Nonlinear Bifurcation and Post-buckling Analysis of Cylindrical Composite Stiffened Laminates Based on Weak Form Quadrature Element Method  

作　　者：Xiang Ou Xiaohu Yao Run Zhang 

机构地区：[1]School of Civil Engineering and Transportation,South China University of Technology,Guangzhou,Guangdong,China

出　　处：《Acta Mechanica Solida Sinica》2023年第6期817-836,共20页固体力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.12202148,12172136);the Natural Science Foundation of Guangdong Province(No.2021A1515010279);the National Science Fund for Distinguished Young Scholar(No.11925203);the Science and Technology Project of Guangzhou(No.202102020656).

摘　　要：This paper presents a weak form quadrature element formulation in the analysis of nonlinear bifurcation and post-buckling of cylindrical composite stiffened laminates subjected to transverse loads.A total Lagrangian updating scheme is used in combination with arc-length method,and the branch-switching method is adopted to identify the whole post-buckling procedure of the laminates.The formulation of the shell model and beam model are based on the basic concept of Ahmad.The coincidence of discrete nodes and integration points in quadrature element endows it with compactness and conciseness in the nonlinear buckling analysis of the cylindrical stiffened laminates.Several numerical examples are firstly presented to verify the effectiveness and accuracy of present formulation.Parametric studies on the effects of the height-to-breadth ratio,lamination schemes,positions,distribution,number of the stiffeners on the bifurcation and post-buckling behavior are performed.

关 键 词：Cylindrical composite stiffened laminates Weak form quadrature element formulation Nonlinear bifurcation bucking Post-buckling analysis 

分 类 号：O17[理学—数学]