Finite element studies on free vibration of laminated composite cylindrical skew panels
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Department of Mechanical Engineering GM Institute of Technology Davangere, Karnataka, INDIA-577006
Department of Mechanical Engineering J.N.N. College of Engineering Shivamogga, Karnataka, INDIA-577204
Department of Civil Engineering Reva Institute of Technology and Management Bangalore, Karnataka, INDIA-560064
Online publication date: 2014-03-07
Publication date: 2014-02-01
International Journal of Applied Mechanics and Engineering 2014;19(1):165-180
This paper presents the finite element studies on free vibration of isotropic and laminated composite cylindrical skew panels. The analysis is performed using CQUAD4 and CQUAD8 elements of MSC/NASTRAN. The effects of the panel angle, skew angle, aspect ratio and length-to-thickness-ratio on fundamental frequency of isotropic cylindrical skew panels are studied. The effects of additional parameters such as the fiber orientation angle, numbers of layers and stacking sequence on the fundamental frequency of antisymmetric composite laminates are also studied. It is found that the CQUAD8 element yields better results than the CQUAD4 element in the validation and convergence studies. The CQUAD8 element is employed for the remaining part of the studies. The fundamental frequencies are found to increase with the panel angle and skew angle. When the number of layers in the laminate is large, the variation of the fundamental frequency with the number of layers is not appreciable. The boundary conditions are found to have a significant influence on the fundamental frequency
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