Results 11 to 20 of about 5,231 (255)

Adapting the Time-Domain Synthetic Aperture Focusing Technique (T-SAFT) to Laser Ultrasonics for Imaging the Subsurface Defects. [PDF]

Sensors (Basel), 2023
Traditional ultrasonic testing uses a single probe or phased array probe to investigate and visualize defects by adapting certain imaging algorithms. The time-domain synthetic aperture focusing technique (T-SAFT) is an imaging algorithm that employs a ...
Karuppasamy SS, Yang CH.
europepmc   +2 more sources

Nonlinear Ultrasonic Imaging for Porosity Evaluation. [PDF]

Sensors (Basel), 2023
The influence of porosity on the mechanical behaviour of composite laminates represents a complex problem that involves many variables. Therefore, the evaluation of the type and volume content of porosity in a composite specimen is important for quality ...
De Simone ME, Boccardi S, Fierro GPM, Meo M.   +3 more
europepmc   +2 more sources

Fast, Accurate, and Reliable Detection of Damage in Aircraft Composites by Advanced Synergistic Infrared Thermography and Phased Array Techniques

Applied Sciences, 2021
This paper presents an advanced methodology for the detection of damage in aircraft composite materials based on the sensor fusion of two image-based non-destructive evaluation techniques.
Janardhan Padiyar M., Luca Zanotti Fragonara, Ivan Petrunin, Joao Raposo, Antonios Tsourdos, Iain Gray, Spyridoyla Farmaki, Dimitrios Exarchos, Theodore E. Matikas, Konstantinos G. Dassios   +9 more
doaj   +1 more source

Near-surface defect detection in additively manufactured components using laser induced phased arrays with surface acoustic wave crosstalk suppression

Materials & Design, 2023
In-process inspection of the additive manufacturing process requires a technique that can provide reliable measurements given the extreme operating environments, the small size of the defects and the cyclic melting and heating of the material, caused by ...
Geo Davis, Theodosia Stratoudaki, Peter Lukacs, Matthew W. Riding, Ahmed Al Fuwaires, Panagiotis Kamintzis, Don Pieris, Alan Keenan, Paul Wilcox, Gareth Pierce, Charles MacLeod, Stewart Williams   +11 more
doaj   +1 more source

Phased array inspection of glass fiber reinforced polymers pipeline joints

Journal of Materials Research and Technology, 2019
Glass Fiber Reinforced Polymers (GFRP) laminated joints combine properties such as high mechanical resistance, low specific weight and high corrosion resistance, features that allow their application in harsh environments.
Priscila Duarte de Almeida, Gabriela Ribeiro Pereira   +1 more
doaj   +1 more source

Investigating the influence of the constituent materials on the performance of periodic piezoelectric composite arrays [PDF]

, 2007
This paper describes a theoretical investigation into the influence of the constituent materials on periodic composite array transducer performance. A finite element (FE) model, configured in PZFlex, is used to analyze the performance of a wedge coupled ...
Gachagan, A., Harvey, G., Mackersie, J.W., O'Leary, R.L.   +3 more
core   +1 more source

Phased Array Beamforming Methods for Powering Biomedical Ultrasonic Implants

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2022
Millimeter-scale implants using ultrasound for power and communication have been proposed for a range of deep-tissue applications, including neural recording and stimulation. However, published implementations have shown high sensitivity to misalignment with the external ultrasound transducer.
Braeden C. Benedict, Mohammad Meraj Ghanbari, Rikky Muller   +2 more
openaire   +3 more sources

A Robust Approach to Optimal Matched Filter Design in Ultrasonic Non-Destructive Evaluation (NDE) [PDF]

, 2016
The matched filter was demonstrated to be a powerful yet efficient technique to enhance defect detection and imaging in ultrasonic non-destructive evaluation (NDE) of coarse grain materials, provided that the filter was properly designed and optimized ...
Hayward, Gordon, Li, Minghui
core   +3 more sources

Performance of periodic piezoelectric composite arrays incorporating a passive phase exhibiting anisotropic properties [PDF]

, 2005
This paper explores the minimisation of interelement cross talk in 1-D and 2-D periodic composite array structures through the incorporation of a passive phase exhibiting anisotropic elastic properties.
Hayward, G., O'Leary, R.L., Parr, A.C.S., Pethrick, R.A., Troge, A.   +4 more
core   +1 more source

Strategies for data acquisition using ultrasonic phased arrays [PDF]

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2018
Ultrasonic phased arrays have produced major benefits in a range of fields, from medical imaging to non-destructive evaluation. The maximum information, which can be measured by an array, corresponds to the Full Matrix Capture (FMC) data acquisition technique and contains all possible combinations of transmitter–receiver signals.
A. Velichko, A. J. Croxford
openaire   +4 more sources