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Random porosity fields and their influence on the stability of granular media
 

Summary: Random porosity fields and their influence on the
stability of granular media
Jos´e E. Andradea
, Jack W. Bakerb
, Kirk C. Ellisona
a
Department of Civil and Environmental Engineering, Northwestern University,
Evanston, IL 60208, USA
b
Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305, USA
Abstract
It is well established that the mechanical behavior of granular media is strongly influenced
by the media's microstructure. In this work, the influence of the microstructure is studied by
integrating advances in the areas of geostatistics and computational plasticity, by spatially
varying the porosity on samples of sand. In particular, geostatistical tools are used to char-
acterize and simulate random porosity fields that are then fed into a nonlinear finite element
model. The underlying effective mechanical response of the granular medium is governed by
a newly developed elastoplastic model for sands, which readily incorporates spatial variability
in the porosity field at the meso-scale. The objective of this study is to assess the influence
of heterogeneities in the porosity field on the stability of sand samples. One hundred and

  

Source: Andrade, Jose - Department of Civil and Environmental Engineering, Northwestern University

 

Collections: Engineering