Theoretical and experimental research on controlling guided waves propagation direction in pipes

2011 ◽  
Author(s):  
Wang Yuemin ◽  
Shen Lihua ◽  
Shen Chuanjun ◽  
Sun Fengrui
Keyword(s):  
Experimental Research ◽  
Guided Waves ◽  
Propagation Direction ◽  
Waves Propagation

Analysis of Detection Quality for Ultrasonic Guided Wave With L(0,2) and T(0,1) in the Pressure Pipe

2019 ◽  
Author(s):  
Shu-Hong Liu ◽  
Ju Ding ◽  
Chen-huai Tang ◽  
Pan Song ◽  
Deng-chao Tang ◽  
...  
Keyword(s):  
Guided Waves ◽  
Longitudinal Mode ◽  
Guided Wave ◽  
Propagation Direction ◽  
Wave Propagation Direction ◽  
Detection Ability ◽  
Torsion Mode ◽  
Pressure Pipe ◽  
Ultrasonic Guided Wave ◽  
Detection Quality

Abstract Torsion mode and longitudinal mode are used primarily in ultrasonic guided wave inspection, especially L (0, 2) mode and T (0, 1) mode. There are some differences between them, like excitation method, mode of particle vibration, inspection ability and impact factor. So, it is very important to select the appropriate mode between L (0,2) and T(0,1). In this paper, the detection ability of two guided wave modes are compared and analyzed with regard to four aspects in the pipe: fluid, liquid level, defects, the angle between defect and wave propagation direction. The experimental results show that L (0,2) mode is more suitable for defect detection in pressure pipe than T (0,1) mode, but L (0,2) mode is more sensitive to fluid in a pipe. This paper provides a basis for selecting the mode of guided waves in ultrasonic detection.

scholarly journals Peculiarities of the surface and guided waves propagation in heterogeneous composites with nematic coatings

PAMM ◽  
2010 ◽  
Vol 10 (1) ◽  
pp. 501-502
Author(s):  
Dmitry Zakharov ◽  
Alexandr Kaptsov
Keyword(s):  
Guided Waves ◽  
Waves Propagation

Investigation on ultrasonic guided waves propagation in elbow pipe

2016 ◽  
Vol 139-140 ◽  
pp. 250-255 ◽  
Author(s):  
Minxin Qi ◽  
Shaoping Zhou ◽  
Jing Ni ◽  
Yong Li
Keyword(s):  
Guided Waves ◽  
Ultrasonic Guided Waves ◽  
Waves Propagation

A Numerical Approach for the Investigation of Guided-Waves Propagation Mechanisms in Reinforced Polymers through a DoE Analysis

2019 ◽  
Vol 957 ◽  
pp. 329-339
Author(s):  
A. de Luca ◽  
Donato Perfetto ◽  
Francesco Caputo
Keyword(s):  
Material Properties ◽  
Composite Structures ◽  
Guided Waves ◽  
Lamb Waves ◽  
Numerical Models ◽  
Detection Sensitivity ◽  
Fe Model ◽  
Structural Health ◽  
Waves Propagation ◽  
Local Material Properties

Thanks to their high damage detection sensitivity and low requested power consumption, guided-waves (Lamb waves) have been increasingly used in the last years to monitor the structural integrity in primary and secondary composite structures. The monitoring of the structural health through the propagation of Lamb waves in composite structures is notoriously complex and, for this reason, the development of a prediction model can be a helpful tool for the improvement of Structural Health Monitoring (SHM) systems. Finite Element Method (FE) appears to be the best candidate for such type of simulation. However, since Lamb waves propagation depends strictly on the local material properties of the medium they propagate through, their numerical characterization is a thorny phase. Real composite components are usually affected by the presence of a large number of voids and defects, which cannot be reproduced in numerical models; this leads to a variability of the mechanical properties of materials, with particular reference to elastic moduli and density. These aspects get really ambitious the development of a well-established FE model. In this paper, a design of experiment (DOE) has been carried out to numerically investigate on the effects of the material properties variability on guided-waves time of flight.

Guided waves propagation in multi-layered porous materials by the global matrix method and Biot theory

2021 ◽  
Vol 184 ◽  
pp. 108356
Author(s):  
Gao Jie ◽  
Lyu Yan ◽  
Zheng Mingfang ◽  
Liu Mingkun ◽  
Liu Hongye ◽  
...  
Keyword(s):  
Porous Materials ◽  
Matrix Method ◽  
Guided Waves ◽  
Biot Theory ◽  
Waves Propagation
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