  Particle-based simulations of discontinuous shear thickening (DST) and shear
jamming (SJ) suspensions are used to study the role of stress-activated
constraints, with an emphasis on resistance to gear-like rolling. Rolling
friction decreases the volume fraction required for DST and SJ, in quantitative
agreement with real-life suspensions with adhesive surface chemistries and
"rough" particle shapes. It sets a distinct structure of the frictional force
network compared to only sliding friction, and from a dynamical perspective
leads to an increase in the velocity correlation length, in part responsible
for the increased viscosity. The physics of rolling friction is thus a key
element in achieving a comprehensive understanding of strongly shear-thickening
materials.
