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中国科学引文数据库核心期刊
国际刊号:ISSN 1005-1120
国内刊号:CN 32-1389/V
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  • 主管:工业和信息化部
  • 主办:南京航空航天大学
  • 国际刊号:ISSN 1005-1120
  • 国内刊号:CN 32-1389/V
  • 地址:南京市御道街29号
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Qi Minxin, Chen Shaojie, Zhou Shaoping*, Li Yong, Jia Jiuhong.Crack Detection in Pipes with Different Bend Angles Based on Ultrasonic Guided Wave[J].南京航空航天大学学报英文版,2017,34(3):318-325
Crack Detection in Pipes with Different Bend Angles Based on Ultrasonic Guided Wave
  
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中文关键词:  
英文关键词:axial crack like defect; T(0, 1) guided wave; different angle elbows; mode conversion
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Qi Minxin, Chen Shaojie, Zhou Shaoping*, Li Yong, Jia Jiuhong 1.Jiangsu Province Key Laboratory of Aerospace Power System, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R.China 
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英文摘要:
      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.
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