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

Area of Science:

• Materials Science
• Composite Materials
• Mechanical Engineering

Background:

• Traditional materials fail to meet increasing performance demands.
• Interpenetrating phase composites (IPCs) offer enhanced capabilities due to interconnected phases.
• Microlattice structures provide unique mechanical properties.

Purpose of the Study:

• To develop a novel fabrication method for interpenetrating phase microlattices (IPMs).
• To investigate the mechanical and dynamic properties of resin-rubber IPMs.
• To evaluate the energy dissipation performance of IPMs for vibration attenuation.

Main Methods:

• Fabrication of IPMs using a resin skeleton and a flexible rubber secondary phase.
• Static compression tests to obtain stress-strain curves and assess toughness/energy absorption.
• Noncontact dynamic response measurements to analyze vibration damping properties.

Main Results:

• IPMs exhibited significantly enhanced toughness and specific energy absorption.
• The combination of size effect and lattice topology design contributed to improved mechanical performance.
• IPMs demonstrated substantial vibration attenuation, with a maximum 76.3% range and 31.5 dB transmissibility loss.
• Superior energy dissipation performance compared to similar IPC attenuation systems was observed.

Conclusions:

• The novel IPMs show excellent mechanical properties and vibration damping capabilities.
• These materials are promising for applications requiring high performance and energy absorption.
• The fabrication method and design principles offer a pathway for advanced composite development.