Macro-/micro-structures of elytra, mechanical properties of the biomaterial and the coupling strength between elytra in beetles

Dai, Zhendong; Yang, Zhitao

doi:10.1016/s1672-6529(09)60187-6

Cited by 68 publications

(42 citation statements)

References 18 publications

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“…For instance, nanoindentation has been widely used to characterize the mechanical properties of the constituent phases in metallic alloys [22,23]. Recently, this technique has gained popularity for describing biomaterials and many studies have targeted the cuticle of insects [2,[24][25][26][27][28][29]. Most studies have been performed on the outermost exocuticle, where nanoindentation can be performed in the normal direction.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Microstructure and nanoindentation of the rostrum of Curculio longinasus Chittenden, 1927 (Coleoptera: Curculionidae)

Singh

Jansen

Franz

et al. 2016

Materials Characterization

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The rostrum is an extension of the cuticle of the head of weevils (Coleoptera: Curculionidae) and is often used to bore holes for oviposition (the process of laying eggs) into host plant tissue where larval development occurs. In members of the genus Curculio Linnaeus, 1758, the rostrum is long, slender, and strongly curved, but is nevertheless used to excavate straight bore-holes in the fruit of various host plants, through significant deformation of this structure. In this study, scanning electron microscopy (SEM) was used to examine the rostrum of Curculio longinasus Chittenden, 1927, leading to a microstructural model that describes its deformation behavior.Specifically, we used the continuous stiffness measurement (CSM) technique in nanoindentation to measure the Young's modulus and hardness of rostrum. The values of Young's modulus and hardness for the endocuticle were measured to be 8.91 ± 0.93 GPa and 558 ± 60 MPa, respectively. These results are critical for generating accurate finite element models of the head's mechanical behavior while it undergoes deformation. AbstractThe rostrum is an extension of the cuticle of the head of weevils (Coleoptera: Curculionidae) and is often used to bore holes for oviposition (the process of laying eggs) into host plant tissue where larval development occurs. In members of the genus Curculio Linnaeus, 1758, the rostrum is long, slender, and strongly curved, but is nevertheless used to excavate straight bore-holes in the fruit of various host plants, through significant deformation of this structure. In this study, scanning electron microscopy (SEM) was used to examine the rostrum of Curculio longinasus Chittenden, 1927, leading to a microstructural model that describes its deformation behavior.Specifically, we used the continuous stiffness measurement (CSM) technique in nanoindentation to measure the Young's modulus and hardness of rostrum. The values of Young's modulus and hardness for the endocuticle were measured to be 8.91 ± 0.93 GPa and 558 ± 60 MPa, respectively. These results are critical for generating accurate finite element models of the head's mechanical behavior while it undergoes deformation.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Microstructure and nanoindentation of the rostrum of Curculio longinasus Chittenden, 1927 (Coleoptera: Curculionidae)

Singh

Jansen

Franz

et al. 2016

Materials Characterization

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“…The second contact is the locking mechanism between the left and right elytron that runs along the inside (C3, Figure 4A). These locking mechanisms were studied earlier and they require certain amount of force to decouple the elytra [24]. The third contact is a triangular shaped structure which protrudes from the backside of the head, under which the top inner-side corners of the elytra get tucked in (Figure 4C-D).…”

Section: Microstructure Of the Elytra And The Abdominal Surfacementioning

confidence: 89%

Stag Beetle Elytra: Localized Shape-Retaining, Puncture and Wear-Resistant

Kundanati¹,

Guarino²,

Pugno³

2019

Preprint

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Beetles are by far one of the most successful and diverse insect species. A part of this success is attributed to their elytra which provide various functions such as protection to their bodies from mechanical forces and the harmful environmental factors. In this study, Stag beetle (Lucanus cervus) elytra were first examined for their overall flexural properties and were observed to have a localized shape retaining snap-through mechanism which could play a crucial role in energy absorption, e.g. during battles and falls from heights. The snap-through mechanism was validated using theoretical calculations and also finite element simulations. Elytra were also characterized to examine their puncture and wear resistance. Our results show that elytra resisted puncture up to a force of 1.8±0.4 N and have puncture resistance compared to that of commercially available puncture resistant gloves. The measured values of modulus and hardness of elytra exocuticle were 10.3±0.8 GPa and 0.7±0.1 GPa. Using the hardness to modulus ratio as an indicator of wear resistance, the estimated value was observed to be in the range of wear resistant biological materials. Thus, our study demonstrates different mechanical properties of the stag beetle elytra which can be explored to design shape retaining bio-inspired composites with enhanced puncture and wear resistance.

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“…Exactly based on this, the biomimetic micrometer/nanometer seta array was developed to adapt all circumstance and surface (Wang, Ji, Endlein, Samuel, & Dai, ; Xu, ; Yu et al, ). Many studies find that the elytra of insects have good mechanical material properties such as lighter weight and higher strength, which inspire the design of advanced composites and lightweight structures (Dai & Yang, ; Guo, Song, & Dai, ; Guo, Li, Lu, Zhu, & Dai, ; Smith, Herbert, Wootton, & Evans, ; Yang, Dai, & Guo, ). Mantis shrimp are renowned for breaking shells with brief, powerful and rapid raptorial strikes.…”

Section: Introductionmentioning

confidence: 99%

Morphology and nanoindentation properties of mouthparts in Cyrtotrachelus longimanus (Coleoptera: curculionidae)

Guo

et al. 2017

Microscopy Res & Technique

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Microstructure and nanoindentation properties of the mouthparts for the skillful driller Cyrtotrachelus longimanus are presented. The composition and morphological examinations are made using light, fluorescent, scanning electron microscopy, and Energy Disperse Spectroscopy, respectively. Nanoindentation was carried out to measure the elastic modulus and the hardness of mouthparts. The hardness and modulus for "dry" samples is 0.202 ± 0.065 and 8.604 ± 0.838 GPa, respectively, and the values of "fresh" ones is 0.126 ± 0.0196 and 6.951 ± 0.065 GPa, respectively. These results are critical for analyze the drilling mechanism of the weevil and provide a biological template to inspire the biomimetic design.

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Macro-/micro-structures of elytra, mechanical properties of the biomaterial and the coupling strength between elytra in beetles

Cited by 68 publications

References 18 publications

Microstructure and nanoindentation of the rostrum of Curculio longinasus Chittenden, 1927 (Coleoptera: Curculionidae)

Microstructure and nanoindentation of the rostrum of Curculio longinasus Chittenden, 1927 (Coleoptera: Curculionidae)

Stag Beetle Elytra: Localized Shape-Retaining, Puncture and Wear-Resistant

Morphology and nanoindentation properties of mouthparts in Cyrtotrachelus longimanus (Coleoptera: curculionidae)

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