Results 71 to 80 of about 32,268 (336)

From Clinic to Computation: Multiscale Bioengineering Strategies for Durable Biological Aortic Valve Replacements

Advanced Functional Materials, EarlyView.
Bioprosthetic aortic valves have revolutionized the treatment of aortic stenosis, but their durability is limited by structural valve deterioration (SVD). This review focuses on the pericardial tissue at the heart of these valves, examining how its mechanical properties and calcification drive fatigue and failure.
Gabriele Greco, Pierfrancesco Gaziano, Serena Anglese, Simone Morganti, Carlo de Vincentiis, Ferdinando Auricchio, Michele Marino, Michele Conti   +7 more
wiley   +1 more source

Air-Coupled, Contact, and Immersion Ultrasonic Non-Destructive Testing: Comparison for Bonding Quality Evaluation

Applied Sciences, 2020
The objective of this study is to compare the performance of different ultrasonic non-destructive testing (NDT) techniques for bonding quality evaluation.
Bengisu Yilmaz, Aadhik Asokkumar, Elena Jasiūnienė, Rymantas Jonas Kažys   +3 more
doaj   +1 more source

Experimental and numerical polar scans of several anisotropic materials using pulsed and harmonic ultrasonic beams [PDF]

, 2011
Ultrasonic non-destructive testing is a well known technique in present days, in which the C-scan is the most wide spread. Though, because of the inherent limitations of most methods to quantitatively characterize (damaged) composite materials, the quest
De Baere, Ives, Degrieck, Joris, Gu, Jun, Kersemans, Mathias, Sol, Hugo, Van Paepegem, Wim, Zastavnik, Filip   +6 more
core  

Color Routing and Beam Steering of Single‐Molecule Emission with a Spherical Silicon Nanoantenna

Advanced Functional Materials, EarlyView.
We experimentally demonstrate broadband directional emission from single molecules using a single spherical silicon nanoparticle assembled via DNA origami. By varying nanoparticle (NP) size and emitter position, we achieve unidirectional emission, beam steering, and color routing at the nanoscale, revealing modal interference as the underlying ...
María Sanz‐Paz, Nicole Siegel, Guillermo Serrera, Javier González‐Colsa, Fangjia Zhu, Karol Kołątaj, Minoru Fujii, Hiroshi Sugimoto, Pablo Albella, Guillermo P. Acuna   +9 more
wiley   +1 more source

Signal Enhancement Technology Based on Ultrasonic Guided Wave Rail Bottom Crack Detection

Chengshi guidao jiaotong yanjiu
［Objective］ During the propagation of guided waves in rails, there are problems of poor anti-interference ability and severe signal attenuation, which hinder the identification of rail bottom cracks.
HE Jiping, ZHOU Yongjiu, QIN Pei, ZHANG Yan, ZHOU Shouzhen, WANG Ping, ZHOU Wentao, LIU Yong   +7 more
doaj   +1 more source

Ultrasonic Guided Waves in Piezoelectric Layered Composite with Different Interfacial Properties

Advances in Materials Science and Engineering, 2011
Combining the propagation model of guided waves in a multilayered piezoelectric composite with the interfacial model of rigid, slip, and weak interfaces, the generalized dispersion characteristic equations of guided waves propagating in a piezoelectric ...
Xiao Chen
doaj   +1 more source

Nondestructive characterization of the elastic properties of orthotropic composites with ultrasound [PDF]

, 2011
Due to the increasing use of composite materials in critical applications demanding light weight to high strength ratio, reliable evaluation tools are necessary.
Degrieck, Joris, Gu, Jun, Kersemans, Mathias, Sol, Hugo, Van Paepegem, Wim, Zastavnik, Filip   +5 more
core  

On the scattering of longitudinal elastic waves from axisymmetric defects in coated pipes [PDF]

, 2013
This is the post-print version of the final paper published in Journal of Sound and Vibration. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural ...
Alleyne, Barshinger, Bartoli, Benmeddour, Carandente, Castaings, Castaings, Demma, Ditri, Engan, Gregory, Hayashi, Hayashi, Hua, Kirby, Kirby, Kirby, Kirby, Lawrie, Ma, Marzani, Peter Mudge, Predoi, Ray Kirby, Simonetti, Vogt, Zahari Zlatev, Zhou   +27 more
core   +2 more sources

Understanding the Role of Superhydrophobicity and Superhydrophilicity in Salt‐Spray Corrosion of Nanosecond Pulsed Laser‐Textured AA2024 Alloy

Advanced Functional Materials, EarlyView.
Nanosecond pulse laser texturing yields superhydrophobic and superhydrophilic AA2024 surfaces. Salt‐spray tests show that periodic superhydrophobic patterns suppress pitting, whereas superhydrophilic textures enhance it, linking laser‐induced morphology, wettability, and oxide chemistry to corrosion resistance.
Lis Geraldine Zschach, Robert Baumann, Eric Pohl, Angelika Wrzesińska‐Lashkova, Marcelo Sallese, Ignacio Tabares, Herman Heffner, Yana Vaynzof, Andrés Fabián Lasagni   +8 more
wiley   +1 more source

Shear horizontal (SH) ultrasound wave propagation around smooth corners [PDF]

, 2014
Shear horizontal (SH) ultrasound guided waves are being used in an increasing number of non-destructive testing (NDT) applications. One advantage SH waves have over some wave types, is their ability to propagate around curved surfaces with little energy ...
Burrows, S. E. (Susan E.), Dixon, Steve M., Petcher, P. A.   +2 more
core   +1 more source