Key Laboratory of Bionic Engineering (Ministry of Education, China), Jilin University, Changchun, China.
Faculty of Science and Engineering, University of Groningen, Groningen, The Netherlands.
Microsc Res Tech. 2022 Jul;85(7):2446-2454. doi: 10.1002/jemt.24100. Epub 2022 Mar 11.
Avian flight feathers have the unique advantages of lightweight and high strength, which play a key role in their flight capacity. In this article, the rachis of the bean goose's primary flight feather was used as the research object. Its compressive properties were analyzed and the 3D microscale was observed by 3D microscope system with a super wide depth of field. The distribution of mechanical properties, section variation of fiber and internal microstructure of rachis were obtained by micro-CT technique. Based on these results, a 3D reconstructed model was established for structure mechanical simulation. The simulation results were close basically to the compressive strength of the actual sample. These results show that the synergistic effect of cortex and medulla can improve mechanical resistance of the rachis. Therefore, the best position (N3) of the primary flight feather shaft can be applied to the bionic design of thin wall structures for energy absorption. This research can provide some guidance for the application of lightweight structural design. RESEARCH HIGHLIGHTS: The internal structure of bean goose feather shaft was observed by micro-CT. The experimental method has a deeper understanding of the compressive properties of rachis fiber orientation. Under the synergistic effect of cortex and medulla, the compressive performance of rachis is better.
禽类的飞行羽毛具有重量轻、强度高的独特优势，这对它们的飞行能力起着关键作用。本文以豆雁初级飞羽羽轴为研究对象，利用超景深 3D 显微镜系统对其进行了压缩性能分析和 3D 微观尺度观测，采用微 CT 技术获得了羽轴的力学性能分布、纤维截面变化和内部微观结构。在此基础上建立了 3D 重构模型进行结构力学模拟，模拟结果与实际样品的压缩强度基本吻合。结果表明，皮质层和髓质层的协同作用可以提高羽轴的力学抗性。因此，初级飞羽羽轴的最佳位置（N3）可以应用于薄壁结构的仿生设计，用于能量吸收。本研究可为轻质结构设计的应用提供一些指导。研究亮点：通过微 CT 观察了鹅羽轴的内部结构。实验方法对羽轴纤维取向的压缩性能有了更深入的了解。在皮质层和髓质层的协同作用下，羽轴的压缩性能更好。
