Overview: Dry granular materials, such as sand, sugar and powders, can bepoured into a container like a liquid and can also form a pile,resisting gravity like a solid, which is why they can be regarded as afourth state of matter, neither solid nor liquid. .This book focuses on defining the physics of dry granular media in asystematic way, providing a collection of articles written byrecognised experts. The physics of this field is new and full ofchallenges, but many questions (such as kinetic theories, plasticity,continuum and discrete modelling) also require the strongparticipation of mechani
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