1. Photoelastic study of acoustic wave propagation in grain packings
- Author
-
Xavier Noblin, Guillaume Huillard, Jean Rajchenbach, Masami Nakagawa, and Stefan Luding
- Subjects
Vibration ,Stress (mechanics) ,Photoelasticity ,Materials science ,Amplitude ,Wave propagation ,Acoustics ,Acoustic wave equation ,Acoustic wave ,Mechanics ,Granular material - Abstract
By means of photoelasticity, we success in visualizing in real time the propagation of acoustic waves in a granular packing of cylinders. As previously mentioned by Nesterenko [1] for the case of spherical grains, the nonlinearity of the contact law between grains induces a dependence of the wave velocity both on its amplitude and on the confinement force. Our experimental procedure allows an access to the local state of stress of individual grains as a function of time with a good accuracy. Our results concerning the wave velocity as a function of the amplitude, and of the confinement force, are compared to theoretical predic tions and to the spherical beads case.
- Published
- 2009
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