Journal
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
Volume 106, Issue -, Pages 357-362Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijmecsci.2015.12.004
Keywords
Active control action; Nonlinear phononic crystals; Elastic waves; Wave amplitude; Hard and soft nonlinearities
Categories
Funding
- National Natural Science Foundation of China [11532001, 11572007]
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Different from the linear phononic crystals, elastic waves can exhibit more interesting phenomena in periodic structures with nonlinear properties. By the active control action, elastic wave characteristics can be tuned based on the demand in practical application. This work discusses the possibility of the active control action on elastic waves in phononic crystals with the weakly nonlinear monoatomic lattice chain. Based on the Lindstedt-Poincare method, the approximate solution of the dispersion relation is derived. Numerical calculations are performed to discuss the influences of the active control action on wave propagation properties. In order to present the features of nonlinear elastic wave dynamics, it is mainly focused on the effects of active control accompanied by the changes of the elastic wave amplitude, nonlinear degree, hard and soft nonlinearities. It is expected to extend the analysis and design of new phononic crystal devices for both the theory and application fields. (C) 2015 Elsevier Ltd. All rights reserved.
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