This paper is devoted to the study of the mechanical behaviour undercompression of hollow-sphere packings and, especially, to the characterization ofthe mechanisms that govern their compaction. The aim of this work is to under-stand how the architecture of such materials governs their overall mechanicalbehaviour through a combined approach involving both experiments and model-ling. In this work, emphasis is put on the influence of local plasticity and bucklingof spheres on the effective behaviour of pickings. A finite element modelling isdeveloped taking into account those mechanisms in order to characterize the con-tributions of the stiffness of the meniscuses and the hollow spheres respectively onthe effective stiffness of packings.
展开▼
