Journal
MICRON
Volume 110, Issue -, Pages 67-72Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.micron.2018.05.003
Keywords
Dragonfly wing; Vein; Tensile properties; Crack arrest; In situ tensile test
Categories
Funding
- National Natural Science Foundation of China [51375006, 51405186, 51505181, 51675223]
- Postdoctoral Science Foundation of China [801161050414, 2016M590256]
- Advanced Manufacturing Project of Provincial School Construction of Jilin Province [SXGJSF2017-2]
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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.
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