Study on Bistable Behavior of Antisymmetric Laminated Cylindrical Shells with Different Ply Numbers

Linlin Shen, Xiaodong Pan, Jingbo Zhou, Longcheng Xing, Yu Zhang
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Abstract

The antisymmetrical laminated cylindrical shell is a multilayer composite structure composed of single-layer fiber reinforced composites bonded by fiber-opposing layer, and it is a kind of advanced composite structure with the characteristics of bistable which is not possessed by general shell structure. In this paper, based on the two-point loading method in the experimental study, taking T700/TDE-85 antisymmetrical laminated cylindrical shells as an example, the steady-state transition model of antisymmetrical laminated cylindrical shells is established by using ABAQUS finite element software and the numerical calculation is carried out. The bistable transformation process of antisymmetric laminated cylindrical shells is simulated. The influence of ply number on the bistable behavior of the laminated structure is studied by changing the number of layers of the opposing called laminated cylindrical shells. The results show that the critical load of steady-state transition and the second steady-state residual stress increase with the increase of layer number of laminated shells, but the second steady-state crimp radius is almost unchanged.
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不同层数的反对称层合圆柱壳双稳性研究
非对称层合圆柱壳是由单层纤维增强复合材料经纤维对向层粘合而成的多层复合材料结构,是一种具有一般壳结构所不具备的双稳态特性的高级复合材料结构。本文基于试验研究中的两点加载法,以T700/TDE-85不对称层合圆柱壳为例,利用ABAQUS有限元软件建立了不对称层合圆柱壳的稳态过渡模型,并进行了数值计算。模拟了反对称层合圆柱壳的双稳变换过程。通过改变相对的叠层圆柱壳层数,研究了层数对叠层结构双稳性能的影响。结果表明:随层合壳层数的增加,稳态过渡临界载荷和二阶稳态残余应力增大,但二阶稳态卷曲半径基本不变;
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