Bio-inspired vertex modified lattice with enhanced mechanical properties

Wang, Peng; Yang, Fan; Li, Pengfei; Zhang, Weiren; Lu, Guoxing; Fan, Hualin

doi:10.1016/j.ijmecsci.2022.108081

Cited by 39 publications

(6 citation statements)

References 54 publications

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“…In the context of bio-inspired design, hierarchy and structural gradient are effective principles; while hierarchy generates micro-structures at multiple and different length scales, structural gradient drives the spatial distribution of materials. Hierarchy and structural gradient may produce enhanced mechanical and multi-functional properties in bio-inspired lattice metamaterials [12][13][14][15][16][17][18][19][20]. For example, a soft network lattice metamaterial combining two-dimensional lattice topologies (e.g.…”

Section: Design Methodologies and Typologiesmentioning

confidence: 99%

Current developments in elastic and acoustic metamaterials science

Failla,

Marzani,

Palermo

et al. 2024

Phil. Trans. R. Soc. A.

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The concept of metamaterial recently emerged as a new frontier of scientific research, encompassing physics, materials science and engineering. In a broad sense, a metamaterial indicates an engineered material with exotic properties not found in nature, obtained by appropriate architecture either at macro-scale or at micro-/nano-scales. The architecture of metamaterials can be tailored to open unforeseen opportunities for mechanical and acoustic applications, as demonstrated by an impressive and increasing number of studies. Building on this knowledge, this theme issue aims to gather cutting-edge theoretical, computational and experimental studies on elastic and acoustic metamaterials, with the purpose of offering a wide perspective on recent achievements and future challenges. This article is part of the theme issue ‘Current developments in elastic and acoustic metamaterials science (Part 1)’.

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Section: Design Methodologies and Typologiesmentioning

confidence: 99%

Current developments in elastic and acoustic metamaterials science

Failla,

Marzani,

Palermo

et al. 2024

Phil. Trans. R. Soc. A.

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“…The data was exported from the simulations in the form of the deformation gradient and the first Piola-Kirchhoff stress, respectively. In the field of continuum mechanics, the relationship between the initial configuration 𝐗 and the current configuration 𝐱 is represented by the deformation gradient 𝐅, as given in Equation (1).…”

Section: An Ann-based Data-driven Constitutive Model For Lattice-stru...mentioning

confidence: 99%

“…As a result, lattice-structured materials provide a diverse combination of tailorable thermos-mechanical properties that make them an attractive case of research in recent years. These outstanding properties include tailorable mechanical strength and stiffness [1,2], a lightweight property [3,4], excellent energy absorption ability [5,6] and impact absorption [7,8]. Therefore, lattice-structured materials have been nominated for several potential industrial applications within the aerospace, personal protective equipment, sports equipment, packaging, military and defence, and medical equipment sectors [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A Data-Driven Constitutive Model for 3D Lattice-Structured Material Utilising an Artificial Neural Network

Hussain,

Sakhaei,

Shafiee

2024

Applied Mechanics

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A new data-driven continuum model based on an artificial neural network is developed in this study for a new three-dimensional lattice-structured material design. The model has the capability to capture and predict the nonlinear elastic behaviour of the specific lattice-structured material in the three-dimensional continuum description after being trained through the appropriate dataset. The essential data as the input ingredients of the data-driven model are provided through a hybrid method including experimental and unit-cell level finite element simulations under comprehensive loading scenarios including uniaxial, biaxial, volumetric, and pure shear loading. Furthermore, the lattice-structured samples are also fabricated using SLA additive manufacturing technology and the experimental measurements are performed and used for validation of the model. This then illustrates that the current model/methodology is a robust and powerful numerical tool to conduct the homogenization in complex simulation cases and could be used to accelerate the analysis and optimization during the design process of new lattice-structured materials. The model could also easily be used for other engineered materials by updating the dataset and re-training the ANN model with new data.

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“…Based on these structures, some embedded and hybrid concepts have been introduced by reorganizing and rebuilding spatial nodes and struts. [15][16][17][18] Afterwards, the concept of hollow trusses has been proposed. [19][20][21][22] Over time, the geometry unit cells of topological innovation, like the hexagonal, [23] Kagome, [24] auxetic, [25] Steiner, [26] and tensegrity metamaterials, [27] expand the design space as an attempt to achieve improved strength-to-weight ratio and unique deformation properties.…”

Section: Introductionmentioning

confidence: 99%

Superior Strength, Toughness, and Damage‐Tolerance Observed in Microlattices of Aperiodic Unit Cells

Wang,

Li,

et al. 2024

Small

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Characterized by periodic cellular unit cells, microlattices offer exceptional potential as lightweight and robust materials. However, their inherent periodicity poses the risk of catastrophic global failure. To address this limitation, a novel approach, that is to introduce microlattices composed of aperiodic unit cells inspired by Einstein's tile, where the orientation of cells never repeats in the same orientation is proposed. Experiments and simulations are conducted to validate the concept by comparing compressive responses of the aperiodic microlattices with those of common periodic microlattices. Indeed, the microlattices exhibit stable and progressive compressive deformation, contrasting with catastrophic fracture of periodic structures. At the same relative density, the microlattices outperform the periodic ones, exhibiting fracture strain, energy absorption, crushing stress efficiency, and smoothness coefficients at least 830%, 300%, 130%, and 160% higher, respectively. These improvements can be attributed to aperiodicity, where diverse failure thresholds exist locally due to varying strut angles and contact modes during compression. This effectively prevents both global fracture and abrupt stress drops. Furthermore, the aperiodic microlattice exhibits good damage tolerance with excellent deformation recoverability, retaining 76% ultimate stress post‐recovery at 30% compressive strain. Overall, a novel concept of adopting aperiodic cell arrangements to achieve damage‐tolerant microlattice metamaterials is presented.

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Bio-inspired vertex modified lattice with enhanced mechanical properties

Cited by 39 publications

References 54 publications

Current developments in elastic and acoustic metamaterials science

Current developments in elastic and acoustic metamaterials science

A Data-Driven Constitutive Model for 3D Lattice-Structured Material Utilising an Artificial Neural Network

Superior Strength, Toughness, and Damage‐Tolerance Observed in Microlattices of Aperiodic Unit Cells

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