Fig. 4: Vibration attenuation test.
From: Impact damping and vibration attenuation in nematic liquid crystal elastomers
The amplitude of the signal (measured in [dB] as a ratio to the incident amplitude) transmitted through the elastomer cylinder is plotted against the vibration frequency. The primary standing wave resonance near 1 kHz is found in all materials, with underdamped PDMS showing several secondary resonance peaks. The overdamped LCE systems have the Q-factor equal to 0.4 (i.e. the damping ratio ζ = 120%), compared with PDMS: Q = 2.4 (ζ = 21%). Supplementary Fig. S4 shows graphical representations of resonance modes.
