Results 61 to 70 of about 134 (123)

Principles and Applications of Ultrasonic-Based Nondestructive Methods for Self-Healing in Cementitious Materials. [PDF]

Materials (Basel), 2017
Ahn E, Kim H, Sim SH, Shin SW, Shin M.
europepmc   +1 more source

Non-destructive evaluation of depth of surface cracks using ultrasonic frequency analysis. [PDF]

Sensors (Basel), 2014
Her SC, Lin ST.
europepmc   +1 more source

Full-Matrix Imaging in Fourier Domain towards Ultrasonic Inspection with Wide-Angle Oblique Incidence for Welded Structures. [PDF]

Sensors (Basel)
Chen M, Xu X, Yang K, Wu H.
europepmc   +1 more source

Surface-Wave Based Model for Estimation of Discontinuity Depth in Concrete. [PDF]

Sensors (Basel), 2018
Ahn E, Kim H, Sim SH, Shin SW, Popovics JS, Shin M.   +5 more
europepmc   +1 more source

Advancements in integrated robotic sensing: A European perspective. [PDF]

Open Res Eur
Mineo C.
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A metrological approach to the time of flight diffraction method (ToFD)

Measurement, 2021
Abstract Introduction Non-Destructive Testing (NDT) is widely used in industry, especially in the evaluation of mechanical parts and structures for identifying defects, corrosion, flaws or imperfections. Time of flight diffraction (ToFD) is a method to assess discontinuities high within a workpiece or material, what is not easy to do with ...
R.C. Mayworm, A.V. Alvarenga, R.P.B. Costa-Felix   +2 more
openaire   +1 more source

Shear-wave time of flight diffraction (S-TOFD) technique

NDT & E International, 2006
Ultrasonic time of flight diffraction (TOFD) for sizing defects is based on the time of flight of the diffracted echo that is generated when a longitudinal wave is incident on a crack tip. This technique has the limitation during near-surface inspection due to signal superposition.
G. Baskaran, Krishnan Balasubramaniam, C. Lakshmana Rao   +2 more
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An alternative Ultrasonic Time of Flight Diffraction (TOFD) method

NDT & E International, 2018
Abstract In this work an alternative TOFD method is presented, capable to detect and size defects in the inspected material with good precision. It was shown that the diffraction used in this technique is the most relevant signal among the longitudinal backwall and the shear backwall echoes, compared to other TOFD methods.
F.W.T. Yeh, T. Lukomski, J. Haag, T. Clarke, T. Stepinski, T.R. Strohaecker   +5 more
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Reduction of Layered Dead Zone in Time-of-Flight Diffraction (TOFD) for Pipeline with Spectrum Analysis Method

Journal of Nondestructive Evaluation, 2021
When ultrasonic time-of-flight diffraction (TOFD) B-scan is implemented along the circumferential direction of pipeline, the ray path of direct longitudinal wave (DLW) is not parallel to the curved pipeline surface, inducing the layered dead zone.
S. J. Jin, B. Zhang, X. Sun, L. Lin
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Inspection Using Shear Wave Time of Flight Diffraction (S-TOFD) Technique

AIP Conference Proceedings, 2006
Ultrasonic Time of Flight Diffraction (TOFD) for sizing defects is based on the time of flight of the longitudinal diffracted echo(es) that is (arc) generated when a longitudinal wave is incident on a crack tip. TOFD technique so far has been commonly applied for the inspection of thick sections (>15 mm) and thickness below 5 mm from the scanning ...
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