FML (Fiber metal laminate) is widely used in aerospace as an advanced composite material. Metal hybrid bistable composites are one type of FML structure. The hybrid bistable composite is not only deformable but also conductive. In this paper, based on a bistable metamaterial tube, it is proposed to control its shape through metal-composite layups. A theoretical prediction model with a metal slip effect is developed. The energy equation of the theoretical model was solved using the principle of minimum potential energy. The curvature variation rules of two configurations of composite tube with different metal layups and different initial curvatures are discussed. Moreover, the finite element model of the metal hybrid composite is established. Finally, the accuracy of the theoretical and finite element models was verified by experiments. The proposed metal slip model is accurate than the classical model. The effect of metal on the bistable tube was determined. The configuration of the bistable tube is controlled by layups without adding any weight. This plays an important role in deformable metamaterials and multi-functional morphing structure applications.

中文翻译：

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金属复合材料可重构管的机械调整与预测


FML（纤维金属层压板）作为一种先进的复合材料广泛用于航空航天。金属杂化双稳态复合材料是 FML 结构的一种类型。这种混合双稳态复合材料不仅可变形，而且具有导电性。在本文中，基于双稳态超材料管，提出了通过金属复合材料铺层来控制其形状。建立了一种具有金属滑移效应的理论预测模型。理论模型的能量方程采用最小势能原理求解。讨论了不同金属铺层和不同初始曲率的两种复合管配置的曲率变化规律。此外，建立了金属混合复合材料的有限元模型。最后，通过实验验证了理论模型和有限元模型的准确性。所提出的金属滑移模型比经典模型准确。测定金属对双稳态管的影响。双稳态管的配置由叠层控制，无需增加任何重量。这在可变形超材料和多功能变形结构应用中发挥着重要作用。