Journal ArticleDOI
Calculated signal amplitudes for ultrasonic Time-of-Flight diffraction signals for tilted or skewed cracks
TLDR
In this paper, the authors derived the signal amplitudes expected with Time-of-Flight Diffraction (TODF) for tilted or skewed cracks for elliptical and strip-like defects of through-wall extent between 15 and 25 mm and at depths from the inspection surface of between 100 and 225 mm.About:
This article is published in International Journal of Pressure Vessels and Piping.The article was published on 1987-01-01. It has received 4 citations till now. The article focuses on the topics: Signal & Time-of-flight diffraction ultrasonics.read more
Citations
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Journal ArticleDOI
Non-destructive testing and evaluation for structural integrity
TL;DR: A brief description of the physical concepts of NDE methods and the physical/derived parameters that are used for assessing defects, stresses and microstructures are given in this paper, where a few case studies highlighting the importance of non-destructive testing and evaluation for structural integrity assessment are also discussed based on the investigations carried out at the authors' laboratory.
Journal ArticleDOI
The use of elastic wave-material structure interaction theories in NDE modeling
TL;DR: In this article, the authors define nondestructive evaluation (NDE) as the determination of the serviceability of a component on the basis of non-destructive measurements, including the measurement process, the interpretation of the data in terms of the structure of the component, the prediction of serviceability based on this structure, and the decision whether to accept or reject the part.
Book ChapterDOI
Diffraction coefficients for flat-bottomed holes from 3-D finite difference calculations
TL;DR: In this article, the authors use the ratio of the signal from a crack-like defect to the signal of a reference reflector as one factor which determines whether the flaw merits reporting, further sizing, and, possibly, removal.
Book ChapterDOI
The Rôle of Ultrasonic Diffraction in NDT
TL;DR: Diffraction is now an accepted ultrasonic phenomenon used in the detection, sizing and characterisation of flaws in solids as mentioned in this paper, which has led to improved accuracy in flaw sizing and greater reliability in flaw location.
References
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Journal ArticleDOI
Diffraction of elastic waves by cracks: application to time-of-flight inspection
J.A. Ogilvy,J.A.G. Temple +1 more
TL;DR: In this article, the angular variation of diffracted signal amplitude when infinite plane P or SV waves are incident on a semi-infinite crack is derived for the case of a defect symmetrically placed with respect to transmitter and receiver.
Journal Article
The UKAEA defect detection trials on test-pieces 3 and 4
Journal ArticleDOI
The amplitude of ultrasonic time-of-flight diffraction signals compared with those from a reference reflector
TL;DR: In this paper, the amplitude of signals diffracted by the edges of the defect are calculated and compared with those from a 3 mm diameter, flat-bottomed, reference reflector hole.