An acoustic emission source location method based on time reversal for glass fiber reinforced plastics plate

被引：0
|
作者：
Qi T. [1 ]
Chen Y. [1 ]
Li X. [2 ]
Lu C. [1 ]
Li Q. [1 ]
机构：
[1] Key Laboratory of Non-destructive Testing Technology, Nanchang Hangkong University, Nanchang
[2] State Key Lab of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2020年 / 41卷 / 06期
关键词：
Acoustic emission testing; Damage imaging; Fluctuation image reconstruction; Glass fiber reinforced plastics; Time reversal;
D O I：
10.19650/j.cnki.cjsi.J2006125
中图分类号：
学科分类号：
摘要：
Glass fiber reinforced plastics (GFRP) has been widely used in many industrial fields. However, there are still many problems to be solved in acoustic emission (AE) dynamic monitoring of the composites. A focusing enhancement technique with virtual loading based on time reversal theory is proposed for the strong anisotropy of GFRP, which can be applied to locate the sound source. First, the theoretical model of signal focusing enhancement technique in the process of virtual loading is derived according to the principle of time reversal. Then, the sensor array are arranged on GFRP, and the sound velocity is measured at different positions in the monitoring area for obtaining the material average sound velocity 2 432.32 m/s. Finally, the simulated AE signals collected in experiment are processed by the proposed model The vibration amplitude of each pixel in the monitoring area is calculated and fluctuation image is reconstructed. The position of the AE source is determined by the maximum amplitude. After threshold processing, the location of AE source can be seen intuitively from the figure. Compared with the existing AE instrument, experimental results show that this method has positioning accuracy within 4%, which can meet the requirements of engineering application. © 2020, Science Press. All right reserved.
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页码：208 / 217
页数：9
相关论文
共 36 条
  • [1] WANG C G, GE S Q, SUN M Y, Et al., Comparative study of vortex-induced vibration of FRP composite risers with large length to diameter ratio under different environmental situations, Applied Science, 9, (2019)
  • [2] BEDON C, LOUTER C., Numerical investigation on structural glass beams with GFRP-embedded rods including effects of pre-stress, Composite Structures, 184, pp. 650-661, (2018)
  • [3] LU M H, LIU M, ZHANG X S, Et al., Effect of void content on ultrasonic characteristic parameters of RTM glass fiber/epoxy composites, Acta Materiae Compositae Sinica, 35, 2, pp. 291-297, (2018)
  • [4] KIM K B, HSU D K, BARNARD D J., Estimation of porosity content of composite materials by applying discrete wavelet transform to ultrasonic back scattered signal, NDT & E International, 56, 11, pp. 10-16, (2013)
  • [5] HUANG ZH H, HUANG CH F, ZHAN J W, Et al., Acoustic emission technique for damage detection and failure process determination of fiber-reinforced polymer composites: An application review, Materials Review, 32, 7, pp. 1122-1128, (2018)
  • [6] TSAI S T, WANG L M, HUANG P P, Et al., Acoustic emission from breaking a bamboo chopstick, Physical Review Letters, 116, (2016)
  • [7] LONG X J, LI Q F, HE C H, Et al., Acoustic emission monitoring and evaluation of steel damage under the condition of different tensile velocity, Journal of Vibration and Shock, 36, 7, pp. 219-225, (2017)
  • [8] ZHANG Y, ZHOU Y Y, WANG B, Et al., Neural network monitoring of aluminum alloy spot welding crack based on acoustic emission signal, Journal of Mechanical Engineering, 52, 16, pp. 1-7, (2016)
  • [9] LUO Y, GUO Y, WU X, Et al., Envelope analysis scheme for inner race fault planetary bearing based on acoustic emission signal, Journal of Electronic Measurement and Instrumentation, 33, 5, pp. 164-170, (2019)
  • [10] HILL R, COWKING A, WSAN CARSWELL, Acoustic emission study of stress-corrosion in a chopped strand mat GFRP composite, Composites, 20, 3, pp. 215-232, (1989)
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