Formulation and evaluation of an analytical model for composite box-beams
Formulation and evaluation of an analytical model for composite box-beams
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DOI：
10.4050/jahs.36.23
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发表时间：
1991-07
影响因子：
1.5
通讯作者：
E. Smith;I. Chopra
中科院分区：
文献类型：
--
作者：
E. Smith;I. Chopra
本文提出了一种确定复合箱梁结构有效弹性刚度和变形特性的直接方法，并对其进行了分析、验证和论证。BB壁被建模为正交异性层合板，因此弹性性能随BB壁厚和BB轮廓而变化；变形是根据拉伸、弯曲、扭转、剪切和与扭转有关的面外翘曲来描述的。几种BB配置的数值结果以表格和图表的形式呈现，并与实验数据和FEM计算进行了比较（Stemple和Lee， 1989）：除了铺层方向角θ大于30°的对称铺层外，交叉铺层、反对称铺层和对称铺层都得到了良好的总体一致性。发现面外挠曲和横向剪切耦合对BB弹性响应都有显著影响。
A direct method for determining the effective elastic stiffnesses and deformation behavior of composite box-beam (BB) structures is developed analytically, validated, and demonstrated. The BB walls are modeled as orthotropic-ply laminated plates, so that the elastic properties vary both through the thickness and around the BB contour; deformation is described in terms of extension, bending, twisting, shearing, and torsion-related out-of-plane warping. Numerical results for several BB configurations are presented in tables and graphs and compared with experimental data and FEM computations (Stemple and Lee, 1989): good general agreement is obtained for cross-ply, antisymmetric, and symmetric layups, except for symmetric layups with ply orientation angles theta greater than 30 deg. Both out-of-plane warping and transverse shear coupling are found to have significant effects on BB elastic response.