Data and code from: Yielding in dense active matter

This dataset contains Python scripts and data files to support an
investigation of the yielding transition in dense active matter in the
limit of slow driving and large persistence times, across a wide range of
material preparations. Under shear, materials prepared to be very low
energy or ‘ultrastable’ are brittle, and well-described by elastoplastic
constitutive laws. We show that, under random active forcing, however,
ultrastable materials are always ductile, as shown by plotting the
stress-strain curve for both active and passive systems. We develop a
modified elastoplastic model that captures and explains these
observations, where the key parameter is the correlation length of the
input active driving field. We also observe large parameter regimes where
the plastic flow is surprisingly well-predicted by the input active
driving field and not highly dependent on the structural disorder,
suggesting new strategies for control. These are shown by plotting the
average stress drops for different driving correlation lengths.