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Finite Element Simulation of Ultrasonic Scattering by Rough Flaws with Multi-Scale Distortions
The roughness of a flaw’s surface significantly affects the scattering behavior of ultrasonic waves. It is vital to understand the impact of roughness on flaw echoes, especially when performing ultrasonic nondestructive inspection on safety-critical components. However, the current approach for crea...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9735789/ https://www.ncbi.nlm.nih.gov/pubmed/36500129 http://dx.doi.org/10.3390/ma15238633 |
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author | Wang, Zheng Zeng, Zhanhong Song, Yongfeng Li, Xiongbing |
author_facet | Wang, Zheng Zeng, Zhanhong Song, Yongfeng Li, Xiongbing |
author_sort | Wang, Zheng |
collection | PubMed |
description | The roughness of a flaw’s surface significantly affects the scattering behavior of ultrasonic waves. It is vital to understand the impact of roughness on flaw echoes, especially when performing ultrasonic nondestructive inspection on safety-critical components. However, the current approach for creating rough flaw models fails to reconstruct complicated cracks with secondary cracks. Here, a multi-scale distortion method is developed to generate a rough flaw by using an optical microscope image of a real flaw. The finite element (FE) is then implemented to simulate the near-surface rough flaws in nickel-based bars, which are detected by an offsetting immersion transducer with mode-converted transverse waves. Numerical results show that the randomness and complexity of flaw echoes from rough flaws are exceptionally high. The gap between the maximum and minimum normalized amplitude values of flaw echoes from a rough crack with secondary cracks can reach 7.125 dB. Meanwhile, the maximum time of flight (TOF) is almost twice as large as the minimum TOF. Therefore, the present method can generate effective rough flaw models in terms of macroscopic rough geometry and microscopic rough surface. Moreover, the impact of the rough flaw surface on the flaw echoes goes beyond amplitude changes and may make flaw location challenging. |
format | Online Article Text |
id | pubmed-9735789 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-97357892022-12-11 Finite Element Simulation of Ultrasonic Scattering by Rough Flaws with Multi-Scale Distortions Wang, Zheng Zeng, Zhanhong Song, Yongfeng Li, Xiongbing Materials (Basel) Article The roughness of a flaw’s surface significantly affects the scattering behavior of ultrasonic waves. It is vital to understand the impact of roughness on flaw echoes, especially when performing ultrasonic nondestructive inspection on safety-critical components. However, the current approach for creating rough flaw models fails to reconstruct complicated cracks with secondary cracks. Here, a multi-scale distortion method is developed to generate a rough flaw by using an optical microscope image of a real flaw. The finite element (FE) is then implemented to simulate the near-surface rough flaws in nickel-based bars, which are detected by an offsetting immersion transducer with mode-converted transverse waves. Numerical results show that the randomness and complexity of flaw echoes from rough flaws are exceptionally high. The gap between the maximum and minimum normalized amplitude values of flaw echoes from a rough crack with secondary cracks can reach 7.125 dB. Meanwhile, the maximum time of flight (TOF) is almost twice as large as the minimum TOF. Therefore, the present method can generate effective rough flaw models in terms of macroscopic rough geometry and microscopic rough surface. Moreover, the impact of the rough flaw surface on the flaw echoes goes beyond amplitude changes and may make flaw location challenging. MDPI 2022-12-03 /pmc/articles/PMC9735789/ /pubmed/36500129 http://dx.doi.org/10.3390/ma15238633 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Wang, Zheng Zeng, Zhanhong Song, Yongfeng Li, Xiongbing Finite Element Simulation of Ultrasonic Scattering by Rough Flaws with Multi-Scale Distortions |
title | Finite Element Simulation of Ultrasonic Scattering by Rough Flaws with Multi-Scale Distortions |
title_full | Finite Element Simulation of Ultrasonic Scattering by Rough Flaws with Multi-Scale Distortions |
title_fullStr | Finite Element Simulation of Ultrasonic Scattering by Rough Flaws with Multi-Scale Distortions |
title_full_unstemmed | Finite Element Simulation of Ultrasonic Scattering by Rough Flaws with Multi-Scale Distortions |
title_short | Finite Element Simulation of Ultrasonic Scattering by Rough Flaws with Multi-Scale Distortions |
title_sort | finite element simulation of ultrasonic scattering by rough flaws with multi-scale distortions |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9735789/ https://www.ncbi.nlm.nih.gov/pubmed/36500129 http://dx.doi.org/10.3390/ma15238633 |
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