Journal
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
Volume 61, Issue 1, Pages 61-77Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jmps.2012.09.007
Keywords
Reaction; Diffusion; Creep; Plasticity; Viscoelasticity
Funding
- National Science Foundation [CMMI-1031161]
- Belgian American Educational Foundation (BAEF)
- Special Fund for Research of Belgium (FSR) through a FSR-UCL
- Alexander von Humboldt Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1031161] Funding Source: National Science Foundation
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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 arrest. 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. (C) 2012 Elsevier Ltd. All rights reserved.
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