Results 81 to 90 of about 4,652,142 (278)

Wave propagation in functionally graded piezoelectric-piezomagnetic rectangular bars

Science and Engineering of Composite Materials, 2017
In recent years, guided wave propagation in piezoelectric-piezomagnetic composite (PPC) structures are paid much attention for the design and optimization of PPC transducers. Previous investigations are mainly limited in horizontally infinite flat plates,
Zhang Bo, Yu Jiangong, Shah Abid A., Yang Xiaodong   +3 more
doaj   +1 more source

Electrospun Wood‐Derived Biopolymers as Electrodes in Electrochemical Energy Storage Technologies

Advanced Functional Materials, EarlyView.
Electrospinning transforms wood‐derived cellulose and lignin into architecturally defined, binder‐free carbon electrodes with tuneable porosity and functionality. This review shows how fibre design enables decoupled charge and mass transport, enhancing performance across battery systems, while identifying key challenges in spinnability, scalability ...
Michael W. Thielke, Hattie R. Chisnall, Jesus Vazquez Chavez, Ana B. Jorge Sobrido   +3 more
wiley   +1 more source

Assessment of the Structural Integrity of Water Reservoir Dams Using Seismic Refraction and Surface Waves Methods

Albanian Journal of Natural and Technical Sciences
Seismic methods, including refraction and surface wave techniques in one- and two-dimensional forms, are widely used to assess the technical condition of water reservoir dams.
Erald Silo, Rrapo Ormeni
doaj   +1 more source

Implantable Ionic Memristors Based on Natural Polymer Heterojunctions

Advanced Functional Materials, EarlyView.
We report an implantable natural polymer‐based ionic memristor composed of hyaluronic acid, chitosan, and PDMS. The device achieved 98.94% accuracy in MNIST classification while reducing training time by 36.8% compared with a conventional artificial neural network (ANN).
Dong‐yup Lee, Byung Ik Park, Gihyeon Yim, Hyunjae Yoo, Sangjun Ma, Jundong Park, Jeong‐Yun Sun   +6 more
wiley   +1 more source

On the development and testing of a guided ultrasonic wave array for structural integrity monitoring [PDF]

, 2006
The prototype of a guided ultrasonic wave array for the structural integrity monitoring of large, plate-like structures has been designed, built, and tested.
Wilcox, PD, Fromme, P, Cawley, P, Canvley, P, Lowe, MJS   +4 more
core   +1 more source

Strong Lead‐Free Bioinspired Piezoceramics for Durable Energy Transducers

Advanced Functional Materials, EarlyView.
We fabricated brick‐and‐mortar lead‐free piezoceramics with Bi0.5Na0.5TiO3 monocrystal platelets as bricks and amorphous silica as mortar. The alignment of the bricks and the presence of the amorphous silica led to anisotropic residual stresses. These residual stresses increase the samples toughness, strength and durability while the brick alignment ...
Ruxue Yang, Temesgen Tadeyos Zate, Peiren Wang, Soumyajit Mojumder, Elo Overgaard Mogensen, Oriol Gavalda‐Diaz, Zihe Li, Shitong Zhou, Ajeet Kumar, James Roscow, Hamideh Khanbareh, Astri Bjørnetun Haugen, Florian Bouville   +12 more
wiley   +1 more source

Elasticidade, plasticidade, histerese... e ondas

Revista Brasileira de Ensino de Física
Neste artigo é descrito um experimento que permite estudar as propriedades mecânicas de fios sob tração. O experimento requer um monocórdio, no qual o fio é esticado e tangido, um microcomputador com placa de som e um software para análise espectral do ...
Luiz André Mützenberg, Eliane Angela Veit, Fernando Lang da Silveira   +2 more
doaj  

An Edible Chitosan‐Based Acoustic Sensor for Sound‐Responsive Actuation in Edible Robots

Advanced Functional Materials, EarlyView.
This study introduces an edible acoustic sensor for robotic food and edible robotics. Built from a chitosan piezoelectric film between gold electrodes, the sensor enables acoustic communication through ON/OFF keying. Integrated into an edible robot with pneumatically actuated arms and neck, it responds to high‐frequency tones.
Valerio Francesco Annese, Bokeon Kwak, Gaia de Marzo, Giulia Coco, Valentina Antonaci, Leonardo Lamanna, Massimo De Vittorio, Dario Floreano, Mario Caironi   +8 more
wiley   +1 more source

Mechanical and Tribological Behavior of Unsaturated Polyester NanoCarbon Black Composite

Journal of Engineering and Sustainable Development, 2013
Experimental work had been done to demonstrate the effect of nanocarbon black particles (N220) contents on the mechanical and tribological behavior of unsaturated polyester nanocomposite prepared via the ultrasonic wave dispersion method.
Amer Hameed Majeed , Mohammed S. Hamza, Hayder Raheem Kareem   +2 more
doaj  

Quantum-modified photo-thermoelastic wave propagation in semiconductors with temperature-dependent thermal conductivity

Scientific Reports
A generalized quantum-modified photo-thermoelastic model is developed to investigate wave propagation in semiconductor media subjected to ramp-type laser heating while accounting for temperature-dependent thermal conductivity.
Samar Alshalhoub, Fulin Shang, Gamal M. Ismail, Lotfi Jlali, Ibrahim S. Elshazly, Khaled Lotfy   +5 more
doaj   +1 more source