Surface waves in granular phononic crystals

被引：15
|
作者：
Pichard, H. [1 ]
Duclos, A. [1 ]
Groby, J. -P. [1 ]
Tournat, V. [1 ]
Zheng, L. [1 ]
Gusev, V. E. [1 ]
机构：
[1] Univ Maine, LAUM, CNRS, UMR 6613, Ave O Messiaen, F-72085 Le Mans, France
来源：
PHYSICAL REVIEW E | 2016年 / 93卷 / 02期
关键词：
ELASTIC-WAVES; PROPAGATION; DISCRETE; MEMBRANES; LAYER;
D O I：
10.1103/PhysRevE.93.023008
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The existence of surface elastic waves at a mechanically free surface of granular phononic crystals is studied. The granular phononic crystals are made of spherical particles distributed periodically on a simple cubic lattice. It is assumed that the particles are interacting by means of normal, shear, and bending contact rigidities. First, Rayleigh-type surface acoustic waves, where the displacement of the particles takes place in the sagittal plane while the particles possess one rotational and two translational degrees of freedom, are analyzed. Second, shear-horizontal- type waves, where the displacement of the particles is normal to the sagittal plane while the particles possess one translational and two rotational degrees of freedom are studied. The existence of zero-group-velocity surface acoustic waves of Rayleigh type is theoretically predicted and interpreted. A comparison with surface waves predicted by the reduced Cosserat theory is performed, and some limitations of the latter are established.
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页数：19
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