Results 81 to 90 of about 514,588 (251)
MetalsCorrosion is one of the critical factors leading to the failure of steel structures. Ultrasonic C-scans are widely used to identify corrosion damage.
Dazhao Chi, Zhixian Xu, Haichun Liu
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Mechanical performance of composite bonded joints in the presence of localised process-induced zero-thickness defects [PDF]
, 2018 Processing parameters and environmental conditions can introduce variation into the performance of adhesively bonded joints. The effect of such variation on the mechanical performance of the joints is not well understood.
Addepalli, S. +4 more
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Non-contact ultrasonic detection of angled surface defects [PDF]
, 2011 Non-destructive testing is an important technique, and improvements are constantly needed. Surface defects in metals are not necessarily confined to orientations normal to the sample surface; however, much of the previous work investigating the ...
Clough, A. R. +3 more
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Scanning laser source and scanning laser detection techniques for different surface crack geometries [PDF]
, 2012 Standard test samples typically contain simulated defects such as slots machined normal to the surface. However, real defects will not always propagate in this manner; for example, rolling contact fatigue on rails propagates at around 25º to the surface,
Clough, A. R. +3 more
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Rapidly quantifying the relative distention of a human bladder [PDF]
, 1989 A device and method of rapidly quantifying the relative distention of the bladder in a human subject are disclosed. The ultrasonic transducer which is positioned on the subject in proximity to the bladder is excited by a pulser under the command of a ...
Blalock, Travis N. +4 more
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PLoS ONE, 2019 Compared to the conventional ultrasonic phased-array system, a large-element phased-array system employing the total focusing method (TFM) can yield improved image resolution and accuracy, providing more flexible scanning methods and image merging ...
Yuzhong Li, Wenming Tang, Guixiong Liu
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Defect Detection of Fiberglass Composite Laminates (FGCL) with Ultrasonic A-Scan Signal Measurement
IOP Conference Series: Materials Science and Engineering, 2016 Fiberglass composite laminates are widely used in many industries, due to its advantages of high specific strength and high specific modulus. Invisible defect such as delamination and inclusion may cause composite structural failure. Therefore, several research on ultrasonic testing for composite material defect detection have been done for the past ...
M. F. Mahmod +2 more
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Application of non destructive testing to the detection of aeronautical defects in composite structures [PDF]
, 2013 A study of two Non-destructive Testing methods (NDT) was carried out in specimens with different kinds of simulated defects. Ultrasonics test (US) and Infrared Thermography (IRT) were applied with the aim to evaluate the detectability and the accuracy of
Cantarel, Arthur +5 more
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Signal Separation in Ultrasonic Non-Destructive Testing
Acta Polytechnica, 2007 In ultrasonic non-destructive testing the signals characterizing the material structure are commonly evaluated. The sensitivity and resolution of ultrasonic systems is limited by the backscattering and electronic noise level commonly contained in the ...
V. Matz, M. Kreidl, R. Šmíd
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BMC Gastroenterology, 2019 Background Endoscopic ultrasound is useful for obtaining high-resolution images of pancreaticobiliary diseases, but is not readily available for physical checkups.
Daisuke Uchida +11 more
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