Study on bending strength of sandwich U-shaped beam with lattice core

Abstract

In this paper, the bending collapse behavior of sandwich U-shaped beam with lattice core has been investigated by using finite element analysis. In particular, the effects of geometric properties of lattice core and faceplate on the maximum bending moment M_max and the critical angle θ_cr were discussed. The existence of lattice core could prevent the elastic buckling of the surrounding U-shaped beam, and enhance M_max to the fully plastic moment of these plates. Based on numerical investigation, the mode map for θ_cr was obtained as a function of the relative thickness of the plate t/h and the relative density of the lattice core ρ/ρ_s.