Mechanical and energy absorption properties of the composite XX-type lattice sandwich structure

In this paper, two types of the composite XX-type lattice sandwich structure (XX (I) and XX (II)) were made of panels (medium-density fiberboard and plywood) and core (birch) by using a type of insertion-glue method. An out-of-plane compressive test and a short beam shear test were carried out to investigate the failure modes, mechanical and energy absorption properties of the composite XX-type lattice sandwich structure. Results showed that the compression and short beam shear failure modes of composite XX-type lattice sandwich structure were mainly the shear failure of the core and the failure of panels. The sandwich structure with the core diameter of 8 mm had good compression property. The XX (II)-type lattice sandwich structure of the combination of Plywood + birch had better compression, short beam shear, and energy absorption properties. The combination of MDF + birch was more suitable for the compressive theoretical model.

Automated summary

The study found that the compression and short beam shear failure modes of the composite XX-type lattice sandwich structure were mainly the shear failure of the core and the failure of panels, with the sandwich structure having a core diameter of 8 mm exhibiting good compression properties. The XX (II) lattice sandwich structure combining Plywood + birch showed better compression, short beam shear, and energy absorption properties. The combination of MDF + birch was found to be more suitable for the compressive theoretical model.