Detection of damage in welded joints using high order feature guided ultrasonic waves
Topographical features such as welds, stiffeners, and bends in plate-like structures have been identified as special local waveguides, which are able to render ultrasonic wave energy preferentially guided along themselves. Such feature guided waves (FGW) at low frequencies have been reported in the...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/151296 |
| _version_ | 1811680500562001920 |
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| author | Yu, Xudong Zuo, Peng Xiao, Jing Fan, Zheng |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Yu, Xudong Zuo, Peng Xiao, Jing Fan, Zheng |
| author_sort | Yu, Xudong |
| collection | NTU |
| description | Topographical features such as welds, stiffeners, and bends in plate-like structures have been identified as special local waveguides, which are able to render ultrasonic wave energy preferentially guided along themselves. Such feature guided waves (FGW) at low frequencies have been reported in the literature as an effective screening tool for long-range features, which, however, can only detect relatively large defects. In this study, the existence of high order FGW modes, categorized into multiple wave families, are revealed via the modal analysis of an unbounded welded plate at high frequencies, by using the semi-analytical finite element (SAFE) approach. These FGWs exhibit strong mode confinement in specific regions of the weld, which can potentially offer enhanced interrogation of the localized area in long welds and provide improved detection sensitivity to small defects. A series of high order shear horizontal (SH) type weld-guided modes are investigated in both three-dimensional finite element (3D FE) simulations and experiments, for detecting axial and transverse cracks of sub-wavelength size in the weld bead. A new superposition technique is proposed to coherently enhance the amplitude of the selected mode in a multi-modal waveform, leading to an attractive single-mode inspection capability at high frequencies. Both small cracks are identified numerically and experimentally in the superposed reflection of the -like weld-guided wave, and results are in close agreement. The feasibility of using high order weld-guided modes for inspecting small defects inside the weld has been demonstrated. |
| first_indexed | 2024-10-01T03:26:02Z |
| format | Journal Article |
| id | ntu-10356/151296 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:26:02Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1512962021-07-02T04:03:59Z Detection of damage in welded joints using high order feature guided ultrasonic waves Yu, Xudong Zuo, Peng Xiao, Jing Fan, Zheng School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Guided Ultrasonic Waves Feature Guiding Effect Topographical features such as welds, stiffeners, and bends in plate-like structures have been identified as special local waveguides, which are able to render ultrasonic wave energy preferentially guided along themselves. Such feature guided waves (FGW) at low frequencies have been reported in the literature as an effective screening tool for long-range features, which, however, can only detect relatively large defects. In this study, the existence of high order FGW modes, categorized into multiple wave families, are revealed via the modal analysis of an unbounded welded plate at high frequencies, by using the semi-analytical finite element (SAFE) approach. These FGWs exhibit strong mode confinement in specific regions of the weld, which can potentially offer enhanced interrogation of the localized area in long welds and provide improved detection sensitivity to small defects. A series of high order shear horizontal (SH) type weld-guided modes are investigated in both three-dimensional finite element (3D FE) simulations and experiments, for detecting axial and transverse cracks of sub-wavelength size in the weld bead. A new superposition technique is proposed to coherently enhance the amplitude of the selected mode in a multi-modal waveform, leading to an attractive single-mode inspection capability at high frequencies. Both small cracks are identified numerically and experimentally in the superposed reflection of the -like weld-guided wave, and results are in close agreement. The feasibility of using high order weld-guided modes for inspecting small defects inside the weld has been demonstrated. Singapore Maritime Institute (SMI) This work was supported by the Singapore Maritime Institute under SMI Simulation and Modelling R&D Programme. The authors are grateful to Professor Michael Lowe from Imperial College London for helpful discussions. Additionally, the authors would like to thank Keppel Singmarine for provision of the welded plates. 2021-07-02T04:03:59Z 2021-07-02T04:03:59Z 2019 Journal Article Yu, X., Zuo, P., Xiao, J. & Fan, Z. (2019). Detection of damage in welded joints using high order feature guided ultrasonic waves. Mechanical Systems and Signal Processing, 126, 176-192. https://dx.doi.org/10.1016/j.ymssp.2019.02.026 0888-3270 0000-0003-3091-106X 0000-0002-7818-153X https://hdl.handle.net/10356/151296 10.1016/j.ymssp.2019.02.026 2-s2.0-85061778734 126 176 192 en Mechanical Systems and Signal Processing © 2019 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Guided Ultrasonic Waves Feature Guiding Effect Yu, Xudong Zuo, Peng Xiao, Jing Fan, Zheng Detection of damage in welded joints using high order feature guided ultrasonic waves |
| title | Detection of damage in welded joints using high order feature guided ultrasonic waves |
| title_full | Detection of damage in welded joints using high order feature guided ultrasonic waves |
| title_fullStr | Detection of damage in welded joints using high order feature guided ultrasonic waves |
| title_full_unstemmed | Detection of damage in welded joints using high order feature guided ultrasonic waves |
| title_short | Detection of damage in welded joints using high order feature guided ultrasonic waves |
| title_sort | detection of damage in welded joints using high order feature guided ultrasonic waves |
| topic | Engineering::Mechanical engineering Guided Ultrasonic Waves Feature Guiding Effect |
| url | https://hdl.handle.net/10356/151296 |
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