Abstract:This study focuses on unraveling the microphysical origins of the
nonlinear elastic effects, which are pervasive in the Earth’s crust.
Here, we examine the influence of grain shape on the elastic
nonlinearity of granular assemblies. We find that the elastic
nonlinearity of angular sand particles is of the same order of magnitude
as that previously measured in spherical glass beads. However, while the
elastic nonlinearity of glass beads increases by an order of magnitude
with RH, that of sand particles is rathe… Show more
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