Liquefaction is the loss of shear resistance in a soil under
various loading conditions. It is an important topic of study in
seismic engineering due to its potential to cause damage to
structures that otherwise could survive a seismic event. In
liquefaction, the movement of particles is generally viewed as
random and isotropic. A numerical study has been performed based on
the hypothesis that as liquefaction occurs, initially randomly
placed particles become organized into a lattice structure. As a
result, the initial behavior may be isotropic, but there is a
progressive movement to anisotropic behavior as cyclic shearing is
applied. The study is performed under ideal conditions considering
spherically shaped particles of the same size in pure shear. The
results of the study showed that the particles organize to the same
lattice structure regardless of friction coefficient or shear plane
selection. Consequently, this study provides a tool for calibrating
constitutive models related to liquefaction. It also provides an
accurate discrete element method for evaluating particle dynamics.
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