Energy absorbed ability and damage analysis for honeycomb sandwich material of bio-inspired micro aerial vehicle under low velocity impact

Abstract

Because of the advantages of light weight, small size, and good maneuverability, the bio-inspired micro aerial vehicle has a wide range of application prospects and development potential in military and civil areas, and has become one of the research hotspots in the future aviation field. The beetle’s elytra possess high strength and provide the protection of the abdomen while being functional to guarantee its flight performance. In this study, the internal microstructure of beetle’s elytra was observed by scanning electron microscope (SEM), and a variety of bionic thin-walled structures were proposed and modelled. The energy absorption characteristics and protective performance of different configurations of thin-walled structures with hollow columns under impact loading was analyzed by finite element method. The parameter study was carried out to show the influence of the velocity of impactor, the impact angle of the impactor and the wall thickness of honeycomb structure. This study provides an important inspiration for the design of the protective structure of the micro aerial vehicle.

A Comparative Study on Impact Resistance of Cylindrical Structures with Cushioning Energy Absorbing Rings under Double Impact Loading

“…V. Acanfora et al evaluated the impact resistance of polymer honeycomb core composite sandwich panels [17]. Du et al analyzed the energy absorption and protection properties of hollow column thin-wall structures with different structural forms under impact loads [18]. Chen et al compared the explosion resistance of honeycomb sandwich plates [19].…”

Numerical investigation on energy absorption characteristics of impact-resistant lightweight structure of bio-mimetic micro aerial vehicle

“…29,30 Du et al considered that the internal structure of beetle's exoskeleton has important reference significance for the design of an impact-resistant structure at the bottom of the MAV, and carried out a series of research work on the imitation beetle's exoskeleton structure by employing the research methods for the civil aircraft fuselage crashworthiness. At present, it is observed that there are many thin-walled honeycomb structures inside the beetle's exoskeleton, so Du's main work is based on the honeycomb multi-cellular structure, including the energy absorption characteristics of adding hollow columns with various geometric shapes on the wall of the structure, 31 the mechanical behavior of adding hollow columns at various honeycomb thinwalled connection positions of the structure, 32 the geometric configuration of hollow columns added to a variety of honeycomb structures and the influence of different sizes, 33 and the influence of adding a different 4,7 , (c) components and parts 4,5 , (d) lightweight thinwalled structures. 22,25,26,27,28 hierarchy of hollow columns to the honeycomb structures.…”

Numerical study on energy absorption characteristics of bio-mimetic multi-cell thin-walled structures with different hierarchy

“…42,43 The results show that the impact resistance of the bionic structure based on beetle has been improved. 44,45 The new bionic structure based on bamboo has also been proved to have good strength and toughness under transverse loading. 46 The experimental and numerical investigation of the ultralight honeycomb materials inspired by the microstructures of bamboo with structural hierarchy under out-of-plane loading are carried out.…”