Experimental investigations of the functional morphology of dragonfly wings

查看全文 作　　者：H. [1]Rajabi;A. [1]Darvizeh

机构地区：[1]Department of Mechanical Engineering, Faculty of Engineering, The University of Guilan,Rasht, Iran

出　　处：《Chinese Physics B》索引2013年第22卷第8期,共8页

摘　　要：Nowadays, the importance of identifying the flight mechanisms of the dragonfly, as an inspiration for designing flapping wing vehicles, is well known. An experimental approach to understanding the complexities of insect wings as organs of flight could provide significant outcomes for design purposes. In this paper, a comprehensive investigation is carried out on the morphological and microstructural features of dragonfly wings. Scanning electron microscopy (SEM) and tensile testing are used to experimentally verify the functional roles of different parts of the wings. A number of SEM images of the elements of the wings, such as the nodus, leading edge, trailing edge, and vein sections, which play dominant roles in strengthening the whole structure, are presented. The results from the tensile tests indicate that the nodus might be the critical region of the wing that is subjected to high tensile stresses. Considering the patterns of the longitudinal corrugations of the wings obtained in this paper, it can be supposed that they increase the load-bearing capacity, giving the wings an ability to tolerate dynamic loading conditions. In addition, it is suggested that the longitudinal veins, along with the leading and trailing edges, are structural mechanisms that further improve fatigue resistance by providing higher fracture toughness, preventing crack propagation, and allowing the wings to sustain a significant amount of damage without loss of strength. 关键词：昆虫翅膀功能形态蜻蜓实验扫描电子显微镜 SEM图像汽车设计微观结构

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Experimental investigations of the functional morphology of dragonfly wings

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