Flexural performance and failure mode of wood-based sandwich structure plate members

Pyramid-type and lattice-type sandwich structure plate members were designed and fabricated using oriented strand board as the panel and larch finger-joined lumber as the core material, while glass fiber was used as the panel reinforcing material. The mechanical properties of the four types of sandwich structure plate members were tested by four-point bending test. The test results showed that the damage forms of the plate members were mainly the debonding between the core and the panel and the bending failure of the core. It can be concluded from the mechanical properties of plate members with sandwich structure that the transfer path and efficiency between the panel and the core layer of a sandwich structure plate members have a decisive influence on the flexural performance of the specimen. The core configuration determines the relative stiffness ratio between the panel and the core. This study was able to provide reliable experimental data and theoretical support for the application of wood-based sandwich structure plate members in prefabricated temporary buildings, landscape timber structures, and other fields, in order to promote their optimized design and wide application.