Highly accurate online characterisation of cracks in plate-like structures
In this paper, an in situ technique for the localisation and the sizing of cracks in plate-like structures is presented. The excitation and the reception of the ultrasonic diagnostic signal – Lamb waves – are achieved by permanently installed piezoelectric ceramic disks. The technique simplifies the...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/140156 |
| _version_ | 1811691961625608192 |
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| author | Zou, Fangxin Rao, Jing Aliabadi, Mohammad Hossein |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Zou, Fangxin Rao, Jing Aliabadi, Mohammad Hossein |
| author_sort | Zou, Fangxin |
| collection | NTU |
| description | In this paper, an in situ technique for the localisation and the sizing of cracks in plate-like structures is presented. The excitation and the reception of the ultrasonic diagnostic signal – Lamb waves – are achieved by permanently installed piezoelectric ceramic disks. The technique simplifies the underdetermined problem of the full characterisation of cracks to an over-determined problem of the localisation of crack tips. Also, it overcomes the difficulties associated with using the pitch-catch excitation scheme for crack characterisation. The development of the technique was done systematically using analytic models and the finite element method. The technique has been validated by an experiment and assessed by extensive parametric studies. While it was designed to be a convenient approach, highly accurate crack characterisation has been attained as evident through the results of both numerical studies and physical experiments. |
| first_indexed | 2024-10-01T06:28:13Z |
| format | Journal Article |
| id | ntu-10356/140156 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:28:13Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1401562020-05-27T02:57:01Z Highly accurate online characterisation of cracks in plate-like structures Zou, Fangxin Rao, Jing Aliabadi, Mohammad Hossein School of Mechanical and Aerospace Engineering Engineering::Aeronautical engineering Non-destructive Evaluation Structural Health Monitoring In this paper, an in situ technique for the localisation and the sizing of cracks in plate-like structures is presented. The excitation and the reception of the ultrasonic diagnostic signal – Lamb waves – are achieved by permanently installed piezoelectric ceramic disks. The technique simplifies the underdetermined problem of the full characterisation of cracks to an over-determined problem of the localisation of crack tips. Also, it overcomes the difficulties associated with using the pitch-catch excitation scheme for crack characterisation. The development of the technique was done systematically using analytic models and the finite element method. The technique has been validated by an experiment and assessed by extensive parametric studies. While it was designed to be a convenient approach, highly accurate crack characterisation has been attained as evident through the results of both numerical studies and physical experiments. 2020-05-27T02:57:01Z 2020-05-27T02:57:01Z 2017 Journal Article Zou, F., Rao, J., & Aliabadi, M. H. (2018). Highly accurate online characterisation of cracks in plate-like structures. NDT and E International, 94, 1-12. doi:10.1016/j.ndteint.2017.11.002 0963-8695 https://hdl.handle.net/10356/140156 10.1016/j.ndteint.2017.11.002 2-s2.0-85033589176 94 1 12 en NDT and E International © 2017 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Aeronautical engineering Non-destructive Evaluation Structural Health Monitoring Zou, Fangxin Rao, Jing Aliabadi, Mohammad Hossein Highly accurate online characterisation of cracks in plate-like structures |
| title | Highly accurate online characterisation of cracks in plate-like structures |
| title_full | Highly accurate online characterisation of cracks in plate-like structures |
| title_fullStr | Highly accurate online characterisation of cracks in plate-like structures |
| title_full_unstemmed | Highly accurate online characterisation of cracks in plate-like structures |
| title_short | Highly accurate online characterisation of cracks in plate-like structures |
| title_sort | highly accurate online characterisation of cracks in plate like structures |
| topic | Engineering::Aeronautical engineering Non-destructive Evaluation Structural Health Monitoring |
| url | https://hdl.handle.net/10356/140156 |
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