Results 41 to 50 of about 5,098 (179)

Ultrasonic Phased Array Imaging Approach Using Omni-Directional Velocity Correction for Quantitative Evaluation of Delamination in Composite Structure

Sensors, 2023
The ultrasonic detectability of buried defects within composite materials is dependent on the anisotropy of the composite material by which the propagation property of acoustic wave in each direction is variably affected.
Xiangting Xu, Zhichao Fan, Xuedong Chen, Jingwei Cheng, Yangguang Bu   +4 more
doaj   +1 more source

Adapting the full matrix capture and the total focusing method to laser ultrasonics for remote non destructive testing [PDF]

, 2017
Laser Induced Phased Arrays (LIPAs) use post processing to focus and steer the laser generated and detected ultrasonic beam, synthesizing a phased array.
Clark, Matt, Stratoudaki, Theodosia, Wilcox, Paul D.   +2 more
core   +1 more source

Full matrix capture and the total focusing imaging algorithm using laser induced ultrasonic phased arrays [PDF]

, 2016
Laser ultrasonics is a technique where lasers are used for the generation and detection of ultrasound instead of conventional piezoelectric transducers.
Clark, Matt, Stratoudaki, Theodosia, Wilcox, Paul D.   +2 more
core   +3 more sources

Towards an Alternative to Time of Flight Diffraction Using Instantaneous Phase Coherence Imaging for Characterization of Crack-Like Defects

Sensors, 2021
Time of flight diffraction (TOFD) is considered a reliable non-destructive testing method for the inspection of welds using a pair of single-element probes.
Baptiste Gauthier, Guillaume Painchaud-April, Alain Le Duff, Pierre Bélanger   +3 more
doaj   +1 more source

Theoretical assessment of different ultrasonic configurations for defects detection in composite components [PDF]

, 2017
It is well known that structures’ safety is crucial and of great importance. Part of their maintenance procedure is structural inspection, which is currently performed with the aid of Non Destructive Testing techniques, aiming to detect structural ...
Asfis, Georgios, Avdelidis, Nicolas, Cheilakou, Eleni, Kappatos, Vassilios, Salonitis, Konstantinos, Theodorakeas, Panagiotis, Tzitzilonis, Vasileios   +6 more
core   +2 more sources

Ultrasonic Array Imaging of Nuclear Austenitic V-Shape Welds with Inhomogeneous and Unknown Anisotropic Properties

Applied Sciences, 2021
The quality of ultrasound images of welds is highly penalized by the dendritic structure of the material that forms during cooling. The image of a flaw is all the more degraded as a reliable description of such a medium is most of the time not possible ...
Corentin Menard, Sébastien Robert, Dominique Lesselier   +2 more
doaj   +1 more source

Recovery of Polyphenols from Brewer’s Spent Grains [PDF]

, 2019
peer-reviewedThe recovery of antioxidant polyphenols from light, dark and mix brewer’s spent grain (BSG) using conventional maceration, microwave and ultrasound assisted extraction was investigated.
Birsan, Rares, Rai, Dilip K., Waldron, Keith, Wilde, Peter   +3 more
core   +2 more sources

Optimal Design of Sparse Array for Ultrasonic Total Focusing Method by Binary Particle Swarm Optimization

IEEE Access, 2020
Ultrasonic phased array technology is used in various fields. Traditional full phased arrays place elements in every position of a uniform lattice with half-wavelength spacing between the lattice points, so the hardware cost is very high.
Han Zhang, Bichao Bai, Jianfeng Zheng, Yun Zhou   +3 more
doaj   +1 more source

Laser induced ultrasonic phased array using Full Matrix Capture data acquisition and Total Focusing Method [PDF]

, 2015
Laser based ultrasound is a technique where a short pulsed laser is used to generate ultrasound and optical interferometry is used in order to detect the signal.
Clark, Matt, Stratoudaki, Theodosia, Wilcox, Paul   +2 more
core   +4 more sources

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

Advanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He, Minxian Zhang, Jinqiang Zhang, Hongqi Sun, Shaobin Wang, Xiaoguang Duan   +5 more
wiley   +1 more source