文献类型：期刊文献

中文题名：Crack Detection in Pipes with Different Bend Angles Based on Ultrasonic Guided Wave

英文题名：Crack Detection in Pipes with Different Bend Angles Based on Ultrasonic Guided Wave

作者：Qi, Minxin[1]; Chen, Shaojie[1]; Zhou, Shaoping[1]; Li, Yong[1]; Jia, Jiuhong[1]

机构：[1] Key Laboratory of Pressure Systems and Safety of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, China

年份：2017

卷号：34

期号：3

起止页码：318

中文期刊名：Transactions of Nanjing University of Aeronautics and Astronautics

外文期刊名：Transactions of Nanjing University of Aeronautics and Astronautics

收录：CSTPCD;;EI(收录号：20173304049042);Scopus;CSCD:【CSCD2017_2018】；

基金：supported by the National Natural Science Foundation of China(Nos.51575185,51175178)

语种：英文

中文关键词：guided straight indispensable Pipeline pipe defects waveform distinguished axial longitudinal

外文关键词：Pipelines - Crack detection - Losses - Finite element method - Ultrasonic applications

摘要：Pipeline plays an indispensable role in process industries,because the progressing crack-like defects of in it may result in serious accidents and significant economic losses.Therefore,it is essential to detect the cracks occurred in pipelines.The axial crack-like defects in elbows with different angle are inspected by using the T(0,1)mode guided waves,in which different configurations including 45°,90°,135°and 180°(straight pipe)are considered respectively.Firstly,the detection sensitivity for different defect location is experimentally investigated.After that,finite element simulation is used to explore the propagation behaviors of T(0,1)mode in different bend structures.Simulation and experiment results show that the crack in different areas of the elbow can affect the detection sensitivity.It can be found that the detection sensitivity of crack in the middle area of the elbow is higher compared to the extrados and intrados of the elbow.Finally,the mode conversion is also investigated when the T(0,1)crosses the bend,and the results show that bend is a key factor to the mode conversion phenomenon which presents between the T(0,1)mode and F(1,2)mode.
Pipeline plays an indispensable role in process industries, because the progressing crack-like defects of in it may result in serious accidents and significant economic losses. Therefore, it is essential to detect the cracks occurred in pipelines. The axial crack-like defects in elbows with different angle are inspected by using the T(0, 1) mode guided waves, in which different configurations including 45°, 90°, 135°and 180°(straight pipe) are considered respectively. Firstly, the detection sensitivity for different defect location is experimentally investigated. After that, finite element simulation is used to explore the propagation behaviors of T(0, 1) mode in different bend structures. Simulation and experiment results show that the crack in different areas of the elbow can affect the detection sensitivity. It can be found that the detection sensitivity of crack in the middle area of the elbow is higher compared to the extrados and intrados of the elbow. Finally, the mode conversion is also investigated when the T(0, 1) crosses the bend, and the results show that bend is a key factor to the mode conversion phenomenon which presents between the T(0, 1) mode and F(1, 2) mode. ? 2017, Editorial Department of Transactions of NUAA. All right reserved.