A Microcrack Location Method Based on Nonlinear S0 Mode Lamb Wave and Probability Scan Positioning Imaging Matrix
| Autor: | Xiaobo Rui, Yibo Li, Shuo Zhang, Chang Ma, Zi Yang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
microcrack
Computer science Acoustics 02 engineering and technology 01 natural sciences Signal lcsh:Technology Hilbert–Huang transform lcsh:Chemistry Lamb waves 0203 mechanical engineering Interference (communication) 0103 physical sciences EMD General Materials Science 010301 acoustics Instrumentation lcsh:QH301-705.5 Fluid Flow and Transfer Processes Signal processing Noise (signal processing) lcsh:T Process Chemistry and Technology General Engineering Mode (statistics) probability scan positioning matrix single-mode (S0) lamb wave lcsh:QC1-999 Computer Science Applications Nonlinear system 020303 mechanical engineering & transports lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 lcsh:Engineering (General). Civil engineering (General) lcsh:Physics |
| Zdroj: | Applied Sciences, Vol 9, Iss 9, p 1874 (2019) Applied Sciences Volume 9 Issue 9 |
| ISSN: | 2076-3417 |
| Popis: | Early damage, such as microcrack, occupies most of the fatigue life of materials, and timely detection of early damage and positioning has great engineering and economic value. In this paper, a matrix scanning and positioning imaging method based on a probabilistic algorithm is proposed. Cooperating with the single-mode (S0) lamb wave, the microcrack in the thin plate material can be efficiently positioned. Taking the S0 mode lamb wave as the fundamental wave can effectively reduce the influence of the dispersion effect on the signal analysis. Meanwhile, in order to reduce the noise interference, the signal is reconstructed by empirical mode decomposition (EMD) to achieve the filtering effect. Then, the ABAQUS finite element simulation software is used to compare the positioning results under different locations of microcrack and different arrangements of probe. Finally, the feasibility of the localization algorithm is verified by the RAM-5000 SNAP nonlinear ultrasound system. The experimental results are consistent with the simulation theory, and the microcrack is effectively positioned. This facilitates our timely remedial action or further assessment of the remaining value of the material. |
| Databáze: | OpenAIRE |
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