复合材料大变形任意加筋板单元

本文构造了用于复合材料偏心加筋板状结构大变形分析的任意加筋板单元。在此模型中，肋骨可放置在板单元内任意位置和任意方向，因而在网格划分时，可不必顾及肋骨的具体位置。在板和肋骨的基本方程中，引用Von-Karman大变形理论计及大变形的影响，按照 Mindlin-Reissoner一阶剪切变形理论考虑横向剪切变形。任意加筋板单元具有和常规板单元相同的自由度。数值计算表明本文的有限元模型具有很高的精度。

GEOMETRICALLY NONLINEAR PLATE ELEMENT FOR ARBITRARILY STIFFENED LAMINATED COMPOSITE PLATES

A new stiffened plate element is constructed to investigate the geometrically nonlinear behavior of arbitrarily stiffened laminated composite plates. In this model, the stiffener can be placed at anywhere within the plate element and oriented in any direction. The Von-Karman kinematic relations of the plate and stiffener are considered. The transverse shear deformation effect is included by use of Mindlin-Reissner first-order shear deformation theory. This new stiffened plate element has the same degree of freedom as regular plate elements. The results obtained by the proposed method indicate that good agreement with available values can be reached with relatively coarse mesh and less computational time.