Characterization of three-dimensional surface-breaking slots based on regression analysis of ultrasonic Rayleigh wave simulations
Rayleigh waves travel along the surface of a solid structure, with most of their energy focusing within a depth of one wavelength. Thus, the reflection coefficient from a surface-breaking crack is highly sensitive to the ratio between the crack depth and the wavelength. It is possible to characteriz...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Online Access: | https://hdl.handle.net/10356/177946 |
| _version_ | 1811691402480844800 |
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| author | Zhang, Shengyuan Fan, Zheng |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Zhang, Shengyuan Fan, Zheng |
| author_sort | Zhang, Shengyuan |
| collection | NTU |
| description | Rayleigh waves travel along the surface of a solid structure, with most of their energy focusing within a depth of one wavelength. Thus, the reflection coefficient from a surface-breaking crack is highly sensitive to the ratio between the crack depth and the wavelength. It is possible to characterize the depth of surface-breaking cracks by measuring the features in the reflected waves. However, a feature value can correspond to multiple depth-wavelength ratios, i.e., the mapping is non-univalent, which brings difficulties for crack sizing using the feature. In this work, we use finite element method (FEM) software to perform 3-D numerical analysis on the interaction between Rayleigh waves and surface-breaking slots with various 3-D geometries. Multiple features are selected based on the nearest neighbour regression analysis on a numerical dataset, ensuring that a univalent mapping relationship from the selected features to the slot depth can be established. This relationship is then experimentally used to predict the depth of real slots with different geometries, showing reasonable accuracy. |
| first_indexed | 2024-10-01T06:19:19Z |
| format | Journal Article |
| id | ntu-10356/177946 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:19:19Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1779462024-06-03T06:30:20Z Characterization of three-dimensional surface-breaking slots based on regression analysis of ultrasonic Rayleigh wave simulations Zhang, Shengyuan Fan, Zheng School of Mechanical and Aerospace Engineering Engineering Rayleigh waves Surface-breaking crack Rayleigh waves travel along the surface of a solid structure, with most of their energy focusing within a depth of one wavelength. Thus, the reflection coefficient from a surface-breaking crack is highly sensitive to the ratio between the crack depth and the wavelength. It is possible to characterize the depth of surface-breaking cracks by measuring the features in the reflected waves. However, a feature value can correspond to multiple depth-wavelength ratios, i.e., the mapping is non-univalent, which brings difficulties for crack sizing using the feature. In this work, we use finite element method (FEM) software to perform 3-D numerical analysis on the interaction between Rayleigh waves and surface-breaking slots with various 3-D geometries. Multiple features are selected based on the nearest neighbour regression analysis on a numerical dataset, ensuring that a univalent mapping relationship from the selected features to the slot depth can be established. This relationship is then experimentally used to predict the depth of real slots with different geometries, showing reasonable accuracy. Agency for Science, Technology and Research (A*STAR) This work was supported by A*STAR Science and Engineering Research Council, Singapore (grant No. SERC A19F1a0104). 2024-06-03T06:30:20Z 2024-06-03T06:30:20Z 2024 Journal Article Zhang, S. & Fan, Z. (2024). Characterization of three-dimensional surface-breaking slots based on regression analysis of ultrasonic Rayleigh wave simulations. Ultrasonics, 138, 107261-. https://dx.doi.org/10.1016/j.ultras.2024.107261 0041-624X https://hdl.handle.net/10356/177946 10.1016/j.ultras.2024.107261 38350313 2-s2.0-85184812564 138 107261 en SERC A19F1a0104 Ultrasonics © 2024 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering Rayleigh waves Surface-breaking crack Zhang, Shengyuan Fan, Zheng Characterization of three-dimensional surface-breaking slots based on regression analysis of ultrasonic Rayleigh wave simulations |
| title | Characterization of three-dimensional surface-breaking slots based on regression analysis of ultrasonic Rayleigh wave simulations |
| title_full | Characterization of three-dimensional surface-breaking slots based on regression analysis of ultrasonic Rayleigh wave simulations |
| title_fullStr | Characterization of three-dimensional surface-breaking slots based on regression analysis of ultrasonic Rayleigh wave simulations |
| title_full_unstemmed | Characterization of three-dimensional surface-breaking slots based on regression analysis of ultrasonic Rayleigh wave simulations |
| title_short | Characterization of three-dimensional surface-breaking slots based on regression analysis of ultrasonic Rayleigh wave simulations |
| title_sort | characterization of three dimensional surface breaking slots based on regression analysis of ultrasonic rayleigh wave simulations |
| topic | Engineering Rayleigh waves Surface-breaking crack |
| url | https://hdl.handle.net/10356/177946 |
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