Zhang Zhihui, Zhang Lan, Yu Zhenglei, Liu Jingjing, Li Xiujuan, Liang Yunhong
Key Lab of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China; State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China.
Key Lab of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China.
Micron. 2018 Jul;110:67-72. doi: 10.1016/j.micron.2018.05.003. Epub 2018 May 5.
In natural biological systems, many insects in complex environments exhibit exemplary mechanical properties. Dragonfly wings are light and strong enough to withstand wind loading. Their rigid veins play supporting and strengthening roles to enhance resistance to fatigue. To explore the effect of veins on arresting cracking in the wing, the costa, subcosta, radius R1, and two areas of dragonfly hind wings were samples for in situ tensile tests. The fracture process of the samples was observed with a high-speed camera and a scanning electron microscope. The mechanical properties of the veins and the results of nanomechanical tests on the wings were analyzed. The costa was stiffer and more resistant to deformation than the subcosta and radius, but it was less tough. The results of this study may provide inspiration for the design of mechanical structures and materials.
在自然生物系统中，许多处于复杂环境中的昆虫都展现出了卓越的力学性能。蜻蜓翅膀轻盈且坚固，足以承受风力载荷。其坚硬的翅脉起到支撑和强化作用，以增强抗疲劳能力。为探究翅脉对翅膀裂纹扩展的抑制作用，选取蜻蜓后翅的前缘脉、亚前缘脉、半径脉R1以及两个区域作为原位拉伸试验的样本。通过高速摄像机和扫描电子显微镜观察样本的断裂过程。分析了翅脉的力学性能以及翅膀的纳米力学测试结果。前缘脉比亚前缘脉和半径脉更硬，更不易变形，但韧性较差。本研究结果可为机械结构和材料的设计提供灵感。
