基于Cosserat连续体理论的微纳米螺旋结构轴向负载力做功研究  

Study of the work of micro-/nano-helices under uniaxial load based on the Cosserat continuum theory

作　　者：顾正法 尤嘉 戴璐[1] GU Zhengfa;YOU Jia;DAI Lu(School of Physical Science and Technology,SUST,Suzhou 215009,China)

机构地区：[1]苏州科技大学物理科学与技术学院,江苏苏州215009

出　　处：《苏州科技大学学报（自然科学版）》2022年第3期37-44,共8页Journal of Suzhou University of Science and Technology（Natural Science Edition）

基　　金：国家自然科学基金资助项目(11904249)。

摘　　要：微纳米螺旋结构形状独特,并具有超弹性、压阻压电特性,在微纳米机电系统(MEMS/NEMS)中应用广泛。文章基于Cosserat连续体理论建立了一套模型,定量研究了微纳米螺旋轴向负载力做功的问题。通过对比圆形横截面螺旋、矩形横截面法线螺旋和矩形横截面副法线螺旋这三种结构的负载力及其做功值等物理量,得到研究结果为:拉伸端不可自由旋转的条件下,相同应变时,矩形横截面法线螺旋负载力做功值最大,机械性质最好。Micro-/nano-helices can provide a wide range of application in micro-/nanoelectromechanical systems(MEMS/NEMS)due to their helical shape,superelasticity,piezoresistive and piezoelectric properties.Based on the Cosserat continuum theory,a theoretical model has been established for the exploration of the work of micro-/nano-helices under uniaxial load.By comparing the physical quantities of load force and work for the three kinds of helices of circular cross-section,normal and binormal rectangular cross-sections,we have found that the normal helices with rectangular cross-section show the excellent mechanical properties of the largest work of uniaxial load under the condition that the load end cannot rotate freely.

关 键 词：Cosserat连续体理论 微纳米螺旋 负载力做功 机械性质 

分 类 号：O469[理学—凝聚态物理]