复合材料大变形偏心加筋板单元

Large Deformation Stiffened Plate Element for Eccentrically Stiffened Laminated Composite Plates

构造了用于复合材料偏心加筋板结构大变形分析的偏心加筋板单元。在板和肋骨的方程中 ,引用Von-Karman大变形理论计及几何非线性的影响 ,按照Mindlin-Reissoner一阶剪切变形理论考虑横向剪切变形 ;在肋骨的本构造方程中 ,计及常规梁单元忽略了的侧向Poisson效应和扭转刚度。所构造单元的特点是在网格划分时 ,可不必考虑肋骨的位置。

A new stiffened plate element was devised to investigate the geometrically nonlinear behavior of eccentrically stiffened laminated composite plates. For large deformation, the Von-Karman kinematic relations of the plate and stiffener were considered. The transverse shear deformation effect was included by using the Mindlin-Reissoner first-order shearing deformation theory. Y-directional strains and torsional rigidity had been accounted in the stiffener constitutive equations, which were neglected in conventional type modeling. The solution of nonlinear equilibrium equations was obtained by use of Newton-Raphson incremental-iterative procedures. The main feature of this model shows that the mesh divisions can be made not according to the stiffener locations.