Abstract
In this paper, the static and free vibration analyses of the sandwich folded plate modeled by layer-wise (LW) theory are studied. In the theory, the continuity displacement condition is imposed at the layer’s interfaces. Each layer of the plate is modeled by the first-order shear deformation theory (FSDT). The numerical solutions are obtained by using the cellbased smoothed discrete shear gap method (CS-DSG3). Some examples are implemented to demonstrate the accuracy of the LW theory for the sandwich folded plate analyses.
Highlights
Folded plates are shell types consisting of flat plates, rigidly connected together along their edges forming folds
Sandwich folded plate structures have a wide range of applications such as interiors, roofs, buildings, vehicle chassis, ship hulls and among other structures
Sandwich structures are very susceptible to failure due to local stress concentrations induced in areas of load introduction, supports, geometrical and material discontinuities
Summary
Folded plates are shell types consisting of flat plates, rigidly connected together along their edges forming folds. Haldar and Sheikh [7] used to combine with LW theory for static and free vibration a shear flexible element to analyze the free vibration of analyses of sandwich folded plates Numerical results in both isotropic and composite plates. All of studies in literature related to the analysis LW FORMULATION BASED ON FSDT FOR of folded composite plates used the equivalent single- SANDWICH FOLDED PLATE layer (EQ) theory to model behavior of laminate composite plate. This theory is simple and achieved good results. CS-DSG3 using triangular elements have been proposed for static, free vibration and dynamic analysis of plate and shell In this method, the bounded domain strains. Ke is smoothed element stiffness matrix; Me is mass matric defined by lump mass technique [5]; and Fe is load vector
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