Twisting cracks in Bouligand structures

Suksangpanya, Nobphadon; Yaraghi, Nicholas A.; Kisailus, David; Zavattieri, Pablo

doi:10.1016/j.jmbbm.2017.06.010

Cited by 206 publications

(152 citation statements)

References 66 publications

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“…Specifically, crack twisting produces mixed‐mode stress states at the crack front even under initially pure mode I loading condition. The effective mode I stress intensity at the crack tip and crack driving force represented by the strain energy release rate with crack extension can also be decreased, as shown in Figure c. Additionally, the Bouligand structure is capable of dissipating mechanical energy by filtering the shear stress waves in the case of dynamic loading, thereby endowing materials with enhanced impact resistance.…”

Section: Toughening By Complexity Of Structural Orientationsmentioning

confidence: 98%

“…These characteristics are the basis for most of the anisotropic designs in biological materials in developing their functionalities. For example, the easy propagation of cracks along interfaces is critical for rendering the toughening effect through the complexity of structural orientations . Additionally, the good deformability of interfacial matrices plays a key role in allowing for the in situ reorientation of constituents during deformation, thereby offering an effective approach toward simultaneous improvement in different mechanical properties…”

Section: Mechanical Role Of Interfaces In Biological Materialsmentioning

confidence: 99%

“…The differing orientations of aragonite platelets in adjacent lamellae are indicated by the white arrows. b) The Bouligand structure in the dactyl club of the mantis shrimp and illustrations of the crack twisting through the structure . The twisted angle Φ is defined as the inclination of twisted straight crack front relative to its initial flat plane.…”

Section: Toughening By Complexity Of Structural Orientationsmentioning

confidence: 99%

“…Such a structure is particularly effective in resisting damage or impact along the orthogonal direction of layers. In the more brittle Bouligand structures, as seen in the exoskeletons of crustaceans, cracks are directed to twist continuously along the out‐of‐plane contours as they grow, as shown in Figure b. This acts to increase the surface area for cracking and promote the nucleation of multiple microcracks without significant coalescence between them.…”

Section: Toughening By Complexity Of Structural Orientationsmentioning

confidence: 99%

See 3 more Smart Citations

Structural Orientation and Anisotropy in Biological Materials: Functional Designs and Mechanics

Liu

Zhang

Ritchie

2020

Adv Funct Materials

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Biological materials exhibit anisotropic characteristics because of the anisometric nature of their constituents and their preferred alignment within interfacial matrices. The regulation of structural orientations is the basis for material designs in nature and may offer inspiration for man‐made materials. Here, how structural orientation and anisotropy are designed into biological materials to achieve diverse functionalities is revisited. The orientation dependencies of differing mechanical properties are introduced based on a 2D composite model with wood and bone as examples; as such, anisotropic architectures and their roles in property optimization in biological systems are elucidated. Biological structural orientations are designed to achieve extrinsic toughening via complicated cracking paths, robust and releasable adhesion from anisotropic contact, programmable dynamic response by controlled expansion, enhanced contact damage resistance from varying orientations, and simultaneous optimization of multiple properties by adaptive structural reorientation. The underlying mechanics and material‐design principles that could be reproduced in man‐made systems are highlighted. Finally, the potential and challenges in developing a better understanding to implement such natural designs of structural orientation and anisotropy are discussed in light of current advances. The translation of these biological design principles can promote the creation of new synthetic materials with unprecedented properties and functionalities.

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Section: Toughening By Complexity Of Structural Orientationsmentioning

confidence: 98%

Section: Mechanical Role Of Interfaces In Biological Materialsmentioning

confidence: 99%

Section: Toughening By Complexity Of Structural Orientationsmentioning

confidence: 99%

Section: Toughening By Complexity Of Structural Orientationsmentioning

confidence: 99%

See 2 more Smart Citations

Structural Orientation and Anisotropy in Biological Materials: Functional Designs and Mechanics

Liu

Zhang

Ritchie

2020

Adv Funct Materials

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“…3e. Upon impact, cracks propagate along a helicoidal path through the material, thereby leading to considerable energy dissipation, through multiple mechanisms [16]. A theoretical model was created for crack propagation by Suksangpanya et al [16].…”

Section: Bouligand Structuresmentioning

confidence: 99%

Bioinspired designs for shock absorption, based upon nacre and Bouligand structures

Raphel¹,

Jacob²,

Viswanathan³

2019

SN Appl. Sci.

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Biological materials such as nacre, found in mollusk shells and Bouligand structures, found in the armor of many arthropods, exhibit values of toughness that are much higher than their constituent materials. This is achieved via specific arrangements and combinations of natural materials. In all biomimetic studies seen in literature so far, any one type of material alone is chosen for mimicry. The present work aims to create a set of biomimetic designs that incorporate macroscopic features of both nacre and Bouligand structures, so as to achieve toughness amplification in the given material. Finite element analysis (FEA) of relevant geometric designs are initially performed using ABAQUS software and experimental validation of the most promising model (which was found to show a 46.15% improvement over the reference model) is done. The testing method selected for both simulations as well as experiment is the Charpy impact test (ASTM E23).

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Revealing the Mechanics of Helicoidal Composites through Additive Manufacturing and Beetle Developmental Stage Analysis

Zaheri

Fenner

Russell

et al. 2018

Adv Funct Materials

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Investigation into the microstructure of high performance natural materials has revealed common patterns that are pervasive across animal species. For example, the helicoid motif has gained significant interest in the biomaterials community, where recent studies have highlighted its role in enabling damage tolerance in a diverse set of animals. Moreover, the helicoid motif corresponds to a highly adaptable architecture where the control of the pitch rotation angle between fibrous structures produces large changes in its mechanical response. Nature, takes advantage of this special feature enabling an active response to particular biological needs occurring during an animal's ontogeny. In this work, we demonstrate this adaptive behavior in helicoidal architectures by performing a mechanistic analysis of the changes occurring in the cuticle of the figeater beetle (Cotinis mutabilis) during its life cycle. We complement our investigation of the beetle with the testing of 3D printing samples and a systematic analysis of the effect of pitch angle in the inherent mechanics of helicoidal architectures. Experimentation and analysis reveal improved isotropy and enhanced toughness at lower pitch angles, highlighting the flexibility of the helicoidal architecture. Moreover, trends in stiffness measurements were found to be well‐predicted by laminate theory, suggesting facile mechanics laws for use in biomimicry.

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Twisting cracks in Bouligand structures

Cited by 206 publications

References 66 publications

Structural Orientation and Anisotropy in Biological Materials: Functional Designs and Mechanics

Structural Orientation and Anisotropy in Biological Materials: Functional Designs and Mechanics

Bioinspired designs for shock absorption, based upon nacre and Bouligand structures

Revealing the Mechanics of Helicoidal Composites through Additive Manufacturing and Beetle Developmental Stage Analysis

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