Nearly Frictionless Plastic Flow within Annular Micropores

Abstract

Plastic flows associated with very large deformations for glassy (amorphous) matter confined in microscopic domain at room temperature regime was investigated using a transition-state dependent model considering the shear thinning behavior which means, once material being subjected to high shear rates, the viscosity diminishes with increasing shear rate. By using the boundary perturbation method, we obtained a class of plastic flows for certain activation energy and activation volume with the presumed small wavy roughness distributed along the walls of an annular micropore. Results show that there might be nearly frictionless plastic flows due to the almost vanishing viscosity in micropores.