Hierarchical Dragonfly Wing: Microstructure-Biomechanical Behavior Relations

Chen, Yinglong; Wang, Xi-Shu; Ren, Huaihui; Yin, Hang; Jia, Su Qiu

doi:10.1016/s1672-6529(11)60114-5

Cited by 30 publications

(24 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the data of Mises stress distribution and the flexural deformation analysis using the finite element analysis, Chen et al. () further concluded that the maximum bending stress of such a hollow ‘hard shell–soft core’ or sandwich‐design model of the diameter of wing veins is mainly maintained by the outer stiffer layer. This is in accordance with the study of Giannakopoulos & Suresh (), who, by developing a general theory for frictionless normal indentation of elastically graded materials by point loads, could predict that in the case of a decreasing elastic modulus the peak value of local tensile stresses is moved closer to the surface.…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, circumferentially aligned chitin fibres in the compliant, soft layer were suggested to contribute to the absorption of the torsional deformation (Chen et al. ) and may, thus, serve as inner support, improving the tensile strength.…”

Section: Discussionmentioning

confidence: 99%

“…Further, according to Wang et al (2008), the torsional deformation of a sandwich-like structured wing vein was found to mainly occur at the inner layer under axial torque. Additionally, circumferentially aligned chitin fibres in the compliant, soft layer were suggested to contribute to the absorption of the torsional deformation (Chen et al 2012) and may, thus, serve as inner support, improving the tensile strength.…”

Section: Possible Functions Of Resilin-bearing Sandwich-like Structurmentioning

confidence: 99%

See 2 more Smart Citations

Ultrastructure of dragonfly wing veins: composite structure of fibrous material supplemented by resilin

et al. 2015

View full text Add to dashboard Cite

Dragonflies count among the most skilful of the flying insects. Their exceptional aerodynamic performance has been the subject of various studies. Morphological and kinematic investigations have showed that dragonfly wings, though being rather stiff, are able to undergo passive deformation during flight, thereby improving the aerodynamic performance. Resilin, a rubber-like protein, has been suggested to be a key component in insect wing flexibility and deformation in response to aerodynamic loads, and has been reported in various arthropod locomotor systems. It has already been found in wing vein joints, connecting longitudinal veins to cross veins, and was shown to endow the dragonfly wing with chordwise flexibility, thereby most likely influencing the dragonfly's flight performance. The present study revealed that resilin is not only present in wing vein joints, but also in the internal cuticle layers of veins in wings of Sympetrum vulgatum (SV) and Matrona basilaris basilaris (MBB). Combined with other structural features of wing veins, such as number and thickness of cuticle layers, material composition, and cross-sectional shape, resilin most probably has an effect on the vein's material properties and the degree of elastic deformations. In order to elucidate the wing vein ultrastructure and the exact localisation of resilin in the internal layers of the vein cuticle, the approaches of bright-field light microscopy, wide-field fluorescence microscopy, confocal laser-scanning microscopy, scanning electron microscopy and transmission electron microscopy were combined. Wing veins were shown to consist of up to six different cuticle layers and a single row of underlying epidermal cells. In wing veins of MBB, the latter are densely packed with light-scattering spheres, previously shown to produce structural colours in the form of quasiordered arrays. Longitudinal and cross veins differ significantly in relative thickness of exo- and endocuticle, with cross veins showing a much thicker exocuticle. The presence of resilin in the unsclerotised endocuticle suggests its contribution to an increased energy storage and material flexibility, thus to the prevention of vein damage. This is especially important in the highly stressed longitudinal veins, which have much lower possibility to yield to applied loads with the aid of vein joints, as the cross veins do. These results may be relevant not only for biologists, but may also contribute to optimise the design of micro-air vehicles.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Possible Functions Of Resilin-bearing Sandwich-like Structurmentioning

confidence: 99%

See 1 more Smart Citation

Ultrastructure of dragonfly wing veins: composite structure of fibrous material supplemented by resilin

et al. 2015

View full text Add to dashboard Cite

show abstract

“…These naturally occurring or man-made systems benefit from significantly enhanced mechanical properties 1 2 such as lightweight high-strength characteristics and an increased resistance to crack propagation 2 . These qualities are needed by biological structures like bones 3 , wood 4 and insect wings 5 . Hierarchical systems are also utilised in industry and engineering as catalysts 6 , reinforced structures 7 and sandwich panels 8 .…”

mentioning

confidence: 99%

Hierarchical Auxetic Mechanical Metamaterials

Gatt

Mizzi

Azzopardi

et al. 2015

Sci Rep

260

218

View full text Add to dashboard Cite

Auxetic mechanical metamaterials are engineered systems that exhibit the unusual macroscopic property of a negative Poisson's ratio due to sub-unit structure rather than chemical composition. Although their unique behaviour makes them superior to conventional materials in many practical applications, they are limited in availability. Here, we propose a new class of hierarchical auxetics based on the rotating rigid units mechanism. These systems retain the enhanced properties from having a negative Poisson's ratio with the added benefits of being a hierarchical system. Using simulations on typical hierarchical multi-level rotating squares, we show that, through design, one can control the extent of auxeticity, degree of aperture and size of the different pores in the system. This makes the system more versatile than similar non-hierarchical ones, making them promising candidates for industrial and biomedical applications, such as stents and skin grafts.

show abstract

“…Alternatively, tremendous progress was done in the field of aerodynamics and Kinematics [7][8][9][10][11][12][13][14][15][16]. Vincent [17] found that the material of insect wing was similar to composite materials, many other researchers also believed that the wing of natural insects are composite structures [18][19][20]. Composite materials are currently used for UAVs [21,22].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Influence of Fibre Orientations in a two-layered Biomimetic Flapping Wing

Rayhan

Jian

2017

MATEC Web Conf.

View full text Add to dashboard Cite

Abstract.A numerical study was carried out to investigate the effects of fibre orientation angles in an adopted biomimetic flapping wing having two-layered Carbon/Epoxy Composite T300/5208. The purpose of this paper is to understand how different orientation angles with different combinations affect the stresses of a flapping-wing. One flapping cycle was divided into twelve segments and both maximum stress and deformation were calculated for all the segments. The results revealed that, the maximum stress was produced in [0/-45] combination, where the least was found for [45/0]. For all the simulated wings, deformation was found less than 1.8 mm. ANSYS DesignModeler and Static Structural was used to design and perform structural analysis. The findings are helpful in answering why insect wings are so impeccable, thus providing a possibility of improving the design of flapping-wing aerial vehicles.

show abstract

Hierarchical Dragonfly Wing: Microstructure-Biomechanical Behavior Relations

Cited by 30 publications

References 15 publications

Ultrastructure of dragonfly wing veins: composite structure of fibrous material supplemented by resilin

Ultrastructure of dragonfly wing veins: composite structure of fibrous material supplemented by resilin

Hierarchical Auxetic Mechanical Metamaterials

Numerical Analysis of the Influence of Fibre Orientations in a two-layered Biomimetic Flapping Wing

Contact Info

Product

Resources

About