Discrete-element modeling of nacre-like materials: Effects of random microstructures on strain localization and mechanical performance

Abid, Najmul; Mirkhalaf, Mohammad; Barthelat, François

doi:10.1016/j.jmps.2017.11.003

Cited by 76 publications

(47 citation statements)

References 54 publications

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“…Discrete and coarse‐grained models to consider larger computational domains are beginning to exhibit the potential to study biological and bioinspired materials 10e,104,111. Recently Barthelat and co‐workers have developed a discrete element method (DEM) approach to validate some of the hypothesis established by previous modeling work 10a,72b,105.…”

Section: Multiscale Modelingmentioning

confidence: 99%

“…Recently Barthelat and co‐workers have developed a discrete element method (DEM) approach to validate some of the hypothesis established by previous modeling work 10a,72b,105. The discrete element method allowed them to consider larger representative volume elements (RVE) ( Figure ). These models enable the analysis of statistical variations on the fracture mechanisms such as different tablet arrangements, variations in the interface properties, etc.…”

Section: Multiscale Modelingmentioning

confidence: 99%

“…e) Snapshots of the DEM simulations with different degrees of statistical variations and different types of behaviors, clearly showing the delocalization effect around the crack tip. a–c) Reproduced with permission . Copyright 2018, Elsevier.…”

Section: Multiscale Modelingmentioning

confidence: 99%

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Multiscale Toughening Mechanisms in Biological Materials and Bioinspired Designs

et al. 2019

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Biological materials found in Nature such as nacre and bone are well recognized as light-weight, strong, and tough structural materials. The remarkable toughness and damage tolerance of such biological materials are conferred through hierarchical assembly of their multiscale (i.e., atomicto macroscale) architectures and components. Herein, the toughening mechanisms of different organisms at multilength scales are identified and summarized: macromolecular deformation, chemical bond breakage, and biomineral crystal imperfections at the atomic scale; biopolymer fibril reconfiguration/deformation and biomineral nanoparticle/nanoplatelet/ nanorod translation, and crack reorientation at the nanoscale; crack deflection and twisting by characteristic features such as tubules and lamellae at the microscale; and structure and morphology optimization at the macroscale. In addition, the actual loading conditions of the natural organisms are different, leading to energy dissipation occurring at different time scales. These toughening mechanisms are further illustrated by comparing the experimental results with computational modeling. Modeling methods at different length and time scales are reviewed. Examples of biomimetic designs that realize the multiscale toughening mechanisms in engineering materials are introduced. Indeed, there is still plenty of room mimicking the strong and tough biological designs at the multilength and time scale in Nature.

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Section: Multiscale Modelingmentioning

confidence: 99%

Section: Multiscale Modelingmentioning

confidence: 99%

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Multiscale Toughening Mechanisms in Biological Materials and Bioinspired Designs

et al. 2019

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“…Multiple models based on periodic unit cell have been developed to answer the puzzle that is natural nacre mechanical properties [87,88,89,90,91,92].…”

Section: Mechanical Modelling Of Nacre-like Materials Made Of Perfectmentioning

confidence: 99%

Strong and tough nacre-like aluminas: Process–structure–performance relationships and position within the nacre-inspired composite landscape

Bouville

2020

J. Mater. Res.

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“…Moreover, elastic-hardening-softening model ( Fig. 2i) was also proposed [31,32]. Investigations using shear lag model with piecewise linear model ( Fig.…”

Section: Literature Reviewmentioning

confidence: 99%

Effect of viscoelasticity on interfacial stress transfer mechanism in the biocomposites: A theoretical study of viscoelastic shear lag model

Yuan

2019

Composites Part B: Engineering

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Biocomposites with regularly staggered alignment microstructure are frequently observed in natural biological tissues, and exhibit superior mechanical behavior. Owing to their viscoelastic nature, biocomposites exhibit stress rate-dependent stiffness function and mechanical behavior. In this paper, a linear viscoelastic shear lag model (SLM) is proposed to illustrate the micromechanical behavior of biocomposites under triangular loading pulse. Theoretical and numerical results are derived to predict the deformation and stress transfer between fibers and interfibrous matrix while the biocomposites are transiently stretched. The results from the analytical and numerical solutions demonstrate that how the fiber overlap length and loading rate affect the stress transfer and mechanical properties of biocomposties. The structure-property correlation is illustrated for viscoelastic biomaterials under transient loading, and the existence of characteristic length of soft matter with viscoelastic property is involved in load transfer mechanism between the adjacent reinforcements in transient regime, which optimizes the load transfer mechanism between the adjacent reinforcements. Furthermore, we found that discontinuous fibril model could ensure large relative sliding deformation, helping dissipate energy, protecting fibril from overall damage, and achieving high ductility and high toughness, which can provide beneficial design strategies for engineering fiber reinforced composites.

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Discrete-element modeling of nacre-like materials: Effects of random microstructures on strain localization and mechanical performance

Cited by 76 publications

References 54 publications

Multiscale Toughening Mechanisms in Biological Materials and Bioinspired Designs

Multiscale Toughening Mechanisms in Biological Materials and Bioinspired Designs

Strong and tough nacre-like aluminas: Process–structure–performance relationships and position within the nacre-inspired composite landscape

Effect of viscoelasticity on interfacial stress transfer mechanism in the biocomposites: A theoretical study of viscoelastic shear lag model

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