Mechanical Metamaterials

The Hierarchical Dual-Phase Mechanical Metamaterial (HDMM) developed in AMAIS Lab is an advanced acoustic metamaterial designed for ultra-low vibration and broadband noise suppression. Unlike conventional single-phase metamaterials, the HDMM integrates two mechanical phases—a stiff load-bearing matrix and a compliant resonant phase—within a hierarchically organized structure.
This multi-scale design enables simultaneous control over local resonance, impedance matching, and energy dissipation, resulting in superior broadband attenuation and direction-selective acoustic filtering. The dual-phase interaction allows acoustic waves to be selectively confined or dissipated without compromising structural stiffness.
Through analytical modeling, finite-element simulations, and additive manufacturing validation, the HDMM demonstrates extreme performance in suppressing unwanted vibration modes and controlling elastic energy flow across multiple frequency ranges.

Main Application Areas

• Precision mechanical systems – suppression of micro-vibration for enhanced measurement stability.

• Acoustic shielding – broadband noise control in transportation and industrial environments.

• Rotating machinery and shafts – reduction of resonance-induced fatigue and dynamic imbalance.

• Next-generation metamaterial-based sensors – enhancement of acoustic sensitivity through wave confinement and selective filtering.
  
  

By uniting hierarchical geometry and dual-phase mechanics, the HDMM provides a new pathway toward multifunctional, adaptive acoustic metamaterials that combine light weight, tunability, and superior wave control.