Engineering toughening mechanisms in architectured ceramic-based bioinspired materials

Rahimizadeh, Amirmohammad; Sarvestani, Hamidreza Yazdani; Li, L.; Robles, J. Barroeta; Bäckman, David; Lessard, Larry; Ashrafi, Behnam

doi:10.1016/j.matdes.2020.109375

Cited by 27 publications

(28 citation statements)

References 27 publications

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“…The laser produces a Gaussian spatial profile beam of a maximum power output of 50 W, with a 3 ps pulse duration and a 25 µJ average pulse energy of 1030 nm wavelength. In previous studies, [39,40] a procedure was developed using a circular wobble pattern with the laser scanner to ensure that thermal damage and micro-cracks were minimized. The geometries of the three cell regularities were imported into the laser scanning software from 2D drawings in SolidWorks.…”

Section: Hybrid Manufacturingmentioning

confidence: 99%

Bioinspired Stochastic Design: Tough and Stiff Ceramic Systems

Sarvestani

Egmond

Esmail

et al. 2021

Adv Funct Materials

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Ceramics possess desirable stiffness, compressive strength, and thermal properties compared to alternative material classes. Despite this, the adoption of ceramics into advanced industries has been hindered by their inherent brittleness. Using a state-of-the-art manufacturing platform, the authors incorporate disordered microstructural features inspired by those found in natural, impact-resistant organisms using tessellated ceramic cells. To precisely mimic these natural patterns, a disorder parameter is introduced to modulate the stochasticity of the ceramic architectures. By modifying simple geometrical features such as cut depth and the disorder parameter, the energy absorption is dramatically improved, and the stiffness of the system can be tailored. It is found that the stochastic designs exhibit elevated damage tolerance, denoted by higher dynamic energy absorption (up to 330% for the 3rd impact) and stiffness (up to 200% for the 3rd impact) than both monolithic and perfectly hexagonal architectures. The results show a superior multi-hit resistance owing to optimal cut depth and stochasticity which give access to extrinsic toughening mechanisms that can be influenced through design parameters. This highly-scalable, digital manufacturing platform for creating numerically programmable architectures propels the automated production of intelligent, high-performance, and tailorable ceramic systems for industrial applications in aerospace, protective devices, and medicine.

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Section: Hybrid Manufacturingmentioning

confidence: 99%

Bioinspired Stochastic Design: Tough and Stiff Ceramic Systems

Sarvestani

Egmond

Esmail

et al. 2021

Adv Funct Materials

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“…The brittleness of bioceramics significantly limits their applications because in addition to strength, adequate toughness is required to sustain the biomechanical loads [86].…”

Section: Toughening Strategies For Bioceramic Compositesmentioning

confidence: 99%

“…As the advances in bone tissue engineering move toward application in the clinical setting, achieving adequate bioceramic toughness for clinical applications is particularly critical. In this context, recent computational approaches have been proposed in order to predict the crack propagation pathways, while increasing the toughness of ceramic-based bioinspired materials [86].…”

Section: Introductionmentioning

confidence: 99%

Toughening of Bioceramic Composites for Bone Regeneration

et al. 2021

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Bioceramics are widely considered as elective materials for the regeneration of bone tissue, due to their compositional mimicry with bone inorganic components. However, they are intrinsically brittle, which limits their capability to sustain multiple biomechanical loads, especially in the case of load-bearing bone districts. In the last decades, intense research has been dedicated to combining processes to enhance both the strength and toughness of bioceramics, leading to bioceramic composite scaffolds. This review summarizes the recent approaches to this purpose, particularly those addressed to limiting the propagation of cracks to prevent the sudden mechanical failure of bioceramic composites.

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“…Of the bioinspiration strategies which offer a toughness enhancement, the “topologically interlocking concept” consists of hard and stiff building blocks bonded along weak interfaces 8 – 10 . The challenge lies in the precise and industrially-scalable manufacturing of such mechanically enhanced structures 8 , 11 – 13 .…”

Section: Introductionmentioning

confidence: 99%

Interlocking design, programmable laser manufacturing and testing for architectured ceramics

Sarvestani

Esmail

Katz

et al. 2022

Sci Rep

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Tough and impact-resistant ceramic systems offer a wide range of remarkable opportunities beyond those offered by the conventional brittle ceramics. However, despite their promise, the availability of traditional manufacturing technique for fabricating such advanced ceramic structures in a highly controllable and scalable manner poses a significant manufacturing bottleneck. In this study, a precise and programmable laser manufacturing system was used to manufacture topologically interlocking ceramics. This manufacturing strategy offers feasible mechanisms for a precise material architecture and quantitative process control, particularly when scalability is considered. An optimized material removal method that approaches near-net shaping was employed to fabricate topologically interlocking ceramic systems (load-carrying assemblies of building blocks interacting by contact and friction) with different architectures (i.e., interlocking angles and building block sizes) subjected to low-velocity impact conditions. These impacts were evaluated using 3D digital image correlation. The optimal interlocked ceramics exhibited a higher deformation (up to 310%) than the other interlocked ones advantageous for flexible protections. Their performance was tuned by controlling the interlocking angle and block size, adjusting the frictional sliding, and minimizing damage to the building blocks. In addition, the developed subtractive manufacturing technique leads to the fabrication of tough, impact-resistant, damage-tolerant ceramic systems with excellent versatility and scalability.

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Engineering toughening mechanisms in architectured ceramic-based bioinspired materials

Cited by 27 publications

References 27 publications

Bioinspired Stochastic Design: Tough and Stiff Ceramic Systems

Bioinspired Stochastic Design: Tough and Stiff Ceramic Systems

Toughening of Bioceramic Composites for Bone Regeneration

Interlocking design, programmable laser manufacturing and testing for architectured ceramics

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