User login


You are here

Reactive flow in solids

Laurence Brassart's picture

By Laurence Brassart and Zhigang Suo


When guest atoms diffuse into a host solid and react, the host may flow inelastically. Often a reaction can stimulate flow in a host too brittle to flow under a mechanical load alone. We formulate a theory of reactive flow in solids by regarding both flow and reaction as nonequilibrium processes, and placing the driving forces for flow and reaction on equal footing. We construct chemomechanical rate-dependent kinetic models without yield strength. In a host under constant stress and chemical potential, flow will persist indefinitely, but reaction will rrest. We also construct chemomechanical yield surface and flow rule by extending the von Mises theory of plasticity. We show that the host under a constant deviatoric stress will flow gradually in response to ramp chemical potential, and will ratchet in response to cyclic chemical potential.

The paper has been accepted for publication in the Journal of the Mechanics and Physics of Solids. The manuscript can be downloaded from the following link:

Subscribe to Comments for "Reactive flow in solids"

Recent comments

More comments


Subscribe to Syndicate