Generative deep learning for designing irregular metamaterials with programmable nonlinear mechanical responses

International Journal of Mechanical Sciences, Journal Year: 2025, Volume and Issue: unknown, P. 110123 - 110123

Published: March 1, 2025

Language: Английский

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Design optimisation of kirigami-based auxetic metamaterials with multistability and shape-morphing capability

Virtual and Physical Prototyping, Journal Year: 2025, Volume and Issue: 20(1)

Published: Jan. 15, 2025

This study presents the development of kirigami-based auxetic metamaterials with multistability and shape-morphing capabilities through a design optimisation framework leveraging machine learning technology. The employs surrogate models differential evolution algorithm to optimise variables kirigami cell, ensuring specified bistability scalability conditions. cell-level is extended structure-level, where each cell optimised for its assigned scalability. For multistability, structure divided into subregions distinct levels, conducted accordingly. shape morphing, expansion ratio predefined according target geometry, performed ensure required Various structures, combining different levels geometries, are optimally designed additively manufactured experimental validation. results confirm that proposed effectively controls behaviour, enabling tunable shapes morphing programmed transformation sequences.

Language: Английский

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Novel metamaterial structures with negative thermal expansion and tunable mechanical properties

International Journal of Mechanical Sciences, Journal Year: 2023, Volume and Issue: 261, P. 108692 - 108692

Published: Aug. 25, 2023

Language: Английский

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Metamaterial with synergistically controllable Poisson's ratio and thermal expansion coefficient

International Journal of Mechanical Sciences, Journal Year: 2023, Volume and Issue: 256, P. 108488 - 108488

Published: May 24, 2023

Language: Английский

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A hybrid design for bending and stretching dominated metamaterial with tailorable thermal expansion

Composite Structures, Journal Year: 2023, Volume and Issue: 323, P. 117474 - 117474

Published: Aug. 15, 2023

Language: Английский

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Zero-thermal-expansion metamaterial with broadband vibration suppression

International Journal of Mechanical Sciences, Journal Year: 2023, Volume and Issue: 258, P. 108590 - 108590

Published: July 2, 2023

Language: Английский

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Anisotropic thermal expansion based on a novel metamaterial

International Journal of Mechanical Sciences, Journal Year: 2024, Volume and Issue: 268, P. 109024 - 109024

Published: Jan. 8, 2024

Language: Английский

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A multifunctional three-dimensional lattice material integrating auxeticity, negative compressibility and negative thermal expansion

Composite Structures, Journal Year: 2024, Volume and Issue: 337, P. 118032 - 118032

Published: March 16, 2024

This manuscript presents a pioneering three-dimensional lattice structure that can simultaneously exhibit negative Poisson's ratio (NPR), compressibility (NC), and thermal expansion (NTE). The coexistence of the three indexes, whether in natural materials or artificial structures, is extremely rare. unit cell integrates an auxetic egg-rack with non-auxetic cage-like structure. Analytical expressions for elastic constants are derived by using Euler-Bernoulli beam theory subsequently validated through finite element simulations. analytical results show exhibits not only NPR, but also NC direction specific areas as well NTE direction, certain areas, even throughout entire volume when appropriately tailored geometries constituent employed. Furthermore, parametric analysis revealed these properties be adjusted within broader range, encompassing positive values, enabling diverse combinations. Metamaterials possess multiple adjustable enable development multifunctional devices capable adapting to mechanical loads, hydrostatic pressures, temperature fluctuations.

Language: Английский

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A series of auxetic metamaterials with negative thermal expansion based on L-shaped microstructures

Thin-Walled Structures, Journal Year: 2024, Volume and Issue: 197, P. 111596 - 111596

Published: Jan. 17, 2024

Language: Английский

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Mechanical property enhancement in additively manufactured NiTi double-asymmetric honeycombs with bioinspired graded design

Virtual and Physical Prototyping, Journal Year: 2024, Volume and Issue: 19(1)

Published: Feb. 28, 2024

The cuttlebone is known for its ability to possess high specific stiffness, progressive failure and lightweight from the porous chambered structure. Inspired by microstructural characteristics of incorporating wall gradient design, a series double-asymmetric honeycombs were designed processed LPBF. Results indicated that bionic structural units with junction design can maintain integrity residual parts after local buckling failure, improving load-bearing capacity. honeycomb gradation parameter α = 2/3 achieved maximum compressive strength 70.64 MPa cm3/g. As decreases, there an increase in energy absorption narrowing hysteresis loop. as-build had undergone stress-induced martensite transformation during compression. dissipated mechanical (ME) decreased increasing cycle number decreasing α. results provide guidelines process strategies developing high-performance honeycombs.

Language: Английский

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