Modal Analysis of Specific Composite Sandwich Structures
Composite sandwich structures are gaining attention due to their inherent properties, such as lightweight, low density, and high strength. The forced vibration response of these structures was studied experimentally to investigate the effects of external loads on these structures. In this work, four...
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| Format: | Article |
| Language: | English |
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Unviversity of Technology- Iraq
2023-01-01
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| Series: | Engineering and Technology Journal |
| Subjects: | |
| Online Access: | https://etj.uotechnology.edu.iq/article_175566_a6895f2089dc75e761f049ab7cae7f85.pdf |
| _version_ | 1797337702803177472 |
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| author | Mustafa Al-Khazraji Sadeq Bakhy Muhsin Jweeg |
| author_facet | Mustafa Al-Khazraji Sadeq Bakhy Muhsin Jweeg |
| author_sort | Mustafa Al-Khazraji |
| collection | DOAJ |
| description | Composite sandwich structures are gaining attention due to their inherent properties, such as lightweight, low density, and high strength. The forced vibration response of these structures was studied experimentally to investigate the effects of external loads on these structures. In this work, four composite sandwich structures were manufactured using carbon fiber, glass fibers, and foam and tested on a specially designed vibration test rig by hitting the specimen with an impact hammer. The response was recorded by an accelerometer attached to the specimens. The accelerometer signal was amplified, and the input and output signals were transferred to LABVIEW via a data acquisition card and were processed in MATLAB. The impact hammer acts as an external excitation source, and the frequency response function was found for each specimen under various edge boundary conditions. Bode plots were plotted for each test, and the peak frequency and the phase difference were compared. It was found that composite sandwich specimens made of carbon fiber skins and carbon fiber honeycomb core showed a higher frequency response among all specimens (400 Hz). Furthermore, it was found that the foam core layer reduces the phase difference between the input and output signals from (360degrees) to (180degrees) compared with other honeycomb cores. Therefore, the procedure outlined in this research can be applied to other structures to investigate their vibration response. In addition, this work could be beneficial for the diagnosis of structure stability using a forced vibration response procedure. |
| first_indexed | 2024-03-08T09:17:26Z |
| format | Article |
| id | doaj.art-b7755ad39e1442c6af401518b97af7a3 |
| institution | Directory Open Access Journal |
| issn | 1681-6900 2412-0758 |
| language | English |
| last_indexed | 2024-03-08T09:17:26Z |
| publishDate | 2023-01-01 |
| publisher | Unviversity of Technology- Iraq |
| record_format | Article |
| series | Engineering and Technology Journal |
| spelling | doaj.art-b7755ad39e1442c6af401518b97af7a32024-01-31T14:15:47ZengUnviversity of Technology- IraqEngineering and Technology Journal1681-69002412-07582023-01-01411132210.30684/etj.2022.133585.1195175566Modal Analysis of Specific Composite Sandwich StructuresMustafa Al-Khazraji0Sadeq Bakhy1Muhsin Jweeg2Mechanical Engineering Dept., College of Engineering., Al-Nahrain University - IraqDepartment of Mechanical Engineering, University of Technology, Baghdad, IraqAl-Farahidi University, Baghdad, IraqComposite sandwich structures are gaining attention due to their inherent properties, such as lightweight, low density, and high strength. The forced vibration response of these structures was studied experimentally to investigate the effects of external loads on these structures. In this work, four composite sandwich structures were manufactured using carbon fiber, glass fibers, and foam and tested on a specially designed vibration test rig by hitting the specimen with an impact hammer. The response was recorded by an accelerometer attached to the specimens. The accelerometer signal was amplified, and the input and output signals were transferred to LABVIEW via a data acquisition card and were processed in MATLAB. The impact hammer acts as an external excitation source, and the frequency response function was found for each specimen under various edge boundary conditions. Bode plots were plotted for each test, and the peak frequency and the phase difference were compared. It was found that composite sandwich specimens made of carbon fiber skins and carbon fiber honeycomb core showed a higher frequency response among all specimens (400 Hz). Furthermore, it was found that the foam core layer reduces the phase difference between the input and output signals from (360degrees) to (180degrees) compared with other honeycomb cores. Therefore, the procedure outlined in this research can be applied to other structures to investigate their vibration response. In addition, this work could be beneficial for the diagnosis of structure stability using a forced vibration response procedure.https://etj.uotechnology.edu.iq/article_175566_a6895f2089dc75e761f049ab7cae7f85.pdfcomposite sandwichsandwich manufacturingforced vibrationmodal analysisfrequency response function |
| spellingShingle | Mustafa Al-Khazraji Sadeq Bakhy Muhsin Jweeg Modal Analysis of Specific Composite Sandwich Structures Engineering and Technology Journal composite sandwich sandwich manufacturing forced vibration modal analysis frequency response function |
| title | Modal Analysis of Specific Composite Sandwich Structures |
| title_full | Modal Analysis of Specific Composite Sandwich Structures |
| title_fullStr | Modal Analysis of Specific Composite Sandwich Structures |
| title_full_unstemmed | Modal Analysis of Specific Composite Sandwich Structures |
| title_short | Modal Analysis of Specific Composite Sandwich Structures |
| title_sort | modal analysis of specific composite sandwich structures |
| topic | composite sandwich sandwich manufacturing forced vibration modal analysis frequency response function |
| url | https://etj.uotechnology.edu.iq/article_175566_a6895f2089dc75e761f049ab7cae7f85.pdf |
| work_keys_str_mv | AT mustafaalkhazraji modalanalysisofspecificcompositesandwichstructures AT sadeqbakhy modalanalysisofspecificcompositesandwichstructures AT muhsinjweeg modalanalysisofspecificcompositesandwichstructures |