Mechanical metamaterials with penetrating struts for tunable low-frequency bandgaps

AI Insight

Researchers developed a new class of mechanical metamaterials featuring penetrating struts that create tunable low-frequency bandgaps, allowing selective blocking of vibrations and sound waves at specific frequencies. These architected materials achieve bandgap tunability through geometric design modifications of internal structures, enabling control over which frequencies are transmitted or blocked without changing the base material composition. The penetrating strut architecture provides enhanced mechanical stability while maintaining the desired wave-filtering properties at frequencies below 1000 Hz.

Why it matters

This technology could enable advanced vibration isolation systems for sensitive equipment, noise reduction in buildings and vehicles, and improved seismic protection for structures. The ability to tune bandgaps at low frequencies addresses a longstanding engineering challenge, as traditional materials struggle to block low-frequency vibrations without excessive bulk or weight.