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A wood-based X-type lattice sandwich structure was manufactured by insertion-glue method. The birch was used as core, and Oriented Strand Board was used as panel of the sandwich structure. The short beam shear properties and the failure modes of the wood-based X-type lattice sandwich structure with different core direction (vertical and parallel), unit specification (120 mm × 60 mm and 60 mm × 60 mm), core size (50 mm and 60 mm), and drilling depth (9 mm and 12 mm) were investigated by a short beam shear test and the establishment of a theoretical model to study the equivalent shear modulus and deflection response of the X-type lattice sandwich structure. Results from the short beam shear test and the theoretical model showed that the failure modes of the wood-based X-type lattice sandwich structure were mainly the wrinkling and crushing of the panels under three-point bending load. The experimental values of deflection response of various type specimens were higher than the theoretical values of them. For the core direction of parallel, the smaller the unit specification is, the shorter the core size is, and the deeper the drilling depth is, the greater the short beam shear properties of the wood-based X-type lattice sandwich structure is.

Short beam shear properties and failure modes of the wood-based X-type lattice sandwich structure