Athermal Shear-Transformation-Zone Theory of Amorphous Plastic Deformation II: Analysis of Simulated Amorphous Silicon
arXiv:cond-mat/0611026 · doi:10.1103/PhysRevE.75.036108
Abstract
In the preceding paper, we developed an athermal shear-transformation-zone (STZ) theory of amorphous plasticity. Here we use this theory in an analysis of numerical simulations of plasticity in amorphous silicon by Demkowicz and Argon (DA). In addition to bulk mechanical properties, those authors observed internal features of their deforming system that challenge our theory in important ways. We propose a quasithermodynamic interpretation of their observations in which the effective disorder temperature, generated by mechanical deformation well below the glass temperature, governs the behavior of other state variables that fall in and out of equilibrium with it. Our analysis points to a limitation of either the step-strain procedure used by DA in their simulations, or the STZ theory in its ability to describe rapid transients in stress-strain curves, or perhaps to both. Once we allow for this limitation, we are able to bring our theoretical predictions into accurate agreement with the simulations.
10 pages, 7 figures, second of a two-part series. Reorganized paper with no substantial changes in content
References in corpus (2)
Cited by in corpus (32)
- Deformation and Failure of Amorphous Solidlike Materials
- Shear-transformation-zone theory of plastic deformation near the glass transition
- Strain localization in a shear transformation zone model for amorphous solids
- Onset of Irreversibility and Chaos in Amorphous Solids Under Periodic Shear
- Nonequilibrium Thermodynamics of Amorphous Materials II: Effective-Temperature Theory
- Athermal Shear-Transformation-Zone Theory of Amorphous Plastic Deformation I: Basic Principles
- Rate dependent shear bands in a shear transformation zone model of amorphous solids
- Nonequilibrium Thermodynamics of Amorphous Materials III: Shear-Transformation-Zone Plasticity
- Nonequilibrium Thermodynamics of Amorphous Materials I: Internal Degrees of Freedom and Volume Deformation
- Two-temperature continuum thermomechanics of deforming amorphous solids
- Statistical Physics of Elasto-Plastic Steady States in Amorphous Solids: Finite Temperatures and Strain Rates
- Steady-state, effective-temperature dynamics in a glassy material
- Size of Plastic Events in Strained Amorphous Solids at Finite Temperatures
- On the study of local stress rearrangements during quasistatic plastic shear of a model glass: do local stress components contain enough information?
- Direct Identification of the Glass Transition: Growing Length Scale and the Onset of Plasticity
- Linear Response Theory for Hard and Soft Glassy Materials
- Shear-Transformation-Zone Theory of Linear Glassy Dynamics
- Notch fracture toughness of glasses: Rate, age and geometry dependence
- Plasticity-Induced Anisotropy in Amorphous Solids: the Bauschinger Effect
- Variable-amplitude oscillatory shear response of amorphous materials
- Effective Temperature Dynamics in an Athermal Amorphous Plasticity Theory
- Avalanches and Structural Change in Cyclically Sheared Silica Glass
- Yielding transition of a two dimensional glass former under athermal cyclic shear deformation
- The Stability of an Expanding Circular Cavity and the Failure of Amorphous Solids
- The Effective Temperature in Elasto-Plasticity of Amorphous Solids
- A dynamical law for slow crack growth in polycarbonate films
- Free-Boundary Dynamics in Elasto-plastic Amorphous Solids: The Circular Hole Problem
- Finite-time Singularities in Surface-Diffusion Instabilities are Cured by Plasticity
- Parallel three-dimensional simulations of quasi-static elastoplastic solids
- Fronts Propagation at the Onset of Plastic Yielding
- Necking instabilities in elasto-viscoplastic materials
- Coordinate transformation methodology for simulating quasi-static elastoplastic solids