Results 111 to 120 of about 9,838,392 (346)

On Damping Properties of a Plucked String

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C, 1984
A plucked string of musical instrument damps abnormally at specific frequencies. In order to investigate this phenomenon called "dead point", we measured the damping of a plucked string supported at two points on a simply supported beam. Consequently, when the natural frequencies of the system with strong coupling between the string and the beam ...
NAKAI, Mikio, KITANO, Yukihiko
openaire   +3 more sources

Tuning Amorphous‐Crystalline Catalytic Interfaces by Mechanochemistry: Cu‐Based Metallic Glasses Coupled with Ceria for CO Oxidation

Advanced Materials, EarlyView.
Ball‐milling Cu‐based metallic glasses with ceria creates a unique nanostructure where metallic glass particles are wrapped by CeO2 nanoparticles. The intimate integration triggers copper state reorganization during reaction and aging, boosting CO oxidation and COPrOx activity.
Maahin Mirzay‐Shahim, Mehran Nabahat, Laia Pascua‐Solé, Isabel Serrano, Ilaria Lucentini, Xènia Garcia, Marina Armengol‐Profitós, Asier Agrelo‐Lestón, Ignasi Burgués‐Ceballos, Núria J. Divins, Ignacio J. Villar‐Garcia, Virginia Pérez‐Dieste, Carlos Escudero, Carlo Marini, Jordi Llorca, Eloi Pineda, Pere Bruna, Lluís Soler   +17 more
wiley   +1 more source

Flexoelectrically Induced Polar Topology in Twisted SrTiO3 Membranes

Advanced Materials, EarlyView.
Twisted SrTiO3 bilayers host polar vortices of flexoelectric origin, revealed through combined experiment and theory. By reconstructing polarization from the toroidal moment of strain gradients, the work establishes a 3D chiral state with broken inversion and mirror symmetries.
Isabel Tenreiro, Hugo Aramberri, Víctor Rouco, Gabriel Sánchez‐Santolino, Mariona Cabero, Fernando Gallego, David Sánchez‐Manzano, José M. González‐Calbet, Federico Mompeán, Mar García‐Hernández, Alberto Rivera‐Calzada, Jorge Íñiguez‐González, Carlos León, Jacobo Santamaría   +13 more
wiley   +1 more source

A study of significant factors affecting viscoelastic damping properties of polymer materials

, 2018
Viscoelastic behaviour of materials is connected with transformation of mechanical energy into heat, which is a measure of a material structural damping. Viscoelastic properties of materials are described by different quantities, e.g.
Vašina, Martin, Pöschl, Marek, Zádrapa, Petr   +2 more
core  

Intelligent Acousto‐Electrical Metamaterials (IAM) for Sound Source Detection

Advanced Materials, EarlyView.
Our proposed metamaterial concept enables sound source detection using a single material, in contrast to conventional arrays that require dozens or even hundreds of transducers. We show that the coupled acoustic–vibrational–electrical responses in piezoelectric metamaterials give rise to topology‐governed charge transport, producing distinct voltage ...
Victor Couëdel, Haotian Lu, Jiayan Zhang, Desheng Yao, Ananya Bhardwaj, Ramiro Contreras, Karim Sabra, Xiaoyu (Rayne) Zheng   +7 more
wiley   +1 more source

Stiffness and Damping Properties of LPBF-Fabricated TC4 Alloy Beams Incorporating Self-Sealing Powder and Lattice Structures

Metals
Laser powder bed fusion (LPBF) provides an effective method for the preparation of self-sealing powder damping components, but the introduction of cavities simultaneously leads to a decrease in the mechanical properties of the components.
Yong Xu, Zheng Xiang, Chenyu Zhang, Jingang Tang, Xiaohui Ge, Tianhao Zhang, Mingyan Sun, Zhihui Xia, Jie Chen, Shuke Huang   +9 more
doaj   +1 more source

Quantitative Analysis of Damping Enhancement and Piezoelectric Effect Mechanism of CNTs/PMN/EP Composites

Advances in Materials Science and Engineering, 2018
New types of piezoelectric damping materials, including carbon nanotubes (CNTs)/lead magnesium niobate (PMN)/epoxy (EP) resin, are developed. The tan δ area (TA) analysis method is selected to evaluate the damping properties which obviously clarifies the
Shiyue Pan, Meijuan Li, Fei Chen, Zhixiong Huang, Qiang Shen, Lianmeng Zhang   +5 more
doaj   +1 more source

Mechanical behaviour and damping properties of Ni modified Cu–Zn–Al shape memory alloys

Journal of Science: Advanced Materials and Devices, 2018
The microstructure, mechanical behaviour and damping properties of Cu–18Zn–7Al–xNi alloys (where x = 0.1, 0.2, 0.3 and 0.4) were investigated. The Cu–Zn–Al alloys were produced by casting and then subjected to a homogenization – cold rolling – annealing ...
K. Alaneme, Shaibu Umar
semanticscholar   +1 more source

3D Anodic Alumina Nanoarchitectures: A Decade of Progress from Foundational Science to Functional Metamaterials

Advanced Materials, EarlyView.
Ordered three‐dimensional anodic aluminum oxide (3D‐AAO) nanoarchitectures with longitudinal and transverse pores enable architecture‐driven metamaterials. The review maps fabrication advances, including hybrid pulse anodization, and shows how 3D‐AAO templates tailor properties across magnetism, energy, catalysis, and sensing.
Marisol Martín‐González
wiley   +1 more source

An investigation into the design for vibration damping of extended length tool holders [PDF]

This thesis presents a theoretical and experimental investigation into the design of extended length tool holders, with specific emphasis on vibration damping and the attenuation of chatter in boring bars.
Shirvani, Ayoub
core