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The purpose of this study is to investigate the effects of particle stiffness on the mechanical response between a granular assembly and an acrylic cylinder under confined compression. Variations of wall strain are measured through strain gages at three given heights and used to calculate the relevant stresses through a generalized Hooke's law. Steel spheres and polystyrene spheres are selected to characterize the effects of particle stiffness. Experimental results show that a granular assembly of high-stiffness particles is able to transmit more vertical force, dissipates less energy in the lateral deformation, and causes a smaller frictional effect between particles and wall

Effects of Particle Stiffness on Mechanical Response of Granular Solid Under Confined Compression