Quasi-static compressive mechanical behaviours of two-phase hybrid lattices based on asymmetric design and bionic strategy

Abstract

Lattice structures have attracted considerable attention in the fields of aerospace, construction, and marine engineering due to their unique properties and enhanced mechanical performance. Nonetheless, conventional single-configuration lattice structures are constrained by limitations in diversity, versatility, and adaptability across multiple scenarios. To mitigate these constraints, a two-phase hybrid lattice structure with modular assembly capability has been developed. This design allows for reconfiguration based on load conditions and functional requirements. We conduct experimental investigations to characterize the mechanical properties of three novel configurations: the asymmetric re-entrant lattice, the bionic lattice, and their hybrid structure. The results indicate that the hybrid lattice demonstrates improved specific energy absorption and exhibits more diversified and flexible properties compared to the conventional single lattice structure. The specific energy absorption and effective Young's modulus of the double asymmetric re-entrant lattice are improved by 32.8 % and 128.36 %, respectively, when compared to benchmark re-entrant lattice. This approach presents a viable solution for the diversification of engineering structures.