Dragonfly-wing-inspired polymer design for property enhancement

Matter ◽  
2021 ◽  
Vol 4 (8) ◽  
pp. 2674-2676
Author(s):  
Meng Chen ◽  
Da-Hui Qu ◽  
He Tian
Keyword(s):  
Dragonfly Wing

scholarly journals An organic junction between the vein and membrane of the dragonfly wing

2011 ◽  
Vol 56 (16) ◽  
pp. 1658-1660 ◽  
Author(s):  
YingLong Chen ◽  
XiShu Wang ◽  
HuaiHui Ren ◽  
XuDong Li
Keyword(s):  
Dragonfly Wing

scholarly journals Fluid–structure interaction simulation on flight performance of a dragonfly wing under different pterostigma weights

2021 ◽  
Vol 37 ◽  
pp. 216-229
Author(s):  
Yung Jeh Chu ◽  
Poo Balan Ganesan ◽  
Mohamad Azlin Ali
Keyword(s):  
Optimization Design ◽  
Fluid Structure Interaction ◽  
Spatial Location ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Dragonfly Wing ◽  
Interaction Simulation ◽  
Wing Performance ◽  
Drag Ratio ◽  
Lift To Drag Ratio

Abstract The dragonfly wings provide insights for designing an efficient biomimetic micro air vehicle (BMAV). In this regard, this study focuses on investigating the effect of the pterostigma weight loading and its spatial location on the forewings of dragonfly by using the fluid–structure interaction simulation. This study also investigates the effect of change in the wing elasticity and density on the wing performance. The forewing, which mimics the real dragonfly wing, is flat with a 47.5 mm span and a 0.4 mm thickness. The wing was set to cruise at 3 m/s with a constant flapping motion at a frequency of 25 Hz. This study shows that a small increase of pterostigma loading (11% of wing weight) at the tip of the wing significantly improves the lift to drag ratio, CL/CD, which has 129.16% increment in comparison with no loading. The lift to drag ratio depends on the pterostigma location, pterostigma loading, elastic modulus and density. The results of this study can be used as a reference in future BMAV wing optimization design.

Dragonfly wing-inspired architecture makes a stiff yet tough healable material

Matter ◽  
2021 ◽  
Author(s):  
JianHua Xu ◽  
Tong Liu ◽  
Yongzheng Zhang ◽  
YaNa Zhang ◽  
Kai Wu ◽  
...  
Keyword(s):  
Dragonfly Wing

scholarly journals Investigation of High Lift Force Generation of Dragonfly Wing by a Novel Advanced Mode in Hover

Fluids ◽  
2020 ◽  
Vol 5 (2) ◽  
pp. 59
Author(s):  
Xiaohui Su ◽  
Kaixuan Zhang ◽  
Juan Zheng ◽  
Yong Zhao ◽  
Ruiqi Han ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Energy Expenditure ◽  
Lift Force ◽  
Lift Coefficient ◽  
Aerodynamic Performance ◽  
Dynamic Stall ◽  
Force Generation ◽  
High Lift ◽  
Dragonfly Wing ◽  
Symmetrical Mode

In the paper, a novel flapping mode is presented that can generate high lift force by a dragonfly wing in hover. The new mode, named partial advanced mode (PAM), starts pitching earlier than symmetric rotation during the downstroke cycle of the hovering motion. As a result, high lift force can be generated due to rapid pitching coupling with high flapping velocity in the stroke plane. Aerodynamic performance of the new mode is investigated thoroughly using numerical simulation. The results obtained show that the period-averaged lift coefficient, CL, increases up to 16% compared with that of the traditional symmetrical mode when an earlier pitching time is set to 8% of the flapping period. The reason for the high lift force generation mechanism is explained in detail using not only force investigation, but also by analyzing vortices produced around the wing. The proposed PAM is believed to lengthen the dynamic stall mechanism and enhance the LEV generated during the downstroke. The improvement of lift force could be considered as a result of a combination of the dynamic stall mechanism and rapid pitch mechanism. Finally, the energy expenditure of the new mode is also analyzed.

A review of aerodynamic studies on dragonfly flight

2019 ◽  
Vol 233 (18) ◽  
pp. 6519-6537 ◽  
Author(s):  
Erfan Salami ◽  
Thomas A Ward ◽  
Elham Montazer ◽  
Nik Nazri Nik Ghazali
Keyword(s):  
Web Of Science ◽  
Micro Air Vehicles ◽  
Flight Performance ◽  
Aerodynamic Design ◽  
Journal Articles ◽  
Dragonfly Wing ◽  
Thomson Reuters ◽  
Gliding Flight ◽  
And Control ◽  
Air Vehicles

In the recent decades, the design and development of biomimetic micro air vehicles have gained increased interest by the global scientific and engineering communities. This has given greater motivation to study and understand the aerodynamics involved with winged insects. Dragonflies demonstrate unique and superior flight performance than most of the other insect species and birds. They are capable of sustained gliding flight as well as hovering and able to change direction very rapidly. Pairs of independently controlled forewings and hindwings give them an agile flying ability. This article presents a review of all published journal articles, listed in the Thomson-Reuters Web-of-Science database (1985–2018), that are related to the flight aerodynamics of dragonflies or micro air vehicles that biomimic them. The effects of dragonfly wing motions and interactions (between forewing and hindwing) that are necessary to generate the appropriate aerodynamic forces in different flight modes are described. The associated power requirements of these modes are also addressed. This article aims to provide a valuable reference to the aerodynamic design and control of dragonfly-inspired biomimetic micro air vehicles.

J0260102 The effect of micro spikes on dragonfly wing at flow around the wing

2015 ◽  
Vol 2015 (0) ◽  
pp. _J0260102--_J0260102-
Author(s):  
Naoyuki TANAKA ◽  
Hisayoshi NAKA ◽  
Hiromu HASHIMOTO
Keyword(s):  
Dragonfly Wing

BIOMIMETIC STRUCTURE DESIGN OF DRAGONFLY WING VENATION USING TOPOLOGY OPTIMIZATION METHOD

2014 ◽  
Vol 14 (04) ◽  
pp. 1450078 ◽  
Author(s):  
JIYU SUN ◽  
MINGZE LING ◽  
CHUNXIANG PAN ◽  
DONGHUI CHEN ◽  
JIN TONG ◽  
...  
Keyword(s):  
Topology Optimization ◽  
Optimization Method ◽  
Structure Design ◽  
Staggered Grid ◽  
Wing Venation ◽  
Quantitative Models ◽  
Dragonfly Wing ◽  
Wing Motion ◽  
Dragonfly Wings ◽  
Topology Optimization Method

Scientists have carried out research for various biomimetic applications based on the dragonfly wings because of the superb flying skills and lightsome posture. The wings of dragonflies are mainly composed of veins and membranes, which give rise to the special characteristics of their wings that make dragonflies being supremely versatile, maneuverable fliers. Mimicking the dragonfly wing motion is of great technological interest from application's point of view. However, the major challenge is the biomimetic fabrication to replicate the wing motion due to the very complex nature of the wing venation of dragonfly wings. In this regard, the topology optimization method (TOM) is useful to simplify object's structure while retaining its mechanical properties. In this paper, TOM is employed to simplify and optimize the venation structure of dragonfly (Pantala flavescens Fabricius) wing that is captured by a 3D scanner and numerical reconfiguration. Combined with the material parameters obtained from nanoindentation testing, the quantitative models are established based on a finite element (FE) analysis and discussed in static range. The quantitative models are then compared with the square frame, staggered grid frame and hexagonal frame to examine the potentials of the biomimetic structure design for the fabrication of greenhouse roof.

Biomechanical behaviors of dragonfly wing: relationship between configuration and deformation

2012 ◽  
Vol 21 (3) ◽  
pp. 034501 ◽  
Author(s):  
Huai-Hui Ren ◽  
Xi-Shu Wang ◽  
Ying-Long Chen ◽  
Xu-Dong Li
Keyword(s):  
Dragonfly Wing
Sign in / Sign up

Export Citation Format

Share Document