Catastrophic failure of nacre under pure shear stresses of torsion

Alghamdi, Saleh; Tan, Ting; Hale-Sills, Christopher; Vilmont, Floyd; Xia, Tian; Yang, Jie; Huston, Dryver R.; Dewoolkar, Mandar M.

doi:10.1038/s41598-017-13492-z

Cited by 42 publications

(27 citation statements)

References 42 publications

(38 reference statements)

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“…The more extreme dependence in the argonaut shell suggests either a greater water absorption capacity or perhaps some different interaction with water owing to a different organic matrix compared to the nautilid shell [39]. However, if one had compared the properties of these shell structures in their 'dry' state [8,[54][55][56][57], almost no difference in their mechanical performance would have been reported. It should be noted, however, that the rehydrated state does not necessarily capture the original properties of the shell in life due to the potential impact of soft-tissue degradation on the mechanics of the tissues [58,59], though the actual potential impact of this degradation is unknown.…”

Section: Discussionmentioning

confidence: 99%

Wet shells and dry tales: the evolutionary ‘Just-So’ stories behind the structure–function of biominerals

Lemanis

Tadayon

Reich

et al. 2022

J. R. Soc. Interface.

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The ability of evolution to shape organic form involves the interactions of multiple systems of constraints, including fabrication, phylogeny and function. The tendency to place function above everything else has characterized some of the historical biological literature as a series of ‘Just-So’ stories that provided untested explanations for individual features of an organism. A similar tendency occurs in biomaterials research, where features for which a mechanical function can be postulated are treated as an adaptation. Moreover, functional adaptation of an entire structure is often discussed based on the local characterization of specimens kept in conditions that are far from those in which they evolved. In this work, environmental- and frequency-dependent mechanical characterization of the shells of two cephalopods, Nautilus pompilius and Argonauta argo , is used to demonstrate the importance of multi-scale environmentally controlled characterization of biogenic materials. We uncover two mechanistically independent strategies to achieve deformable, stiff, strong and tough highly mineralized structures. These results are then used to critique interpretations of adaptation in the literature. By integrating the hierarchical nature of biological structures and the environment in which they exist, biomaterials testing can be a powerful tool for generating functional hypotheses that should be informed by how these structures are fabricated and their evolutionary history.

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Section: Discussionmentioning

confidence: 99%

Wet shells and dry tales: the evolutionary ‘Just-So’ stories behind the structure–function of biominerals

Lemanis

Tadayon

Reich

et al. 2022

J. R. Soc. Interface.

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“…As a comparison, adhesive forces were collected between steel and high purity calcium carbonate specimens. Some natural materials were made of calcium carbonate, such as sea shells (aragonite and calcite) and Iceland spar (calcite) . In this study, Iceland spar was selected since calcite was also found in the hydrated products of cement .…”

Section: Methodsmentioning

confidence: 99%

An experimental study on adhesion between steel and cement pastes using particle probe scanning force microscopy

Yang

Hughes

et al. 2018

J Am Ceram Soc

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This paper presents a method of using particle probe scanning force microscopy to measure the adhesion between steel microspheres and cement pastes. Particle probes were fabricated by attaching steel microspheres to the free ends of microcantilevers. Adhesive forces were collected between steel microspheres and new (4‐week old) and old (6‐month old) cement substrates in air and saturated lime water. For new cement in saturated lime water, adhesive forces between steel and low density C‐S‐H, high density C‐S‐H and other hydrated products were intermediate among all groups selected. The adhesive forces between steel and calcium hydroxide were the smallest, whereas the adhesive forces between steel and the unreacted phases were the largest. For the 6‐month old cement, the interweaving of calcium carbonate crystals and C‐S‐H during carbonation generated greater adhesive forces to steel.

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“…These and other mechanisms cause energy dissipation at various length scales through crack blunting, crack branching, nucleation of micro-defects, and platelet pullout 14 , 15 , 18 . Synthetic composites mimicking this hard-soft combination of phases have been fabricated in the past through additive manufacturing 4 , 19 – 29 , 3D magnetic printing 26 , 30 , freeze casting and ice templating 13 , 31 , layer-by-layer deposition 32 , or foaming processes 33 , 34 .…”

Section: Introductionmentioning

confidence: 99%

Length-scale dependency of biomimetic hard-soft composites

Mirzaali

Edens

Nava

et al. 2018

Sci Rep

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Biomimetic composites are usually made by combining hard and soft phases using, for example, multi-material additive manufacturing (AM). Like other fabrication methods, AM techniques are limited by the resolution of the device, hence, setting a minimum length scale. The effects of this length scale on the performance of hard-soft composites are not well understood. Here, we studied how this length scale affects the fracture toughness behavior of single-edge notched specimens made using random, semi-random, and ordered arrangements of the hard and soft phases with five different ratios of hard to soft phases. Increase in the length scale (40 to 960 μm) was found to cause a four-fold drop in the fracture toughness. The effects of the length scale were also modulated by the arrangement and volumetric ratio of both phases. A decreased size of the crack tip plastic zone, a crack path going through the soft phase, and highly strained areas far from the crack tip were the main mechanisms explaining the drop of the fracture toughness with the length scale.

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Catastrophic failure of nacre under pure shear stresses of torsion

Cited by 42 publications

References 42 publications

Wet shells and dry tales: the evolutionary ‘Just-So’ stories behind the structure–function of biominerals

Wet shells and dry tales: the evolutionary ‘Just-So’ stories behind the structure–function of biominerals

An experimental study on adhesion between steel and cement pastes using particle probe scanning force microscopy

Length-scale dependency of biomimetic hard-soft composites

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