Dimensional analysis and parametric studies for designing artificial nacre

Rim, Jee E.; Zavattieri, Pablo; Juster, Allison; Espinosa, Horacio D.

doi:10.1016/j.jmbbm.2010.11.006

Cited by 61 publications

(35 citation statements)

References 41 publications

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“…Haversian bone, for example, is capable of undergoing high inelastic strains because of its unique microcracking process that gradually develops in its concentric lamellae [9]. Nacre's inelastic deformation is attributed to progressive sliding and stable pull-out of its platelets [10,11]. In both cases, a well-balanced interplay between microstructural parameters and constituent properties is crucial for the activated damage mechanisms [10].…”

Section: Introductionmentioning

confidence: 99%

Introducing ductility in hybrid carbon fibre/self-reinforced composites through control of the damage mechanisms

Swolfs

Meerten

Hine

et al. 2015

Composite Structures

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a b s t r a c tCarbon fibre composites possess excellent mechanical properties, but suffer from brittleness. Hybridisation with self-reinforced polypropylene (SRPP) is a promising strategy to introduce ductility into carbon fibre-reinforced polypropylene (CFRPP). The present work demonstrates how different damage mechanisms in these hybrid composites change as a function of the carbon fibre volume fraction, the directionality of CFRPP and SRPP and their relative layer thickness. Multiple fractures of the CFRPP layers or ''fragmentation'' is achieved by optimising these parameters. This leads to a ductile hybrid composite with a gradual failure development.

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Section: Introductionmentioning

confidence: 99%

Introducing ductility in hybrid carbon fibre/self-reinforced composites through control of the damage mechanisms

Swolfs

Meerten

Hine

et al. 2015

Composite Structures

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“…The performance of nacre-like engineering composites at the macroscale (millimetre-size) has only been scarcely explored [8,10,12,13]; some recent investigations have shown their strong potential with respect to performance in sustaining impact and blast loading when compared to traditional laminated composite plates or bulk plates. A recent numerical work by Knipprath et al [12] showed that the impact response of boron carbide ceramic can be improved by using a simplified nacre-like structural design that promotes crack delocalization.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the impact behaviour of bioinspired nacre-like aluminium composite plates

Flores‐Johnson

Shen

Guiamatsia

et al. 2014

Composites Science and Technology

134

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Inspired by the hierarchical structure of nacre, an aluminium alloy (AA) 7075 based composite featuring layer waviness and cohesive interface is studied as a low weight impact resistant material. To investigate the mechanical response and the ballistic performance of this laminated structure, a numerical study of the proposed nacre-like composite plates made of 1.1-mm thick AA 7075 tablets bonded with toughened epoxy resin was performed using Abaqus/Explicit. Target thicknesses of 5.4-mm, 7.5-mm and 9.6-mm impacted by a rigid hemi-spherical projectile were simulated. The epoxy material was modelled using a user-defined interface cohesive element with compressive strength enhancement. A significant performance improvement was recorded for the 5.4-mm nacre-like plate (compared to the same thickness bulk plate), which was explained by the hierarchical structure facilitating both localized energy absorption (by deformation of the tablet) and more globalized energy absorption (by inter-layered delamination and friction). For a given projectile, however, the performance improvement of using the proposed composite decreased with increasing laminate thickness, which was attributed to the increased likelihood of ductile failure occurring prior to perforation in thicker bulk plates. For 5.4-mm thick plates impacted at high velocity, the nacre-like plate had a better ballistic performance than that of the plates made of continuous (flat and wavy) layers, which was attributed to the larger area of plastic deformation (observed in the nacrelike plate after impact) due to the tablets arrangement.

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“…Highperformance lightweight materials such as wood, bone and abalone shells, made of relatively weak and mundane constituents, are the result of evolutionary developments [5][6][7][8]. These natural materials deform via several energy-absorbing mechanisms resulting a remarkable combination of stiffness, strength and toughness [9]. Nacre, the iridescent material found in mollusk shells, is a biological material that exhibits outstanding mechanical properties due to its complex hierarchical structure organized over several length scales [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…These natural materials deform via several energy-absorbing mechanisms resulting a remarkable combination of stiffness, strength and toughness [9]. Nacre, the iridescent material found in mollusk shells, is a biological material that exhibits outstanding mechanical properties due to its complex hierarchical structure organized over several length scales [9,10]. Around 95% of nacre is made of aragonite tablets (a brittle mineral), which are surrounded by a soft organic biopolymer that "glues" them together [11].…”

Section: Introductionmentioning

confidence: 99%

“…The behaviour and mechanical properties of nacre have been extensively studied [11,13,16]; however, the performance of nacre-like engineering composites at the macroscale (millimetre-size) has only been scarcely explored [9,12,14,17,18]. Some recent work have shown the strong potential of nacre-like structures with respect to performance in sustaining blast and impact loading when compared to traditional laminated composite plates or bulk plates.…”

Section: Introductionmentioning

confidence: 99%

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A numerical study of bioinspired nacre-like composite plates under blast loading

Flores‐Johnson

Shen

Guiamatsia

et al. 2015

Composite Structures

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Abstract:In this paper, a multi-layered composite inspired by the hierarchical structure of nacre and made of layers of aluminium alloy AA 7075 bonded with toughened epoxy resin is introduced for blast resistant applications. The performance of the proposed nacre-like 3.3-mm and 5.4-mm thick composite plates, made of 1.1-mm thick AA 7075 layers, under localised impulsive loading was numerically studied. The epoxy material was modelled using user-defined interface cohesive elements that properly take into account both strength and toughness enhancements under compression. As compared to bulk plates, the improvement in blast resistance performance was numerically observed in the nacre-like plates, which required larger loads to reach the onset of failure. In addition, a reduction of the peak velocity and maximum deflection of the back face was observed for the nacre-like plates. This improvement is explained by the hierarchical structure facilitating a globalized energy absorption by inter-layer interlocking, delamination and friction.

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Dimensional analysis and parametric studies for designing artificial nacre

Cited by 61 publications

References 41 publications

Introducing ductility in hybrid carbon fibre/self-reinforced composites through control of the damage mechanisms

Introducing ductility in hybrid carbon fibre/self-reinforced composites through control of the damage mechanisms

Numerical investigation of the impact behaviour of bioinspired nacre-like aluminium composite plates

A numerical study of bioinspired nacre-like composite plates under blast loading

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