On the Effect of Shear Response in Foam Core with and without Step Key Laminates
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The present study explores the effect of introducing stepped key laminates between the face sheets and core of the composite sandwich structure to enhance the shear performance. The core material chosen is polyvinylchloride (PVC) which is sandwiched between two thin, strong face sheets of glass ﬁbre reinforced plastic (GFRP) to construct a sandwich panel of conventional type. The stepped key laminate material is modelled by overlapping chopped strand sheets in step sizes with the required depth and length. To enhance the shear performance, stepped key laminates are placed in the foam core which is grooved with step cuts on its upper and lower faces. ANSYS software is used for simulating the present analysis to evaluate the effect of the number of step size in stepped key laminate material compared with sandwich panel of conventional type. A significant improvement is observed for the simulated response of stepped key model with the increase in its step size. The simulations are validated with experimental results.
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