  Motivated by results of the topological theory of glasses accounting for
geometric frustration, we develop the simplest possible continuum mechanical
model of defect dynamics in metallic glasses that accounts for topological,
energetic, and kinetic ideas. The model is aimed towards the development of a
microscopic understanding of the plasticity of such materials. We discuss the
expected predictive capabilities of the model vis-a-vis some observed physical
behaviors of metallic glasses.
