Abstract
In this paper, a wood-based double X-type lattice sandwich structure was manufactured where wood-plastic composites (WPC) and Oriented Strand Boards (OSB) were used as panels, birch and glass fiber reinforced plastic (GFRP) were used as cores via a type of insertion-glue method. The compressive behavior and failure modes of the wood-based double X-type lattice sandwich structure were investigated by a flatwise compressive test and an analytical model. Results from the flatwise compressive test and the analytical model showed that the failure modes of the combination of WPC + GFRP and OSB + GFRP were primarily panel failure, while the failure modes of the combination of WPC + birch and OSB + birch were primarily core shear failure. The diameter of the core influenced the compressive performance of the double X-type lattice sandwich structure. The combination of OSB + birch with both core and panel damaged had better compression performance. The theoretical model was better suited for the combination of OSB + birch. The combination of OSB + GFRP and OSB + birch had larger specific strength and modulus, which was lighter in weight and higher in strength.
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