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Investigation on the mechanical properties of topologically optimized cellular structures for sandwiched morphing skins

机译：晶体性传感皮肤拓扑优化蜂窝结构力学性能研究

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摘要

The mechanical performances of sandwiched morphing skin used for morphing aircraft are principally determined by the cellular substructure undertaking morphing stress. In this paper, in order to guide the design of sandwiched morphing skins utilized in different morphing applications, several optimal topologies of cellular based structures are calculated, and the mechanical properties of them are evaluated.Initially, the topology optimization technique is utilized to minimize stiffness in the direction of deformation. This is followed by establishing 3D models through post-processing. Then the experiments and finite element analyses are performed to evaluate the designs and compare them with conventional regular honeycomb structure as well as zero Poisson's ratio structure. Among them, a novel load transmitting block is designed for transferring shear load using axial movement. The simulated and experimental results show the superiority of optimized topologies. Also, the consistency of them guarantees the reliability of finite element model. Based on it, this research investigates the mechanical performances of periodic cellular structures and the influence depending on the number of cells. The results of the effective transverse modulus, the effective shear modulus, the out-of-plane displacement and the twist angle give support for the development of sandwiched morphing skins in real applications.
机译：用于变形飞机的夹层形状皮肤的机械性能主要由进行传感压力的细胞骨结构决定。在本文中，为了引导在不同变形应用中使用的夹层的变形皮肤的设计，计算了几个蜂窝结构的最佳拓扑结构，并评估了它们的机械性能。最大限度地，利用拓扑优化技术最小化刚度在变形方向上。这是通过后处理建立3D模型。然后进行实验和有限元分析以评估设计，并将它们与传统的常规蜂窝结构进行比较，以及零泊松的比率结构。其中，设计了一种新的负载传输块，用于使用轴向运动传递剪切载量。模拟和实验结果表明优化拓扑的优越性。此外，它们的一致性保证了有限元模型的可靠性。基于它，本研究研究了周期性细胞结构的机械性能和根据细胞数量的影响。有效横向模量，有效剪切模量，外平面外位移和扭转角的结果提供了在实际应用中夹层的变形皮肤的发展。

著录项

  • 来源
    《Composite Structures》 |2020年第10期|112555.1-112555.13|共13页
  • 作者

    Chang Lulu; Shen Xing; Dai Yuke; Wang Taoxi; Zhang Lei;

  • 作者单位

    Nanjing Univ Aeronaut & Astronaut State Key Lab Mech & Control Mech Struct 29 Yudao St Nanjing 210016 Jiangsu Peoples R China;

    Nanjing Univ Aeronaut & Astronaut State Key Lab Mech & Control Mech Struct 29 Yudao St Nanjing 210016 Jiangsu Peoples R China;

    Nanjing Univ Aeronaut & Astronaut State Key Lab Mech & Control Mech Struct 29 Yudao St Nanjing 210016 Jiangsu Peoples R China;

    Nanjing Univ Aeronaut & Astronaut State Key Lab Mech & Control Mech Struct 29 Yudao St Nanjing 210016 Jiangsu Peoples R China;

    Nanjing Univ Aeronaut & Astronaut State Key Lab Mech & Control Mech Struct 29 Yudao St Nanjing 210016 Jiangsu Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sandwiched morphing skin; Topology optimization; 3D printing; Static loading test; Finite element analysis; Mechanical properties;

    机译：夹在变形皮肤;拓扑优化;3D打印;静态加载试验;有限元分析;机械性能;

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