TY - GEN
T1 - Numerical investigation of spatial distribution of deformation in granular media
AU - Namikawa, T.
PY - 2011/12/1
Y1 - 2011/12/1
N2 - The change in the microstructure of granular materials under a biaxial loading condition was investigated by numerically simulating an idealized assembly of two-dimensional particles. The distinct element method was employed for simulating an idealized assembly. Local strain increments were calculated from relative displacements of particles within triangle elements which were defi ned by particle centers. The obtained local strain increment was analyzed from spatial statistical point of view. The coeffi cient of spatial autocorrelation of the local strain increment distribution was calculated to estimate the intensity of spatial dependence of the local strains in the entire area of the specimen. The spatial analysis results indicate that the range of autocorrelation designating the range of the presence of spatial autocorrelation increased during the biaxial compression loading. This variation of the range of autocorrelation implies that the spatial microstructure of granular materials varies throughout deformation processes.
AB - The change in the microstructure of granular materials under a biaxial loading condition was investigated by numerically simulating an idealized assembly of two-dimensional particles. The distinct element method was employed for simulating an idealized assembly. Local strain increments were calculated from relative displacements of particles within triangle elements which were defi ned by particle centers. The obtained local strain increment was analyzed from spatial statistical point of view. The coeffi cient of spatial autocorrelation of the local strain increment distribution was calculated to estimate the intensity of spatial dependence of the local strains in the entire area of the specimen. The spatial analysis results indicate that the range of autocorrelation designating the range of the presence of spatial autocorrelation increased during the biaxial compression loading. This variation of the range of autocorrelation implies that the spatial microstructure of granular materials varies throughout deformation processes.
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M3 - Conference contribution
AN - SCOPUS:84885812912
SN - 9780980824414
T3 - Computer Methods for Geomechanics: Frontiers and New Applications
SP - 381
EP - 386
BT - Computer Methods for Geomechanics
T2 - 13th International Conference of the International Association for Computer Methods and Advances in Geomechanics, IACMAG 2011
Y2 - 9 May 2011 through 11 May 2011
ER -