Key Lab of Bionic Engineering, Ministry of Education, Jilin University, Changchun, China.
State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, China.
Microsc Res Tech. 2022 Mar;85(3):861-874. doi: 10.1002/jemt.23955. Epub 2021 Oct 19.
The seagull feather shaft is an important part of the feather, which provides a good mechanical support for the excellent flight performance of seagull, and has the characteristics of lightweight and high strength. In this paper, the microstructure of the seagull feather rachis was observed firstly. Then, based on the structure of feather rachis, combined with the cortex that plays the main load-bearing role, a model with the characteristics of the cortex was proposed and its finite element model was established. Through analyzing the simulation, the effect of section shape of cortex on mechanical properties of feathers under axial impact was revealed. And the conclusion that the section shape with groove structure and non-equal wall thickness could have different effects on mechanical properties was drawn. Then, parameterized cortical models were studied, including different impact velocities and different cortical heights, to reveal the differences in mechanical properties of cortical models.
海鸥羽毛轴是羽毛的重要组成部分，为海鸥卓越的飞行性能提供了良好的机械支撑，具有重量轻、强度高的特点。本文首先观察了海鸥羽毛羽轴的微观结构。然后，基于羽轴的结构，结合主要起承载作用的皮质层，提出了具有皮质层特征的模型，并建立了其有限元模型。通过分析模拟，揭示了皮质层的截面形状对羽毛轴向冲击下力学性能的影响。得出了具有凹槽结构和不等壁厚的截面形状可以对力学性能产生不同影响的结论。然后，研究了参数化的皮质模型，包括不同的冲击速度和不同的皮质层高度，以揭示皮质模型力学性能的差异。
