Nonequilibrium thermodynamics of driven amorphous materials. II. Effective-temperature theory

Eran Bouchbinder and J. S. Langer
Phys. Rev. E 80, 031132 – Published 22 September 2009

Abstract

We develop a theory of the effective disorder temperature in glass-forming materials driven away from thermodynamic equilibrium by external forces. Our basic premise is that the slow configurational degrees of freedom of such materials are weakly coupled to the fast kinetic-vibrational degrees of freedom and therefore that these two subsystems can be described by different temperatures during deformation. We use results from the preceding paper on the nonequilibrium thermodynamics of systems with internal degrees of freedom to derive an equation of motion for the effective temperature and to learn how this temperature couples to the dynamics of the system as a whole.

  • Received 9 March 2009

DOI:https://doi.org/10.1103/PhysRevE.80.031132

©2009 American Physical Society

Authors & Affiliations

Eran Bouchbinder

  • Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel

J. S. Langer

  • Department of Physics, University of California, Santa Barbara, California 93106-9530, USA

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Issue

Vol. 80, Iss. 3 — September 2009

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