Abstract
To study experimentally the micro-mechanisms of deformation in granular materials a special shear apparatus was designed. The tested material is an assembly of wooden rods. Experimental results are concerned with macroscopic behavior (boundary conditions) and local kinematics (namely, rods displacements and rotations). In a first part, these local variables are compared with the continuum mechanics predictions. In a second part Contact Dynamics method is used for numerical simulations of homogeneous or non-homogeneous tests. Comparison with experimental results shows a good accuracy of the numerical code to describe local kinematics if the initial configuration of grains is chosen exactly as the experimental one.
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