  The evolution of the internal granular structure in shear-arrested and
shear-flowing states of granular materials is characterized using fabric
tensors as descriptors of the internal contact and force networks. When a
dilute system of frictional grains is subjected to a constant pressure and
shear stress, the bulk stress ratio is well-predicted from the anisotropy of
its contact and force networks during transient flow prior to steady shear flow
or shear arrest. Although the onset of shear arrest is a stochastic process,
the fabric tensors upon arrest are distributed around nearly equal
contributions of force and contact network anisotropy to the bulk stress ratio.
The distribution becomes seemingly narrower with increasing system size. The
anisotropy of the contact network in shear-arrested states is reminiscent of
the fabric anisotropy observed in shear-jammed packings.
