Wave momentum in models of generalized continua

被引:2
作者
Rousseau, Martine [1 ]
Maugin, Gerard A. [1 ]
机构
[1] Univ Paris 06, Inst Jean Le Rond dAlembert, UMR CNRS 7190, F-75252 Paris 05, France
关键词
Wave momentum; Generalized continua; Polar media; Gradient elasticity; Nonlocal elasticity; Quasi-particles; SURFACE-WAVES; ELASTICITY; CONSERVATION; FORMULATIONS; STRESS; LAWS;
D O I
10.1016/j.wavemoti.2012.12.007
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
The possibility of associating the notion of quasi-particles with elastic wave modes is explored for three basic models of generalized continua: strain-gradient model (weak nonlocality), elasticity with a microstructure such as in Cosserat/micropolar materials, and a true nonlocal model involving the long-range interactions in the underlying crystal lattice. In each case a simplified one-dimensional model is considered. Approximate solutions involving small parameters and exhibiting scale effects are obtained for the Newtonian-like motion of associated quasi-particles. Interpretation for alternate wave-like and quasi-particle-like behaviors is given. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:509 / 519
页数:11
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