Bistable prestressed buckled laminates
Bistable prestressed buckled laminates
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DOI：
10.1016/j.compscitech.2008.09.036
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发表时间：
2008-12-01
影响因子：
9.1
通讯作者：
Weaver, P. M.
中科院分区：
文献类型：
--
作者：
Daynes, S.;Potter, K. D.;Weaver, P. M.
正交铺层[0（n）/90 n]（T）层合板的双稳性已经在实验和理论上得到了详细的研究。由于几何非线性以及组成纤维和基质材料的热膨胀系数之间的不匹配而发生双稳态。在当前的工作中，提出了一种新型的双稳态层合板，其具有对称铺层。它的双稳态性来自于对层合板宽度上残余应力的仔细控制。这是通过在固化前对[0/90/90/0]（T）FRP预浸料层压板中的选定纤维施加预应力来实现的。一旦固化和冷却下来，这种预应力被释放，然后得到的层压板。这种弯曲产生了两个弯曲的几何形状，其中两个边缘保持相对平坦。还进行了分析和有限元建模，以更好地了解这种屈曲机制。这些新的复合材料的潜在应用包括变形飞机蒙皮。(c)2008爱思唯尔有限公司版权所有。
The bistability of cross-ply [0(n)/90n](T) laminates has already been investigated, both experimentally and analytically, in much detail. Bistability occurs due to geometric non-linearity and the mismatch between the thermal expansion coefficients of the constituent fibre and matrix materials. In this current work a new type of bistable laminate is presented which has a symmetric lay-up. Its bistability derives from careful manipulation of the residual stresses across the width of the laminate. This is done by applying a prestress to selected fibres in [0/90/90/0](T) FRP prepreg laminates prior to curing. Once cured and cooled down this prestress is released and the resulting laminate then buckles. This buckling creates two bistable bowing geometries with two edges remaining relatively flat. Analytical and finite element modelling is also carried out to better understand this buckling mechanism. Potential applications of these new bistable composites include morphing aircraft skins. (c) 2008 Elsevier Ltd. All rights reserved.