MATEC Web of Conferences
Volume 172, 20183rd International Conference on Design, Analysis, Manufacturing and Simulation (ICDAMS 2018)
|Number of page(s)||7|
|Published online||12 June 2018|
Free vibration characteristics of thick doubly curved variable stiffness composite laminated shells using higher-order shear deformation theory
School of Aeronautical Sciences, Hindustan Institute Technology and Science 603103 Chennai, India
2 School of Aeronautical Sciences, Hindustan Institute Technology and Science 603103 Chennai, India
3 Tech Mahindra Limited, Electronics city, 560100 Bangalore, India
* Corresponding author: firstname.lastname@example.org
In the present work, the natural frequencies of cylindrical and spherical laminated shells with variable stiffness are numerically studied using a shear flexible isogeometric finite element. The kinematics relies on cubic shear deformation theory in which cubic variation is assumed for the surface displacements and a quadratic variation for the traverse displacement along the thickness. A zig-zag function, used for the in-plane displacements, accounts for the abrupt discontinuity at the boundaries of the laminae. The Lagrangian equations of motion is deployed to solve the frequencies of curved panels. A detailed parametric analysis examines the influence of fibre centre/edge angles, shell geometric variables, material anisotropy and edge conditions on frequencies and mode shapes.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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