摘要
本文应用全拉格朗日列式法,对具有纵、横向加筋的叠层圆柱壳进行了非线性有限元稳定性理论公式的推导及求解过程的探讨。文中应用Sander's壳体理论的几何非线性及横向剪切,推导了矩形壳元及与该壳元变形相协调的直梁元与曲梁元的刚度矩阵,编制了FORTRAN计算程序。计算了柱、曲拱、曲壳拱,碳纤维加筋圆柱壳均匀轴压下的前后屈曲。也可用于计算加筋筒壳的弯曲、压-弯及外压等情况。
A nonlinear finite element based on the Total Lagrangian Incremental Formulation of a two-dimensional layered anisotropic medium is developed and its use in buckling as well as postbuckling analysis of stiffened layered composite shells is demonstrated via examples under pure axial compressive loading.A finite element based on Sander's shell theory with transverse shear strains is also presented.The paper gives stiffness matrix of a square shell element,a straight beam and a curved beam element.Finally .several example, problems are given.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1989年第6期B246-B253,共8页
Acta Aeronautica et Astronautica Sinica
关键词
复合材料
壳
有限元法
稳定性
composite, shell, buckling, finite element methods.
