College of Mechanical and Electrical Engineering, Suqian University, Suqian, People's Republic of China.
Microsc Res Tech. 2024 Sep;87(9):2013-2026. doi: 10.1002/jemt.24576. Epub 2024 Apr 16.
The folding/unfolding mechanism and collision recovery effect of the beetle's hind wings can provide biomimetic inspiration for the optimization of wing deplorability and the investigation of collision prevention recovery mechanism of new amphibious morphing vehicle. In this study, a method is described to investigate the structural response and mechanical properties of the hind wings of the beetle Protetia brevitarsis under natural conditions. The specially processed test samples were conducted to tensile testing, which facilitates the evaluation of the mechanical properties of specific areas of the hind wing. The micro geometric morphological characteristics of the cross-section of the specimen after tensile fracture were observed by scanning electron microscopy. The three-dimensional morphology of the ventral and dorsal sides of the hind wing was characterized using three-dimensional scanning and reverse modeling methods. The finite element model of the hind wing is developed to investigate the structural deformation and modal response characteristics of its flapping. The uniformly distributed load on the hind wing surface is derived from the lift characteristics obtained from the computational fluid dynamics simulation of flapping wing motion. RESEARCH HIGHLIGHTS: Scanning electron microscope is used to observe the cross-sectional characteristics of the veins and membranes. The material properties of the wing membranes and veins of the hind wings were measured using the tensile testing system. The three-dimensional morphology of the hind wing was characterized using 3D scanning and reverse modeling methods. The finite element model of the hind wing is developed to investigate the structural deformation and modal response characteristics of its flapping.
甲虫后翅的折叠/展开机构和碰撞恢复效果可为优化机翼可折叠性以及研究新型水陆两栖变形飞行器的碰撞预防恢复机制提供仿生启示。在这项研究中，描述了一种方法来研究甲虫 Protetia brevitarsis 后翅在自然条件下的结构响应和力学性能。对经过特殊处理的测试样品进行了拉伸测试，这有助于评估后翅特定区域的力学性能。通过扫描电子显微镜观察了拉伸断裂后试样横截面的微观几何形态特征。使用三维扫描和逆向建模方法对后翅的腹侧和背侧的三维形态进行了表征。建立了后翅的有限元模型，以研究其扑动的结构变形和模态响应特性。从扑动翼运动的计算流体动力学模拟中获得的升力特性推导出后翅表面的均匀分布载荷。研究亮点：扫描电子显微镜用于观察脉和膜的横截面特征。使用拉伸测试系统测量了后翅膜和脉的材料特性。使用三维扫描和逆向建模方法对后翅的三维形态进行了表征。建立了后翅的有限元模型，以研究其扑动的结构变形和模态响应特性。
