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A zigzag model for laminated composite beams

机译：叠合梁的曲折模型

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摘要

In the present work, a zigzag model for symmetric laminated beam is developed. This model uses a sine terms to represent the non- linear displacement field across the thickness as compared to a third order polynomial term in conventional theories. Transverse shear stress and strain are represented by a cosine term as compared to parabolic term. This model satisfies displacement and transverse shear stress continuity at the interface. zero transverse shear stress boundary condition at the top and bottom of the beam are also satisfied. The numerical results indicates that the present model predicts very accurate results for displacement and stresses for symmetric cross-ply laminated beams, even for small length to thickness ratio. The results are also compared with a simplified theory of same class.
机译：在目前的工作中，开发了一种用于对称层合梁的之字形模型。与传统理论中的三阶多项式项相比，该模型使用正弦项来表示整个厚度范围内的非线性位移场。横向剪切应力和应变用余弦项表示，而抛物线项表示。该模型满足界面处的位移和横向剪应力的连续性。梁的顶部和底部的零横向剪切应力边界条件也得到满足。数值结果表明，即使对于较小的长厚比，本模型也可预测非常精确的对称交叉层合梁的位移和应力结果。还将结果与同类简化理论进行比较。

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