Stochastic nonlinear bending response of laminated composite plates with system randomness under lateral pressure and thermal loading |
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Authors: | Achchhe Lal B N Singh Rajesh Kumar |
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Institution: | (1) Department of Mechanical and Industrial Engineering, College of Engineering, Sultan Qaboos University, Muscat, Sultanate of Oman |
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Abstract: | In this paper, the effect of sensitivity of randomness in system parameters on the nonlinear transverse central deflection
response of laminated composite plates subjected to transverse uniform lateral pressure and thermal loading is examined. System
parameters such as the lamina material properties, expansion of thermal coefficients, lamina plate thickness and lateral load
are modelled as basic random variables. A higher order shear deformation theory in the von-Karman sense is used to model the
system behavior of the laminated plate. A direct iterative-based C
0 nonlinear finite element method in conjunction with the first-order perturbation technique developed by the authors is extended
for thermal problem to obtain the second-order response statistics, i.e., mean and variance of the nonlinear transverse deflection
of the plate. Typical numerical results of composite plates with temperature independent and dependent material properties
subjected to uniform temperature and combination of uniform and transverse temperature are obtained for various combinations
of geometric parameters, uniform lateral pressures, staking sequences and boundary conditions. The results have been compared
with those available in the literature and an independent Monte Carlo simulation. |
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Keywords: | |
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