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Title |
A Basic Study on the Varying Thickness Detection of Steel Plate Using Ultrasonic Velocity Method
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Authors |
김우석(WooSeok Kim) ; 문성모(Seongmo Mun) ; 김철민(Chulmin Kim) ; 임석빈(Seokbeen Im) |
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DOI |
https://doi.org/10.11112/jksmi.2020.24.6.146 |
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Keywords |
초음파; 부식; 점검; 연속 스캐닝 Ultrasonic; Corrosion; Inspection; Continuous Scanning |
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Abstract |
This study was initiated to develop an effective inspection method to detect defects such as corrosion in closed-cell steel members in steel-box girder bridges. The ultrasonic velocity method among various non-destructive method was selected as a rapid and effective method to derive the average propagation velocity in the medium by using the ultrasonic wave velocity method for specimens of different thickness. The regression analysis was performed based on the experimental results, and the results was interpolated to evaluate the prediction accuracy. If the material properties are identical, this ultrasonic velocity method can predict the thickness using the averaged transmitted velocity. In addition, a continuous scanning method moving at 200 mm/s was tested for scanning a wide area of a bridge. The results exhibited that the continuous scanning method was able to effectively scan the different thickness of a bridge.
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