Shape reconstruction of mixed type void flaws using Born inversion method |
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| Authors: | Zheng Gangfeng Wu Bin He Cunfu |
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| Affiliation: | 1. College of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China;2. College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100022, China |
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| Abstract: | We study an approximate technique for determining the shapes of mixed type void flaws in elastic media from knowledge of the ultrasonic scattering amplitudes. It is well known that the technique is highly effective under weak scattering conditions. In the paper, two cement paste cylindrical specimens with mixed type void flaws are prepared and ultrasonic measurements are carried out by experimental means. The measurement area is restricted in the plane perpendicular to the axis of cylindrical specimen. The measured wave data are fed into the approximate technique formula—the Born inversion method and cross-sectional image is obtained. We find that good results have been obtained for strong scattering void flaws such as mixed type void flaws in cement paste cylindrical specimens. |
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| Keywords: | Shape reconstruction Inversion method Born approximation Strong scattering |
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