Results 41 to 50 of about 1,666 (211)

From Shear to Sound: Mechanics–Acoustics Mapping of TPMS Lattices

Advanced Engineering Materials, EarlyView.
Triply periodic minimal surface (TPMS) lattices are mapped across mechanical and acoustic performance, revealing that descriptors validated in compression fail under shear. First‐time comparison with trusses included. A transition from porous to resonance‐driven absorption emerges at 25% density.
Lucía Doyle, María Ángeles Navacerrada, Johan Christensen, Carlos González   +3 more
wiley   +1 more source

Sound absorption by acoustic microlattice with optimized pore configuration [PDF]

The Journal of the Acoustical Society of America, 2018
The great progress in material science and nano-micro fabrication enables the applications of metamaterials with well-defined and well-organized microstructures for noise reduction. However, what intrinsic morphology of the metamaterial would result in optimum sound absorbing efficiency remains uncertain. This work presents a microlattice metamaterial,
Cai, Xiaobing, Yang, Jun, Hu, Gengkai, Lu, Tianjian   +3 more
openaire   +3 more sources

Underwater sound absorption characteristics of the acoustic metamaterials with multiple coupling substructure

Journal of Low Frequency Noise, Vibration and Active Control
The lateral plates are usually used in the field of structural design of acoustic metamaterials (AMs), which can realize the control of AMs on sound waves. Presently, researches on the application of AMs with lateral plates mainly focus on the regulation
Kangkang Shi, Dongsheng Li, Dongsen Hu, Xiaoli Yu, Canlong Ding, Guoyong Jin   +5 more
doaj   +1 more source

Acoustic Properties of Multi-Layer Wool Nonwoven Structures

Journal of Natural Fibers, 2020
Wool insulating materials provide good acoustic insulation and are increasingly used for room insulation. These insulating materials are usually produced using nonwoven techniques.
Jan Broda, Marcin Bączek
doaj   +1 more source

Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading

Advanced Engineering Materials, EarlyView.
This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev, Noah‐Lean Roschlaub, Anne Jung   +2 more
wiley   +1 more source

Prediction and optimization of acoustic absorption performance of quasi-Helmholtz acoustic metamaterials based on LightGBM algorithm

AIP Advances
Optimization of acoustic metamaterial structures and prediction of acoustic absorption properties have received much attention in various fields. This thesis aims to optimize and predict the acoustic absorption performance of quasi-Helmholtz acoustic ...
Jianxin Xu, Weikang Mao, Xiaoqian Yu, Bingfei Liu   +3 more
doaj   +1 more source

A Non‐Reciprocal Architected Porous Medium

Advanced Functional Materials, EarlyView.
ABSTRACT In several fluid flow, energy‐dumping, and energy‐harvesting applications, a dominant flow direction or dominant resistance direction is desirable. In this study, we propose a simple modular geometry that doubles flow resistance in one direction relative to the opposite direction, while maintaining laminar viscous flow.
Clément Vezies, Pablo Zavattieri, Nicolás Silin   +2 more
wiley   +1 more source

Absorption in Hydro-Acoustic Networks

, 2013
Water covers over 70% of the globe, yet our ability to communicate in the underwater environment is limited. Radio and light communication through water suffer from such major issues that acoustic waves are the dominant form of cable-free underwater communication, but themselves suffer from low bandwidth and poor signal quality.
openaire   +2 more sources

Ultrasensitive Anti‐Stokes Luminescence Thermometry in Transition Metal Dichalcogenide Monolayers

Advanced Functional Materials, EarlyView.
We demonstrate a highly sensitive nanothermometer using anti‐Stokes photoluminescence, also known as photoluminescence upconversion (UPL), in monolayer tungsten disulfide. A strong resonantly enhanced UPL is observed, confirming the central role of optical phonons in the PL upconversion mechanism.
Sharada Nagarkar, Fahrettin Sarcan, Elanur Hut, Emiliano R. Martins, Stuart A. Cavill, Thomas F. Krauss, Yue Wang   +6 more
wiley   +1 more source

Modeling the acoustic absorption behaviour of polylactide open cell foams with bimodal structure for high acoustic absorption [PDF]

Proceedings of Meetings on Acoustics, 2013
Through this research, highly porous open cell foams were fabricated with Polylactide (PLA) and Polyethylene glycol (PEG) using compression molding combined with particulate leaching technique. Salt and water soluble polymer were used as the particulates.
Shahrzad Ghaffari Mosanenzadeh, Olivier Doutres, Hani E. Naguib, Chul B. Park, Noureddine Atalla   +4 more
openaire   +1 more source