Abstract Truss lattice, as a representative lightweight porous material, provides significant advantages, including high design freedom, low weight, and superior specific strength/stiffness. However, research into their mechanical properties has primarily focused on uniaxial compression and tension due to their multiscale characteristics, with limited data available for out-of-plane loading conditions such as bending and shear. This study focuses on Body-Centered Cubic (BCC) lattice structures. Two groups of specimens with typical parameters were designed, along with dedicated experimental setups. A modified beam element-based method was employed for mechanical equivalent modeling of the lattice structures. The mechanical behavior under tension, compression, bending, and shear loads was investigated through a combination of numerical simulation and specialized experimental testing. Both experimental data and numerical results indicate that the lattice structures exhibit anisotropic properties, with tensile strength lower than compressive strength. Bending and shear strengths were observed not to exceed 2.1 MPa. The adopted mechanical equivalent modeling method effectively captures the mechanical characteristics of the lattice.
Wang et al. (Mon,) studied this question.