Architected Interpenetrating Phase Microlattice With Superior Vibration Attenuation and Energy Absorption Performance

With the increasing demand for material performance, traditional pure materials no longer meet the stringent requirements. Interpenetrating phase composites (IPCs), composed of two or more completely interconnected constituent phases, have garnered significant attention for their extraordinary capabilities. Here, we propose a novel fabrication method for interpenetrating phase microlattices (IPMs) synthesized with a resin skeleton and flexible rubber as the secondary phase. The stress-strain curves of different types of IPMs were obtained by static compression tests, which revealed highly enhanced toughness and specific energy absorption through the combination of size effect and lattice topology design. Noncontact dynamic response measurements were used to analyze the dynamic properties of both skeletons and IPMs. By leveraging the intrinsic energy dissipation capacity of the introduced secondary soft phase, IPMs exhibited a maximum 76.3% attenuation range and a maximum 31.5 dB transmissibility loss. The average transmissibility versus structural density was compared with that of similar IPC attenuation systems, demonstrating the superior energy dissipation performance of the IPMs.