Elastic Wave Mechanics in Damaged Metallic Plates
Human health monitoring (HHM) is essential for continued daily task execution, as is structural health monitoring (SHM) for structures to ensure the continual performance of their designed tasks with optimal efficiency. The existence of damage in a structure affects its optimal use through stiffness...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Symmetry |
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| Online Access: | https://www.mdpi.com/2073-8994/15/11/1989 |
| _version_ | 1797457657786793984 |
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| author | Samuel Chukwuemeka Olisa Muhammad A. Khan Andrew Starr |
| author_facet | Samuel Chukwuemeka Olisa Muhammad A. Khan Andrew Starr |
| author_sort | Samuel Chukwuemeka Olisa |
| collection | DOAJ |
| description | Human health monitoring (HHM) is essential for continued daily task execution, as is structural health monitoring (SHM) for structures to ensure the continual performance of their designed tasks with optimal efficiency. The existence of damage in a structure affects its optimal use through stiffness deterioration. Damage of different forms could occur in a structure but have the singular objective of material degradation, leading to its underuse for a task. Guided wave ultrasonics has shown strength in detecting sundry damage in structures, but most of the damage monitored and detected is unfilled with substances. However, some damage could trap and accumulate substances that could hasten material degradation through corrosion activities under favorable conditions, especially in the oil and gas industry. This study used the ultrasonic-guided waves’ pitch–catch inspection technique to identify damage filled with different materials. The assessment was based on the RMSD of the dominant Lamb wave mode’s average maximum amplitude and the response signals’ transmission coefficient (<i>TC</i>). A five-cycle tone burst of excitation signals of different frequencies was created to generate propagating Lamb waves in the structure. The fundamental antisymmetric mode was found to be more sensitive than the fundamental symmetric mode when detecting damage filled with various substances. At 80 kHz, the deviation of the current response signals from the baseline response signals due to different filled substances in the damage was distinct and decreased with increased fluid viscosity. Given that structures in the oil and gas sector are particularly susceptible to substance-induced damage, the outcomes of this study are paramount. |
| first_indexed | 2024-03-09T16:25:11Z |
| format | Article |
| id | doaj.art-078026778ef94e8ba653aa9ceaad9329 |
| institution | Directory Open Access Journal |
| issn | 2073-8994 |
| language | English |
| last_indexed | 2024-03-09T16:25:11Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Symmetry |
| spelling | doaj.art-078026778ef94e8ba653aa9ceaad93292023-11-24T15:08:40ZengMDPI AGSymmetry2073-89942023-10-011511198910.3390/sym15111989Elastic Wave Mechanics in Damaged Metallic PlatesSamuel Chukwuemeka Olisa0Muhammad A. Khan1Andrew Starr2Centre of Life-Cycle Engineering and Management, Cranfield University, Cranfield MK43 0AL, UKCentre of Life-Cycle Engineering and Management, Cranfield University, Cranfield MK43 0AL, UKCentre of Life-Cycle Engineering and Management, Cranfield University, Cranfield MK43 0AL, UKHuman health monitoring (HHM) is essential for continued daily task execution, as is structural health monitoring (SHM) for structures to ensure the continual performance of their designed tasks with optimal efficiency. The existence of damage in a structure affects its optimal use through stiffness deterioration. Damage of different forms could occur in a structure but have the singular objective of material degradation, leading to its underuse for a task. Guided wave ultrasonics has shown strength in detecting sundry damage in structures, but most of the damage monitored and detected is unfilled with substances. However, some damage could trap and accumulate substances that could hasten material degradation through corrosion activities under favorable conditions, especially in the oil and gas industry. This study used the ultrasonic-guided waves’ pitch–catch inspection technique to identify damage filled with different materials. The assessment was based on the RMSD of the dominant Lamb wave mode’s average maximum amplitude and the response signals’ transmission coefficient (<i>TC</i>). A five-cycle tone burst of excitation signals of different frequencies was created to generate propagating Lamb waves in the structure. The fundamental antisymmetric mode was found to be more sensitive than the fundamental symmetric mode when detecting damage filled with various substances. At 80 kHz, the deviation of the current response signals from the baseline response signals due to different filled substances in the damage was distinct and decreased with increased fluid viscosity. Given that structures in the oil and gas sector are particularly susceptible to substance-induced damage, the outcomes of this study are paramount.https://www.mdpi.com/2073-8994/15/11/1989debris-filled damageultrasonicsdamagestructural health monitoring (SHM)RMSDtransmission coefficient (<i>TC</i>) |
| spellingShingle | Samuel Chukwuemeka Olisa Muhammad A. Khan Andrew Starr Elastic Wave Mechanics in Damaged Metallic Plates Symmetry debris-filled damage ultrasonics damage structural health monitoring (SHM) RMSD transmission coefficient (<i>TC</i>) |
| title | Elastic Wave Mechanics in Damaged Metallic Plates |
| title_full | Elastic Wave Mechanics in Damaged Metallic Plates |
| title_fullStr | Elastic Wave Mechanics in Damaged Metallic Plates |
| title_full_unstemmed | Elastic Wave Mechanics in Damaged Metallic Plates |
| title_short | Elastic Wave Mechanics in Damaged Metallic Plates |
| title_sort | elastic wave mechanics in damaged metallic plates |
| topic | debris-filled damage ultrasonics damage structural health monitoring (SHM) RMSD transmission coefficient (<i>TC</i>) |
| url | https://www.mdpi.com/2073-8994/15/11/1989 |
| work_keys_str_mv | AT samuelchukwuemekaolisa elasticwavemechanicsindamagedmetallicplates AT muhammadakhan elasticwavemechanicsindamagedmetallicplates AT andrewstarr elasticwavemechanicsindamagedmetallicplates |