Granular boundary layer induces drilling nonlinearity
Cohesionless loose granular material (CLGM), defined by the absence of interparticle cohesion and a fragile packing structure, are highly sensitive to mechanical disturbances and exhibit fluid-like dynamics under shear. This study investigates the nonlinear behavior arising from the interaction between an auger drill and CLGM through a combination of laboratory experiments and discrete element met
