Tuning the locally resonant phononic band structures of two-dimensional periodic electroactive composites

• Published in: Physica. B, Condensed matter Vol. 431; pp. 23 - 31
• Main Authors: Zhou, Xiaoling, Chen, Changqing
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15.12.2013; Elsevier
• Subjects: Band structure; Band structure of solids; Condensed matter; Condensed matter: structure, mechanical and thermal properties; Electric field; Electric fields; Electroactive polymer; Electroactive polymers; Energy gaps (solid state); Exact sciences and technology; Finite element method; Inclusions; Initial stress; Initial stresses; Lattice dynamics; Mathematical analysis; Multilayered locally resonant phononic crystal; Other topics in lattice dynamics; Physics; Finite element method; Band structure; Initial stress; Electroactive polymer; Electric field; Multilayered locally resonant phononic crystal; Phononic crystal; Elastomers; Inclusions; Multilayers; Energy gap; Compressive stress; Tensile stress; Composite materials; Electric field effects; Analytical method
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2013.08.042

The band structures of two locally resonant phononic crystals (LRPCs) with periodic multilayered cylindrical inclusions embedded in an elastic matrix are investigated by the finite-element method. The inclusions consist of electroactive polymer layer(s). Tunability of the band gaps of the phononic crystals by applying electric field upon the electroactive layer is demonstrated. A simple analytical expression is presented on the relationship between the stop band boundaries and the electric field. Good agreement between the analytical and numerical predictions is obtained. The effects of initial stress on the band structures are explored. It is found that tensile initial stress shifts up the band gaps while compressive initial stress shifts down or even closes them.