Results 21 to 30 of about 252 (152)
e-Journal of Nondestructive Testing, 2023 The non-intrusive inspection (NII) of pressure vessels using external in-service ultrasonic NDT has multiple advantages compared to internal visual inspection, including the significant reduction of down-time related costs and safety benefits from ...
Helen Peramatzis, Steve Burch
doaj +1 more source
Alleviated WRF Summer Wet Bias Over the Tibetan Plateau Using a New Cloud Macrophysics Scheme
Journal of Advances in Modeling Earth Systems, Volume 15, Issue 10, October 2023., 2023 Abstract Reliable precipitation simulation over the Tibetan Plateau (TP) remains a challenge, manifested by a prominent systematic wet bias in the warm season. Previous studies have generally neglected the potential linkage between surface radiation energy budget and precipitation bias.
Dingchi Zhao +7 more
wiley +1 more source
Chinese Journal of Mechanical Engineering, 2022 The shallow subsurface defects are difficult to be identified and quantified by ultrasonic time-of-flight diffraction (TOFD) due to the low resolution induced by pulse width and beam spreading.
Xu Sun, Li Lin, Shijie Jin
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Quarterly Journal of the Royal Meteorological Society, Volume 149, Issue 755, Page 2527-2549, July 2023 Part B., 2023 Abbreviations: LES, large‐eddy simulation; NWP, numerical weather prediction; SRTM, Shuttle Radar Topography Mission data; TOFD, turbulent orographic form drag. Abstract This paper presents a turbulent orographic form drag (TOFD) parameterization scheme that takes into account the directional effects stemming from the angle between the low‐level wind ...
Haile Xue, Xueshun Shen
wiley +1 more source
Ultrasonic signal acquisition system for TOFD imaging
IOP Conference Series: Materials Science and Engineering, 2020 Abstract This article describes the development of an application to capture and process ultrasonic signals that will lead to the formation of flight time diffraction images, TOFD. In this way the theoretical basis of operation of this technique is presented establishing concepts such as type A and type D scanning.
J Casagua, J Rodríguez, D Segura
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Research progress in ultrasonic testing for friction stir welding of aluminum alloy
Cailiao gongcheng, 2022 The defects in friction stir welding (FSW) of aluminum alloy, e.g., tunnel defect, lack of penetration (LOP) and kissing bond, are with complex shape and narrow gap by inappropriate welding parameters.
JIN Shijie, TIAN Xin, LIN Li
doaj +1 more source
Recent modelling advances for ultrasonic TOFD inspections
AIP Conference Proceedings, 2015 The ultrasonic TOFD (Time of Flight Diffraction) Technique is commonly used to detect and characterize disoriented cracks using their edge diffraction echoes. An overview of the models integrated in the CIVA software platform and devoted to TOFD simulation is presented.
Darmon, Michel +4 more
openaire +2 more sources
Materials & Design, 2021 Automated in-process Non-Destructive Testing (NDT) systems are rapidly gaining traction within the manufacturing industry as they reduce manufacturing time and costs.
Ehsan Mohseni +12 more
doaj +1 more source
Nondestructive Examination for Weld Joint using TOFD Technique
Yosetsu Gakkai Shi/Journal of the Japan Welding Society, 2012 Morihiro FUKUSHIMA +2 more
exaly +3 more sources
Quarterly Journal of the Royal Meteorological Society, Volume 152, Issue 778, July 2026 Part A.A theory for the interaction between a boundary layer and a low mountain is used to provide estimates of the turbulent orographic form drag, upward‐propagating mountain gravity‐wave drag, and trapped lee‐wave drag (case shown in the figure). After reviewing briefly how these processes are represented in weather and climate models, we propose a ...
Francois Lott +2 more
wiley +1 more source