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Optimal design of variable fiber spacing composites for morphing aircraft skins

机译：飞机蒙皮变形的可变纤维间距复合材料的优化设计

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摘要

Morphing aircraft concepts aim to enhance the aircraft performance over multiple missions by designing time variant wing configurations. The morphing concepts require wing skins that are flexible enough to allow large in-plane stretching and high bending stiffness to resist the aerodynamic loads. In this study, an optimization problem is formed to enhance the in-plane flexibility and bending stiffness of wing skins made of composite laminate. Initially, the optimal fiber and elastomer materials for highly flexible fiber reinforced elastomer laminates are studied using materials available in the literature. The minor Pois-son's ratio of the laminate is almost zero for all the fiber and elastomer combinations. In the next stage, the effects of boundary conditions and aspect ratio on the out-of-plane deflection of the laminate are studied. Finally, an optimization is performed to minimize the in-plane stiffness and maximize the bending stiffness by spatially varying the volume fraction of fibers of a laminate. The optimization results show that the in-plane flexibility and bending stiffness of the laminate with a variable fiber distribution is 30-40% higher than for the uniform fiber distribution.
机译：变形飞机概念旨在通过设计时变机翼配置来提高飞机在多个任务中的性能。变形概念要求机翼蒙皮具有足够的柔韧性，以允许较大的平面内拉伸和较高的抗弯刚度，以抵抗气动载荷。在这项研究中，形成了一个优化问题，以增强复合层压板制成的机翼蒙皮的平面内柔韧性和弯曲刚度。最初，使用文献中提供的材料研究了高柔韧性纤维增强弹性体层压板的最佳纤维和弹性体材料。对于所有纤维和弹性体组合，层压材料的次要泊松比几乎为零。在下一阶段，研究边界条件和纵横比对层压板平面外挠度的影响。最后，进行优化以通过在空间上改变层压体的纤维的体积分数来最小化面内刚度并最大化弯曲刚度。优化结果表明，具有可变纤维分布的层压板的面内柔韧性和弯曲刚度比均匀纤维分布高30-40％。

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  • 来源
    《Composite Structures》 |2012年第5期|1626-1633|共8页
  • 作者

    Senthil Murugan; Erick I. Saavedra Flores; Sondipon Adhikari; M.I. Friswell;

  • 作者单位

    School of Engineering, Swansea University, Singleton Park, Swansea SA2 8PP, UK;

    School of Engineering, Swansea University, Singleton Park, Swansea SA2 8PP, UK,Departamento de Ingenieria en Obras Civiles, Universidad de Santiago de Chile, Av. Ecuador 3659, Santiago, Chile;

    School of Engineering, Swansea University, Singleton Park, Swansea SA2 8PP, UK;

    School of Engineering, Swansea University, Singleton Park, Swansea SA2 8PP, UK;

  • 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

    Aircraft skins; Elastomer materials; Variable fiber composites; Optimization;

    机译：飞机蒙皮;弹性体材料;可变纤维复合材料;优化;

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