复合材料变截面压杆稳定性问题研究  

RESEARCH ON THE STABILITY OF COMPOSITE VARIABLE CROSS-SECTION COMPRESSION STRUTS

作　　者：马森 赵启林[2] MA Sen;ZHAO Qilin(Training Base,Officers College of PAP,Guangzhou 510440,China;School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]武警警官学院训练基地,广州510440 [2]南京工业大学机械与动力工程学院,南京211816

出　　处：《工业建筑》2021年第9期202-206,229,共6页Industrial Construction

基　　金：中国载人航天领域预先研究项目(载人四批040101);国家重点研发计划项目(2017YFC0405103)。

摘　　要：以复合材料圆形变截面压杆构件作为研究对象,基于等效参数思想和能量法推导了复合材料圆形变截面压杆稳定理论计算式。首先基于等效参数思想将复合材料压杆壁板等效为主轴方向与压杆轴向一致的正交异性壳,此时复合材料压杆可近似为正交异性压杆;然后针对该正交异性压杆,给出了受压失稳挠曲线方程,基于能量法推导了稳定理论荷载计算式;最后,利用有限元软件对该计算式的准确性进行了验证和讨论。结果表明:在薄壁区域刚度比较小的情况下,该稳定理论计算式能够较准确地预测复合材料变截面压杆的稳定临界荷载。Based on the idea of the equivalent parameters method and energy method,the theoretical formula of composite variable cross-section struts was deduced.Firstly,the wall of the composite compression strut was equivalent to an orthotropic shell whose main axis direction was consistent with the axial direction of the strut based on the idea of the equivalent parameters method,then,the composite strut could be approximated as an orthotropic strut.Thirdly,aiming at the orthotropic compression strut,the buckling deflection equation of compression structs was assumed,and the formula for the theoretical stability load was deduced based on the energy method.Finally,the accuracy of the formula was verified and discussed by comparison with ones by the finite element method,the results showed that:the theory formula in could accurately predict the critical load of the composite variable cross-section compression strut.

关 键 词：复合材料变截面压杆 能量法 稳定理论 稳定临界荷载 

分 类 号：TB33[一般工业技术—材料科学与工程]