Dynamic Analysis of Composite Doubly Curved Panels with Variable Thickness
Dynamic analysis of composite doubly curved panels with variable thickness subjected to different pulse types using Generalized Differential Quadrature method (GDQ) is presented in this study. Panels with variable thickness are used in the construction of aerospace and marine industry. Giving variable thickness to panels can allow the designer to get optimum structural efficiency. For this reason, estimating the response of variable thickness panels is very important to design more reliable structures under dynamic loads. Dynamic equations for composite panels with variable thickness are obtained using virtual work principle. Partial derivatives in the equation of motion are expressed with GDQ and Newmark average acceleration scheme is used for temporal discretization. Several examples are used to highlight the effectiveness of the proposed method. Results are compared with finite element method. Effects of taper ratios, boundary conditions and loading type on the response of composite panel are investigated.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1131918Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 625
 R. Ganesan, “Compressive response of tapered composite shells,” Composite Structures, vol. 93, pp. 2153-62, 2011.
 A. S. Ashour, “A Semi - Analytical Solution of the Flexural Vibration of Orthotropic Plates of Variable Thickness,” Journal of Sound and Vibration, vol. 240, pp. 431-45, 2001.
 G. J. Turvey, “A Study of the Behavior of Square Plates at Large Deflections According to the Theories of Foeppl and Von Karman,” Journal of Strain Analysis for Engineering Desig, vol. 13, pp. 11-16, 1978.
 S. Javed, K. K. Viswanahtan, Z. A. Aziz, K. Prabakar “Free vibration of anti-symmetric angle-ply plates with variable thickness,” vol. 137, pp. 56-69, 2009.
 C. W. Bert, M. Malik “Free Vibration Analysis of Tapered Rectangular Plates By Differential Quadrature Method-A Semi-Analytical Approach,” Journal of Sound and Vibration vol. 190, pp. 41-63, 1996.
 B. A. Ananda, S. P. Edwin, V. Rajamohan “Dynamic characterization of thickness tapered laminated composite plates,” Journal of Vibration and Control pp. 1-21, 2015.
 H. Kobayashi, K. Sonoda “Buckling of Rectangular Plates with Tapered Thickness,” Journal of Structural Engineering vol. 116, pp. 1278-89, 1990.
 Ö. Civalek “Fundamental frequency of isotropic and orthotropic rectangular plates with linearly varying thickness by discrete singular convolution method,” Applied Mathematical Modelling vol. 33, pp. 3825-35, 2009.
 F. Tornabene, F. Nicholas, B. Michele “Local GDQ Method for the Natural Frequencies of Doubly-Curved Shells with Variable Thickness: A General Formulation,” Composites Part B, vol. 92, pp. 265-289, 2016.
 J. N. Reddy “Mechanics of Laminated Composite Plates and Shells Theory and Analysis,” 2nd Edition, CRC Press, 2004.