Anisotropy in Packing Structure and Elasticity of Sintered Spherical Particles
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概要
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By computer simulation, we estimated macroscopic elastic moduli of sintered equal-sized spherical particles. The simulation is composed of sequential accumulation of spheres and structural analysis of a "random network of 6-degree-freedom springs", which is a mechanical model of "sintered particles". From the examination of statistical characteristics of the random packings of spheres, we discovered that their packing structure is affected by gravity ; more precisely, line segments connecting the centers of spheres in contact lie more frequently around the direction of 45° from the vertical (gravity) line, although they are uniformly distributed about the vertical line. This non-uniform zenithal frequency-distribution of segments makes, in turn, the sintered aggregates transversely isotropic in elasticity : Young's modulus in the vertical direction is roughly 17% larger than that in the horizontal direction. Our additional experiments using sintered glass-beads saturated with water support the simulated anisotropy.
- 一般社団法人日本機械学会の論文
- 2002-10-15
著者
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Kato Hiroshi
Division Of Cardiovascular Surgery Toyonaka Municipal Hospital
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Kurashige Michio
Department Of Mechanical Engineering Iwate University
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Kurashige Michio
Department Of Mecanical Engineering Ii Faculty Of Engineering Tohoku University
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Imai Kazuwo
Department Of Mechanical Engineering Iwate University
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MATSUNAGA Chikako
Division of Engineering, Iwate University
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Matsunaga Chikako
Division Of Engineering Iwate University
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