Vol.16, No.1, 2016, pp.43–48
UDC  624.073.011.1.042.5

THERMO-ELASTIC STABILITY OF ANGLE-PLY LAMINATES – APPLICATION OF LAYERWISE FINITE ELEMENTS

Marina Ćetković1, Lénárt György2

1)University of Belgrade, Faculty of Civil Engineering, Serbia, marina@grf.bg.ac.rs

2)Eötvös József College, Institute for Hydraulic Engineering and Water Management, Baja, Hungary

Abstract

In this paper thermal buckling analysis of angle-ply laminates is analysed using Generalized Layerwise Plate Theory (GLPT) of Reddy, /1/. The finite element solution is derived from the weak form of the problem. The nine-node Lagrangian isoparametric finite element is used to derive the element stiffness matrix and geometric stiffness matrix. The originally coded MATLAB programme is used to analyse the effects of side to thickness ratio a/h, aspect ratio a/b, ply-orientation angle θ, modulus ratio E1/E2, thermal expansion coefficient ratio α2/α1, temperature distribution and different boundary conditions, on thermo-elastic stability of laminated composite plates. The accuracy of the numerical model is verified by comparison with the available results from the literature.

Keywords: thermo-elastic stability, angle-ply laminates, layerwise finite element

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