Nonlinear dynamic analysis and vibration reduction of two sandwich beams connected by a joint with clearance

Mechanical Systems and Signal Processing, Journal Year: 2024, Volume and Issue: 223, P. 111828 - 111828

Published: Aug. 18, 2024

Language: Английский

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Non-contact electromagnetic controlled metamaterial beams for low-frequency vibration suppression

International Journal of Solids and Structures, Journal Year: 2024, Volume and Issue: 290, P. 112667 - 112667

Published: Jan. 20, 2024

Language: Английский

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Integrated design of quasi-zero-stiffness vibration isolators based on bifurcation theory

Aerospace Science and Technology, Journal Year: 2024, Volume and Issue: 146, P. 108940 - 108940

Published: Feb. 2, 2024

Language: Английский

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Band folding induced broadband vibration suppression of star-shaped metamaterials: Theory and experiment

Thin-Walled Structures, Journal Year: 2024, Volume and Issue: 198, P. 111756 - 111756

Published: Feb. 27, 2024

Language: Английский

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Effectively reduce transient vibration of 2D wing with bi-stable metamaterial

International Journal of Mechanical Sciences, Journal Year: 2024, Volume and Issue: 272, P. 109172 - 109172

Published: March 8, 2024

Language: Английский

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Lightweight cellular multifunctional metamaterials with superior low-frequency sound absorption, broadband energy harvesting and high load-bearing capacity

Materials & Design, Journal Year: 2024, Volume and Issue: 241, P. 112912 - 112912

Published: April 2, 2024

Multifunctional materials are highly desired for the design of compact engineering structures, such as aircraft where weight reduction, sound absorption, load carrying, and energy harvesting key considerations. However, challenge remains in balance multiple functionalities. Here, we combine sandwich structure with neck-embedded cavities to a cellular metamaterial having sound-absorption, compression/impact resistance For an autoencoder-like neural network is constructed generate instant design, after which probabilistic module inserted optimize it by searching solutions slightly expanded space. This inverse has been experimentally validated, showing broadband absorption from 400 650 Hz merely nine ultra-thin resonators. Beyond serving absorber, resonant cavities, once installed well-tuned piezoelectric membranes, can gather acoustic at low frequencies. Additionally, inherits excellent mechanical properties honeycomb cores, density 0.64 g/cm3 yet displaying high yield strength (21.2 MPa) out-of-plane compression test superior capability (8.6 J/cm3) low-velocity impact tests. work presents effective approach lightweight metamaterials functionalities sought-after practical engineering.

Language: Английский

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A novel active switchable multi-channel waveguide based on the Bragg scattering mechanism and the force-magnetic coupling effect

Multidiscipline Modeling in Materials and Structures, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Purpose This study aims to propose a novel acoustic metamaterial waveguide with active switchable channels by changing the magnetic field strength. Design/methodology/approach Based on Bragg scattering mechanism and force-magnetic coupling effect of magnetorheological elastomer (MRE), an structure containing lead scatterers MRE/rubber matrix is constructed. By external strength, bandgap can be adjusted, then proposed actively switched. The ranges metamaterials different sizes are designing size scatterers, formed. design control method this will useful for waveguides bandgaps. Findings multi-channel effectively elastic wave propagation, opening closing channel achieved. Practical implications provides new expands application range MRE. concept adjustable extended waveguides, vibration reduction structures. Originality/value article proposes controlled in non-contact manner based principle effect. model established, its feasibility demonstrated through numerical simulations.

Language: Английский

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Nonlinear properties prediction and inverse design of a porous auxetic metamaterial based on neural networks

Thin-Walled Structures, Journal Year: 2024, Volume and Issue: 197, P. 111717 - 111717

Published: Feb. 15, 2024

Language: Английский

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Non-linear dynamics and bandgap control in magneto-rheological elastomers metamaterials with inertial amplification

Thin-Walled Structures, Journal Year: 2024, Volume and Issue: 204, P. 112237 - 112237

Published: July 22, 2024

Language: Английский

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Mechanisms of multi-bandgap inertial amplification applied in metamaterial sandwich plates

International Journal of Mechanical Sciences, Journal Year: 2024, Volume and Issue: 277, P. 109424 - 109424

Published: May 27, 2024

Language: Английский

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