Cylinder type pyramid lattice sandwich composite structure analysis of the axial compression performance

The present work provided the access to study the uniaxial compression behaviour of cylinder type pyramid lattice sandwich composite material structure. In the uniaxial compression tests, the main failure modes are the failure of Euler buckling of cylindrical shells, overall buckling, local buckling between corrugated panel and shell wall collapsing. In addition to experimental testing, finite element models for compression simulations have been developed using ABAQUS software. It must be pointed out that, in the course of the experiment, the greater the thickness of the specimen, the shorter the course of its local buckling, the more obvious the collapse of the panel. As a result, the pyramid lattice cylindrical shell panel is the main load bearing component, and the thickness of the panel is the main factor of carrying capacity. Therefore, the load bearing capacity improvement of lattice cylindrical shell can be realized by changing the thickness of the panel and the core design should proceed with the advancement of production process.