Design And Mechanical Analysis Of Lattice Composite Materials

Lattice material is a new kind of high-strength lightweight material, along with shape control, actuator, energy absorption and heat transfer functions. The appearance of lattice materials is to satisfy the needs for the spacecraft bearing the provided loads with the light weight and multifunction. At present, lattice material has already appeared a variety of configurations. This paper presents a configuration design method of pyramida lattice truss sandwich structure and investigates its mechanical properties..In this study, the pyramidal lattice composite sandwich structure is composed of carbon fiber and epoxy resin.. A three dimensional interlacing method was suggested to fabricate the single-layer and double-layer lattice core sandwich structure with different configuration.The mechanical properties of single-layer and double-layer lattice structure were researched by ANSYS under out of plane compression, in-plane compression and shear load, respectively. Firstly, the variation of the elastic Young’s modulous of the lattice structure with different heights and inclination angles were analyzed under out of plane compression. And then, the variation of the elastic Young’s modulous and buckling loading of the lattice structures with different heights and inclination angles were investigated under in-plane compression. Finally,the variation of the elastic shear modulous of the lattice structures different heights and inclination angles were analyzed under shear load.The FEM results indicated that the mechanical behavior of the structure is dominated by the core’s height and truss inclination angle. The elastic modulus of lattice structure increases with increasing its height and inclination angle under out of plane compression and shear load. There is no obvious varition on elastic modulus when the height and inclination angle increases under in-plane compression. However, the buckling load of the lattice structures increases with the increasement of the core’s height and truss inclination angle.