Compression and energy absorption properties of the truss-like lightweight materials based on symmetric groups

Abstract Truss-like lightweight materials (TLMs) have been widely used in aeronautics and astronautics, because of excellent mechanical property superior energy absorption capability. The design TLMs’ meso-structures was a critical task to improve its performance. Hence, structure method based on the symmetric groups proposed for TLMs, novel hexagonal prism TLM’s meso-structure deduced by translational operations space group P 6 mm . To investigate performance TLM, analysis model established. predictive equations compression Euler–Bernoulli beam theory. stress distribution under load discussed finite element method, properties were investigated. simulation results agreement with results. In addition, common FCC BCC TLMs using symmetry their predicted. showed that TLM this study had better than at same relative density.