平 吕根根 刘泉声 ZHANG Meng;ZHANG Xiao⁃ping;LYU Gen⁃gen;LIU Quan⁃sheng(School of Civil Engineering,Wuhan University,Key Laboratory of Safety for Geotechnical and Structural Engineering of Hubei Province,Wuhan 430072,China)

机构地区：[1]武汉大学土木建筑工程学院,岩土与结构工程安全湖北省重点实验室,湖北武汉430072

出　　处：《仪表技术与传感器》2020年第5期18-23,共6页Instrument Technique and Sensor

基　　金：国家重点基础研究发展计划(973)项目(2015CB058102)。

摘　　要：为了利用石墨烯材料对高应力进行测量,优化石墨烯压力传感器的结构设计,采用有限元软件COMSOL对高应力作用下的石墨烯压力薄膜进行模拟分析,在验证软件计算结果可靠性的基础上,研究同面积条件下圆形、矩形和正方形的石墨烯薄膜在均布高应力作用下的受力与变形,得出矩形薄膜对应力最敏感,且薄膜的面积越大,其应力和应变也越大。对矩形薄膜的长宽比对其受力特性的影响分析表明,当矩形薄膜的长宽比大于1.6后,薄膜应力导致的应变变化较小。In order to measure the high stress with graphene material and optimize the structural design of the graphene pres⁃sure sensor,the finite element software COMSOL was used to simulate the graphene pressure membrane under high stress.After verifying the reliability of the simulation results,the stress and deformation of graphene membrane under uniform high stress were studied for circular,rectangular and square shapes with the same areais.The rectangular membrane is most sensitive to stress and the larger the areais,the greater the stress and strain are.The analysis of the aspect ratio of the rectangular membrane shows that,when the aspect ratio of the rectangular membrane is greater than 1.6,the strain change caused by the membrane stress is small.

关 键 词：石墨烯 传感器 高应力 有限元分析 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]