Techno Press

Steel and Composite Structures   Volume 21, Number 1, May20 2016, pages 37-55
Vibration and buckling analyses of laminated panels with and without cutouts under compressive and tensile edge loads
T. Rajanna, Sauvik Banerjee, Yogesh M. Desai and D.L. Prabhakara

Abstract     [Full Text]
    In this study, the influence of centrally placed circular and square cutouts on vibration and buckling characteristics of different ply-oriented laminated panels under the action of compressive and/or tensile types of nonuniform in-plane edge loads are investigated. The panels are inspected under the action of uniaxial compression, uniaxial tension and biaxial, compression-tension, loading configurations. Furthermore, the effects of different degrees of edge restraints and panel aspect ratios are also addressed in this work. Towards this, a nine-node heterosis plate element has been adopted which includes the effect of shear deformation and rotary inertia. According to the results, the tensile buckling loads are higher than that of compressive buckling loads. However, the tensile buckling load continuously reduces with the increased cutout sizes irrespective of ply-orientations. This is also true for compressive buckling loads except for some particular ply-orientations with higher sized cutouts.
Key Words
    laminates; cutout parameters; finite element method; heterosis element; vibration; buckling
(1) T. Rajanna, Sauvik Banerjee, Yogesh M. Desai:
Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai 400 076, India;
(2) T. Rajanna:
Department of Civil Engineering, B.M.S College of Engineering (Autonomous College under VTU), Bengaluru-560019, India;
(3) D.L. Prabhakara:
Sahyadri College of Engineering & Management, Mangalore 575 007, India.

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