Modal Analysis of Specific Composite Sandwich Structures
Engineering and Technology Journal,
2023, Volume 41, Issue 1, Pages 13-22
AbstractComposite 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.
- Honeycomb composite core was manufactured using the corrugated method.
- A new vibration test rig design was proposed.
- Forced vibration tests were performed on the manufactured specimens.
- All-carbon fiber showed the highest frequency response among all specimens.
- Honeycomb cores have higher damping compared with foam cores.
 S. E. Sadiq, M. J. Jweeg, and S. H. Bakhy, “Strength Analysis of an Aircraft Sandwich Structure with a Honeycomb Core: Theoretical and Experimental Approaches,” Engineering and Technology Journal., 39 (2021) 153–166. doi: 10.30684/etj.v39i1A.1722.
 E. K. Njim, S. H. Bakhy, and M. Al-Waily, “Analytical and Numerical Investigation of Free Vibration Behavior for Sandwich Plate with Functionally Graded Porous Metal Core,” Pertanika J Sci Technol., 29 (2021). doi: 10.47836/pjst.29.3.39.
 B. G. Compton and J. A. Lewis, “3D-printing of lightweight cellular composites,” Advanced Materials., 26 (2014) 5930–5935. doi: 10.1002/adma.201401804.
 A. Stocchi, L. Colabella, A. Cisilino, and V. Álvarez, “Manufacturing and testing of a sandwich panel honeycomb core reinforced with natural-fiber fabrics,” Mater Des., 55 (2014) 394–403. doi: 10.1016/j.matdes.2013.09.054.
 X. Wei, D. Li, and J. Xiong, “Fabrication and mechanical behaviors of an all-composite sandwich structure with a hexagon honeycomb core based on the tailor-folding approach,” Compos Sci Technol., 184 (2019). doi: 10.1016/j.compscitech.2019.107878.
 K. Sugiyama, R. Matsuzaki, M. Ueda, A. Todoroki, and Y. Hirano, “3D printing of composite sandwich structures using continuous carbon fiber and fiber tension,” Compos Part A Appl Sci Manuf., 113 (2018) 114–121. doi: 10.1016/j.compositesa.2018.07.029.
 S. E. Sadiq, M. J. Jweeg, and S. H. Bakhy, “The Effects of Honeycomb Parameters on Transient Response of an Aircraft Sandwich Panel Structure,” IOP Conf Ser Mater Sci Eng., 928 (2020) 022126. doi: 10.1088/1757-899X/928/2/022126.
 M. S. Al-Khazraji, M. J. Jweeg, and S. H. Bakhy, “Free vibration analysis of a laminated honeycomb sandwich panel: a suggested analytical solution and a numerical validation,” Journal of Engineering, Design and Technology., (2022). doi: 10.1108/JEDT-10-2021-0536.
 S. E. Sadiq, S. Bakhy, and M. Jweeg, “Optimum vibration characteristics for honey comb sandwich panel used in aircraft structure,” Journal of Engineering Science and Technology, 16 (2021) 1463–1479.
 E. Carrera and S. Brischetto, “A survey with numerical assessment of classical and refined theories for the analysis of sandwich plates,” Applied Mechanics Reviews., 62 (2009) 1–17. doi: 10.1115/1.3013824.
 Y. Li and W. Yao, “Double‐mode modeling of nonlinear flexural vibration analysis for a symmetric rectangular honeycomb sandwich thin panel by the homotopy analysis method,” Math Methods Appl Sci., 44 (2021) 7–26. doi: 10.1002/mma.6703.
 D. A. Maturi, A. J. M. Ferreira, A. M. Zenkour, and D. S. Mashat, “Analysis of sandwich plates with a new layerwise formulation,” Compos B Eng., 56 (2014) 484–489. doi: 10.1016/j.compositesb.2013.08.086.
 A. Mahi, E. A. Adda Bedia, and A. Tounsi, “A new hyperbolic shear deformation theory for bending and free vibration analysis of isotropic, functionally graded, sandwich and laminated composite plates,” Appl Math Model., 39 (2015) 2489–2508. doi: 10.1016/j.apm.2014.10.045.
 P. Praveen A, V. Rajamohan, A. B. Arumugam, and A. T. Mathew, “Vibration analysis of a multifunctional hybrid composite honeycomb sandwich plate,” Journal of Sandwich Structures and Materials., 22 (2020) 2818–2860. doi: 10.1177/1099636218820764.
 M. J. Jweeg, S. H. Bakhy, and S. E. Sadiq, “Effects of Core Height, Cell Angle and Face Thickness on Vibration Behavior of Aircraft Sandwich Structure with Honeycomb Core: An Experimental and Numerical Investigations,” Materials Science Forum., 1039 (2021) 65–85. doi: 10.4028/www.scientific.net/MSF.1039.65.
 S. Brischetto and E. Carrera, “Analysis of nano-reinforced layered plates via classical and refined two-dimensional theories,” Multidiscipline Modeling in Materials and Structures., 8 (2012) 4–31. doi: 10.1108/15736101211235958.
 J. N. Reddy and T. Kuppusamy, “Natural vibrations of laminated anisotropic plates,” J Sound Vib., 94 (1984) 63–69. doi: 10.1016/S0022-460X(84)80005-X.
 M. K. Rao, K. Scherbatiuk, Y. M. Desai, and A. H. Shah, “Natural Vibrations of Laminated and Sandwich Plates,” J Eng Mech., 130 (2004) 1268–1278. doi: 10.1061/(asce)0733-9399(2004)130:11(1268).
 H. Zhang, D. Shi, and Q. Wang, “An improved Fourier series solution for free vibration analysis of the moderately thick laminated composite rectangular plate with non-uniform boundary conditions.,” Int J Mech Sci, 121 (2017) 1–20. doi: 10.1016/j.ijmecsci.2016.12.007.
 M. K. Rao and Y. M. Desai, “Analytical solutions for vibrations of laminated and sandwich plates using mixed theory,” Compos Struct., 63 (2004) 361–373. doi: 10.1016/S0263-8223(03)00185-5.
 A. K. Noor, W. S. Burton, and C. W. Bert, “Computational Models for Sandwich Panels and Shells,” Appl Mech Rev., 49 (1996) 155–199. doi: 10.1115/1.3101923.
 K. Jegorova, R. Herrmann, and M. Vihtonen, “Composite Honeycomb Cores.,” (2014).
- Article View: 62
- PDF Download: 54