HUILLARD , Guillaume

Propagation of sound waves in cohesionless granular packings presents original and complex behaviors due to the divided nature of those materials. They behave as disordered and nonlinear media. Our study is original because we use photoelastic cylinders. By means of a fast camera, we visualize the deformation field associated to the sound wave...

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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 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...

By means of photoelasticity, we success in visualizing in real time the propagation of acoustic waves in a granular packing of cylinders. Our experimental procedure allows an access to the local state of stress of individual grains as a function of time with a good accuracy. We first present results on 1d chains of cylinders that are...

By means of photoelasticity, we success in visualizing in real time the propagation of acoustic waves in a granular packing of cylinders. Our experimental procedure allows an access to the local state of stress of individual grains as a function of time with a good accuracy. We first present results on 1d chains of cylinders that are...

By means of a photoelastic method, we access the visualization of acoustic waves propagating in a one dimensional array of noncohesive cylinders. As pointed by Nesterenko in the case of spherical grains (V.F. Nesterenko, J. Appl. Mech. Tech. Phys. 24, p. 567 (1983)), the nonlinearity of the contact law between the grains induces a dependence of...