engleski

Influence of plywood structure on sandwich panel properties: Variability of veneer thickness ratio

In this study, a 3-D analysis of sandwich-structured composite ply-wood was done, in the aim to determine a stress and strain distribution in their individual layers. The influence of veneer thickness ratio in plywood on bending properties of sandwich panel was observed. The sandwich panel has been made from 3-layer beech veneer plywood (t(nom) = 4.5 mm) and PVC foam core (t(nom) = 20 mm). The experimental results contain the flexural properties of the sandwich panel, obtained by the three-point bending test method. Analysis of stress and strain distribution is carried out using the finite element method. The research results indicate that the variation of veneer thickness ratio in plywood significantly changes the stress distribution in each layer of the sandwich panel. A significant ratio of normal and shear stress in the transverse direction was determined in each layer of plywood, as well as in the core, which suggests the importance of their consideration in the analysis of sandwich panels.

plywood; sandwich-panel; bending properties; finite element method

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