Abstract
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.
Highlights
Wood is a high-quality material, compared with other building materials or metal, it has outstanding thermal insulation, high strength-weight ratio, sound absorption and vibration isolation, comfortable texture, and offers environmental protection
We explored the short beam shear properties of the wood-based X-type lattice sandwich structure by designing eight types of X-type lattice sandwich structures
The short beam shear properties and the failure modes of the wood-based X-type lattice sandwich structure with different core direction (BS1 and BS2), unit specification (BS3 and BS4), core size (BS5 and BS6), and drilling depth (BS7 and BS8) were investigated
Summary
Wood is a high-quality material, compared with other building materials or metal, it has outstanding thermal insulation, high strength-weight ratio, sound absorption and vibration isolation, comfortable texture, and offers environmental protection. These characteristics make wood and wood products more and more widely used in the field of wood construction (Elias et al 2018; Marius et al 2018). The emphasis of processing and utilization in the future is the in-depth development and high value-added utilization of advanced technologies of artificial fast-growing forests, lowquality wood, processing residues and biomass materials (Min and Zhi 2004; Wang et al 2019; Nguyen et al 2019; Zhang et al 2018; Yuan et al 2013). With the increasing awareness of environmental issues, the research of biomass composites based on renewable resources has become more and more popular (Li and Hu 2019; Hao et al 2017; Qin et al 2018; Li et al 2018, 2019a, b; Lu et al 2014)
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