Figure 3: Experimental set-ups.
From: Polarization bandgaps and fluid-like elasticity in fully solid elastic metamaterials
An electromagnetic shaker is used for transverse excitation in a; and longitudinal excitation in b. Rotational excitation is achieved by using an electric motor, which exerts a torque pulse about the meta-rod’s axis (x axis), as shown in c. Accelerometers are used to obtain the elastic responses at different positions.
