Comparison Of Different Auxetic Enhancement Layers For Shunted Piezoelectric Control

Piezoelectric patches connected to passive shunt circuits can be applied to structures for effective vibration attenuation. The structure under consideration consists of a beam, piezoelectric patches, and possibly an inserted auxetic layer, enhancing the electromechanical coupling. Based on previous research, this study investigates the improvement in vibration suppression achieved by introducing an auxetic spacing layer between the shunted piezoelectric elements and the host beam. For the simulation of the system’s dynamic response, a finite element (FE) model has been developed. Two different types of auxetic microstructures are studied, and their influence on shunted piezoelectric control is compared. With fixed values for the electrical circuit components, the frequency response of the structure is analyzed. Results show that the effectiveness in damping the second vibration mode is strongly dependent on the geometry of the auxetic microstructure.