Results 11 to 20 of about 8,799 (301)
Numerical Investigation of Excitation of Various Lamb Waves Modes in Thin Plastic Films
Applied Sciences, 2022 Ultrasonic-guided waves are widely used for the non-destructive testing and material characterization of plates and thin films. In the case of thin plastic polyvinyl chloride (PVC), films up to 3.2 MHz with only two Lamb wave modes, antisymmetrical A0 ...
Rymantas Jonas Kazys +2 more
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Shock and Vibration, 2022 In mining engineering, the in situ stress changes with the stress induced by the surrounding mining activities. It positively or negatively affects the propagation of ultrasonic guided waves in rockbolts.
Shuisheng Yu, Leilei Niu, Jin Chen
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Ultrasonic guided wave detection of U-shaped pipeline [PDF]
MATEC Web of Conferences, 2020 The guided waves in the elbow was analyzed using semi- analytical finite element method, which was used to calculate the dispersion curves, along with the vibration deformation and energy flow density distribution of the elbow cross-section.
Zhu Longxiang +3 more
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Applied Sciences, 2020 The objective of this study is to compare the performance of different ultrasonic non-destructive testing (NDT) techniques for bonding quality evaluation.
Bengisu Yilmaz +3 more
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A Feasibility Study for a Nonlinear Guided Wave Mixing Technique
Applied Sciences, 2021 Ultrasonic non-destructive testing is an effective means of examining objects without destroying them. Among such testing, ultrasonic nonlinear evaluation is used to detect micro-damage, such as corrosion or plastic deformation.
Junpil Park, Jeongseok Choi, Jaesun Lee
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Predicting bone strength with ultrasonic guided waves [PDF]
Scientific Reports, 2017 AbstractRecent bone quantitative ultrasound approaches exploit the multimode waveguide response of long bones for assessing properties such as cortical thickness and stiffness. Clinical applications remain, however, challenging, as the impact of soft tissue on guided waves characteristics is not fully understood yet. In particular, it must be clarified
Bochud, Nicolas +3 more
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Temperature Effects on Nonlinear Ultrasonic Guided Waves
Materials, 2023 Nonlinear ultrasonic guided waves have attracted increasing attention in the field of structural health monitoring due to their high sensitivity and long detection distance. In practical applications, the temperature of the tested structure will inevitably change, so it is essential to evaluate the effects of temperature on nonlinear ultrasonic guided ...
Xiaochuan Niu +4 more
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Experimental and numerical evaluation on debonding of fully grouted rockbolt under pull-out loading
International Journal of Coal Science & Technology, 2022 The axial loading in rockbolts changes due to stress redistribution and rheology in the country rock mass. Such a change may lead to debonding at rockbolt to grout interface or rupture of the rockbolt.
Shuisheng Yu, Wancheng Zhu, Leilei Niu
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Ultrasonic guided waves in elliptical annular cylinders [PDF]
The Journal of the Acoustical Society of America, 2015 This paper studies the influence of cross-section ovalness or ellipticity on lower order axisymmetric guided wave modes in thin pipes. The second longitudinal mode L(0,2) and the fundamental torsional mode T(0,1) are studied, as these are of interest to current pipe inspection.
Prabhu, Rajagopal +1 more
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Large Area Detection of Microstructural Defects with Multi-Mode Ultrasonic Signals
Applied Sciences, 2022 Cyclic loading or other stresses can lead to development of cracks and crack growth in mechanical structures, leading to eventual failure. While ultrasound imaging can be used for non-destructive testing of such structures, conventional ultrasound ...
Taeho Ju, Alp T. Findikoglu
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