Artificial neural networks for inverse design of a semi-auxetic metamaterial

Thin-Walled Structures, Journal Year: 2024, Volume and Issue: 200, P. 111927 - 111927

Published: April 20, 2024

Language: Английский

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Non-reciprocity and Asymmetric Elasticity in Twisting Chiral Metamaterials

International Journal of Mechanical Sciences, Journal Year: 2025, Volume and Issue: unknown, P. 109990 - 109990

Published: Jan. 1, 2025

Language: Английский

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Recent Advances of Auxetic Metamaterials in Smart Materials and Structural Systems

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Abstract Auxetic metamaterials refer to materials and structures with extraordinary deformation, i.e., transverse expansion (contraction) under uniaxial tension (compression). In recent decades, a very wide range of innovative functional performance has been discovered stemming from this behavior. This desirable exhibition adaptivity, programmability, functionality provides great potential in soft intelligent systems. However, thus far, the mainstream research on auxetic focused subjective design, monotonic mechanical properties, passive tunability. review thorough overview classical properties applications, primary objective proposing new roadmap auxetics for advances interdisciplinary field. The fundamental works are categorized different configurations mechanisms. particular, integration shape morphing, actuation, sensing, multiphysical response, inverse design is reviewed detail. To accelerate development smart structural systems, applications generalized into robotics (outside body), human–machine interaction (surrounding healthcare devices (inside body). Finally, several significant topics emphasized theory, material choice, manufacturing technique, applications.

Language: Английский

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Auxetic mechanical metamaterials with symmetry-broken Re-entrant units

International Journal of Mechanical Sciences, Journal Year: 2023, Volume and Issue: 266, P. 108917 - 108917

Published: Dec. 13, 2023

Language: Английский

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Enhancing the compressive properties of re-entrant honeycombs by line defects with insight from nature

Materials Today Communications, Journal Year: 2023, Volume and Issue: 38, P. 107700 - 107700

Published: Nov. 28, 2023

Language: Английский

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A novel windmill-shaped auxetic structure with energy absorption enhancement

International Journal of Mechanical Sciences, Journal Year: 2024, Volume and Issue: 280, P. 109635 - 109635

Published: Aug. 10, 2024

Language: Английский

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Flexural Behaviors of Asymmetric Re-entrant Auxetic Honeycombs

European Journal of Mechanics - A/Solids, Journal Year: 2024, Volume and Issue: unknown, P. 105475 - 105475

Published: Oct. 1, 2024

Language: Английский

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Experimental mechanical properties, nonlinear bending and instability analysis of 3D-printed auxetic tubular metastructures using multiscale finite element and Ritz methods

Mechanics of Advanced Materials and Structures, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 24

Published: Dec. 10, 2024

In the field of medical technology, specialized equipment utilizes tubular metastructures with a negative Poisson's ratio in vascular stents to reduce risk embolism. The deliberate incorporation auxetic structures into stent design offers several benefits over traditional stents. This study examines nonlinear instability and bending responses reentrant perfect imperfect 3D-printed metastructures. First, governing equations for tube geometric imperfections under transverse axial mechanical loads are derived using von-Kármán assumption Timoshenko theory. Then, principle virtual displacement. physical characteristics structure Malek-Gibson relations, while tensile tests digital image correlation (DIC) used determine properties polylactic acid (PLA). Scanning electron microscopy (SEM) images help investigate variations modulus elasticity ultimate strength dogbone specimens, Ritz method Chebyshev polynomials is employed discretize equations. Second, two numerical algorithms analyze static behavior metatube within framework. validation conducted representative volume element (RVE) unit cell based on literature finite software Abaqus. Following mathematical model, an extensive investigation assess how differing parameters impact analysis tube.

Language: Английский

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Twisting Chiral Mechanical Metamaterials: A Review

Materials Today Communications, Journal Year: 2025, Volume and Issue: unknown, P. 112070 - 112070

Published: March 1, 2025

Language: Английский

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Compressive Behavior of 3D‐Printed Stiffened Bioinspired Tubular Metamaterials

Advanced Engineering Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

This study proposes innovative bioinspired tubular metamaterial structures modeled after the zigzag patterns commonly found in natural systems. The straight, curved and their symmetrical counterparts serve as inspiration for design of a novel biomimetic tube. To enhance mechanical performance these tubes, circumferential stiffeners are incorporated, varying both quantity arrangement. Various samples fabricated using additive manufacturing, experimental testing combined with finite‐element analysis is employed to assess deformation behavior, energy absorption (EA), specific EA (SEA), effective Young's modulus ( E eff ). Results demonstrate that addition significantly enhances capacity behavior by overall Poisson's ratio enhancing stiffness. Straight tubes exhibit highest stiffness, while symmetric show up 33% improvement stiffener integration. Nonsymmetric configurations enhanced integration superior 52%. Stiffeners SEA 42% tubes. parametric further emphasizes critical role geometric parameters optimizing performance. These results provide valuable insights designing advanced high variety applications.

Language: Английский

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