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  • 标题:Bristled-wing design of materials, microstructures, and aerodynamics enables flapping flight in tiny wasps
  • 本地全文:下载
  • 作者:Yonggang Jiang ; Peng Zhao ; Xuefei Cai
  • 期刊名称:iScience
  • 印刷版ISSN:2589-0042
  • 出版年度:2022
  • 卷号:25
  • 期号:1
  • 页码:1-15
  • DOI:10.1016/j.isci.2021.103692
  • 语种:English
  • 出版社:Elsevier
  • 摘要:SummaryParasitoid wasps of the smallest flying insects with bristled wings exhibit sophisticated flight behaviors while challenging biomechanical limitations in miniaturization and low-speed flow regimes. Here, we investigate the morphology, material composition, and mechanical properties of the bristles of the parasitoid waspsAnagrus Haliday. The bristles are extremely stiff and exhibit a high-aspect-ratio conical tubular structure with a large Young's modulus. This leads to a marginal deflection and uniform structural stress distribution in the bristles while they experience high-frequency flapping–induced aerodynamic loading, indicating that the bristles are robust to fatigue. The flapping aerodynamics of the bristled wings reveal that the wing surfaces act as porous flat paddles to reduce the overall inertial load while utilizing a passive shear-based aerodynamic drag-enhancing mechanism to generate the requisite aerodynamic forces. The bristled wing may have evolved as a novel design that achieves multiple functions and provides innovative ideas for developing bioinspired engineering microdevices.Graphical abstractDisplay OmittedHighlights•Bristles are extremely stiff and exhibit a high-aspect-ratio conical tubular structure•Bristles uniformalize structural stress distributions and are robust to loading fatigue•Bristled wings are light, using less power to achieve novel aerodynamic force production•Bristled wings may bring an innovative design for bioinspired engineering microdevicesEntomology; Biomechanics; Materials science; Biomaterials;
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