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Development of omega stiffeners using 4D printing of composites

机译:使用4D复合材料的欧米茄加强筋的开发

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4D Printing of Composites (abbreviated as 4DPC) is a manufacturing technique where a composite structure of complex geometry can be made without the need to use a complex mold. Only a flat mold is used. As such there are significant savings in time and money. The technique can also be used to make structures that conventional manufacturing technique cannot. The technique relies on the anisotropic nature of unsymmetric laminates. In this paper, this technique is used to develop omega shape (omega) aircraft wing stiffeners. The lay up sequence allows a flat stack of prepregs to transform into the shape of the omega upon curing and cooling to room temperature. Foam is poured into the cavity of the structure to provide core sandwich support. The stiffener is tested under three-point bending. The flexural stiffness of the stiffener is determined using a model and laminate theory. The calculated stiffness is compared with experimental results. Good agreement is obtained.
机译:4D复合材料的印刷(缩写为4DPC)是一种制造技术,其中可以制造复合几何形状的复合结构而无需使用复杂的模具。 只使用平面模具。 因此,随着时间和金钱,有很大的节省。 该技术还可用于制造常规制造技术不能的结构。 该技术依赖于未对称层压材料的各向异性性质。 在本文中,这种技术用于开发ω形状(Omega)飞机翼加强筋。 叠层序列允许平坦的预浸料坯在固化和冷却到室温时变为ω的形状。 泡沫倒入结构的空腔中,以提供核心夹心支撑。 在三点弯曲下测试加强件。 使用模型和层压理论确定加强件的弯曲刚度。 将计算的刚度与实验结果进行比较。 获得了良好的协议。

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