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2001 IEEE Ultrasonics Symposium. Proceedings. An International Symposium (Cat. No.01CH37263), 2002
Ferrocement is a plane composite material made with cement mortar and steel mesh. This paper describes the use of dynamic testing such as resonance, phase velocity and ultrasound on ferrocement for thickness measurements, elastic and viscoelastic evaluation.
E. Moreno, M. Castillo
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Ferrocement is a plane composite material made with cement mortar and steel mesh. This paper describes the use of dynamic testing such as resonance, phase velocity and ultrasound on ferrocement for thickness measurements, elastic and viscoelastic evaluation.
E. Moreno, M. Castillo
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A comparison of wavelet deconvolution techniques for ultrasonic NDT
ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing, 2003Wavelet deconvolution is a problem of fundamental importance in many signal processing applications. The authors are concerned with deconvolution to extract impulse responses of materials tested in ultrasonic nondestructive testing (NDT). The impulse responses can provide vital information about the flaws and material properties.
C. H. Chen, Wei-Lien Hsu, Sam-Kit Sin
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Physics Bulletin, 1983
In the present social and political climate there are ever increasing needs to ensure structural integrity in such areas as the nuclear and aerospace industries and in North Sea structure fabrication. There are great economic advantages for a company or organisation that can reliably detect and characterise defects, both in new products and during in ...
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In the present social and political climate there are ever increasing needs to ensure structural integrity in such areas as the nuclear and aerospace industries and in North Sea structure fabrication. There are great economic advantages for a company or organisation that can reliably detect and characterise defects, both in new products and during in ...
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GAS-JET ULTRASONIC GENERATORS FOR NDT
Nondestructive Testing and Evaluation, 2001Abstract Operating principles. design and main parameters of gas-jet generators of broadbandultrasonic signals for NDT problems have been presented. Extension of the band of generated frequencies is achieved with frequency modulation. addition of partial amplitude- frequency characteristics and parametric non-linear interaction of ultrasonic ...
A. G. MITIN, Y.G. EFIMOV
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Dynamic ultrasonic scanning as an NDT tool
NDT International, 1986Abstract Two ultrasonic NDT scanning systems are described which, by utilizing the flight time of sound pulses, give real-time, two-dimensional representations of the flaws occurring in sheet or sheet-like ( eg pipes) materials. One system, the sector scan, shows all the faults lying beneath each point in the surface while the other, the tomographic
M.J. Crook, M.J. Poole, D.H. Saunderson
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Automated Interpretation for Ultrasonic NDT Data
1999Classification and sizing of suspect indications within ultrasonic data can be a complex, time consuming task. An expert system [1], modelled on NDT interpreters’ knowledge and method of inference, has been designed to perform automated classification and sizing of indications extracted from 3D ultrasonic images.
Leggat, P., Reilly, D., McNab, A.
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Research on nonlinear ultrasonic NDT of microcracks
2010 IEEE International Conference on Mechatronics and Automation, 2010Microcracks inside metallic materials seriously influence the mechanic properties of materials and can endanger machine operations. The nonlinear acoustic features, such as harmonics will appear with ultrasound through a damaged material. Based on the relationship between the harmonics, a method using nonlinear acoustic harmonic amplitude ratio to ...
Yi Dun +3 more
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Ultrasonic NDT of steel: Effect of the grain size on the ultrasonic propagation and attenuation [PDF]
, 2018 Non-destructive techniques (NDT), such as Ultrasound Testing (UT), have been industrially exploited for decades within the material field, for a wide range of possibilities. Ultrasonic non-destructive evaluation relies on exciting the sample under test with an ultrasonic beam and on measuring the beam reflected, transmitted or scattered from ...
Bonifazi, Francesco +6 more
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A small 2D ultrasonic array for NDT applications
NDT & E International, 2003Peer ...
Martínez-Graullera, Óscar +3 more
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Laser Ultrasonics : A Non Contacting NDT System
1995Ultrasound is today one of the commonest nondestructive methods in industry, in particular for the inspection of composites in the aerospace industry. Piezoelectric transducers are generally used to emit and receive the ultrasound, but have a number of disadvantages, both in use on a production line and for the inspection of complex parts.
Pétillon, O. +4 more
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