Double-walled corrugated structure for bending-stiff anisotropic morphing skins
Double-walled corrugated structure for bending-stiff anisotropic morphing skins
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DOI：
10.1177/1045389x14554132
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发表时间：
2015-03
影响因子：
2.7
通讯作者：
F. Previtali;A. F. Arrieta;P. Ermanni
中科院分区：
文献类型：
--
作者：
F. Previtali;A. F. Arrieta;P. Ermanni
变形有望通过允许在广泛的飞行条件下实现最佳操作来提高翼状结构的性能。然而，一个关键的未解决的问题是实现能够同时承受弯曲和剪切载荷的蒙皮，以及允许显着水平的面内拉伸。在这篇文章中，我们提出了一种新的概念，即采用双壁结构（以下称为双波纹）来表现这些理想的特性。数值结果表明，双波纹能够提供较高的弯曲刚度，同时在低施加力的情况下实现20%的面内拉伸。通过实验验证了数值计算的结果，表明了该概念的可行性。此外，针对不同的材料结构，优化了双波纹的结构特性。同时考虑强度、弯曲刚度、轴向顺应性和重量的非线性优化结果表明，这一概念有可能解决变形蒙皮的冲突要求。
Morphing promises to enhance the performance of wing-like structures by allowing for operating optimally in a wide range of flying conditions. Yet, a key unresolved problem is the realization of a skin capable of concurrently carrying bending and shear loads, as well as allowing for significant levels of in-plane stretching. In this article, a novel concept exhibiting these desirable characteristics is introduced by means of a double walled structure hereafter called double corrugation. Numerical results show that the double corrugation is capable of offering a high bending stiffness while achieving, with low applied forces, a 20% in-plane stretching. The numerically obtained results are validated with experimental tests, showing the feasibility of the concept. Furthermore, the structural characteristics of the double corrugation are optimized for different material constructions. Nonlinear optimization results concurrently considering strength, bending stiffness, axial compliance and weight show the capabilities of this concept to potentially address the conflicting requirements of morphing skins.