Conference Papers

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    Transverse stresses in antisymmetric angle ply sandwich plates - Analytical evaluation of refined higher order shear deformation theories
    (2010) Swaminathan, K.; Sangwai, G.R.
    In the present work two higher order computational models with 9 and 12 DOF already available in the literature for which analytical formulations and solutions for the stress analysis not yet reported are considered. In addition to these models, few higher order models and the first order model developed by other investigators are also considered for the evaluation. A simply supported plate subjected to sinusoidal transverse load with SS-2 boundary conditions is considered for the analysis. Solutions are obtained using Navier's technique. Transverse stresses are computed by post processing technique and the accuracy of models in predicting the stresses is evaluated. © (2010) Trans Tech Publications.
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    Isogeometric Analysis of Composite Sandwich Plates Using Equilibrium-Based Stress Recovery Procedure
    (Springer Science and Business Media Deutschland GmbH, 2023) Chethan, J.; Pavan, G.S.
    Composite sandwich plates consist of a core and face sheets on the top and bottom.Accurate determination of three-dimensional stress states in sandwich plates by numerical approach requires the adoption of 3D finite element (FE) modeling or FE modeling based on layer-wise theories.Though both these numerical approaches give accurate results, they are computationally expensive.This study introduces an equilibrium-based stress recovery approach for determining three-dimensional stress state in composite sandwich plates subjected to transverse loading.This numerical approach is a two-part process, with the initial step based on the concept adopted by layer-wise theories, and the second step is a post-processing procedure.For approximating the unknown field variables, this computational approach employs non-uniform rational B-splines (NURBS).NURBS functions offer the flexibility of a higher degree of inter-element continuity.The study has adopted numerical examples based on the bending of sandwich plates under a sinusoidal load and an evenly distributed load with different edge conditions.Results obtained were compared with the 3D FE method and layer-wise theories and were found to be accurate.In comparison to the 3D FE method and the layer-wise approach, the study reveals that the proposed strategy can provide correct findings with a substantially lesser number of degrees of freedom. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.