Mechanical Properties of Glass Forming Systems

Abstract

We address the interesting temperature range of a glass forming system where the mechanical properties are intermediate between those of a liquid and a solid. We employ an efficient Monte-Carlo method to calculate the elastic moduli, and show that in this range of temperatures the moduli are finite for short times and vanish for long times, where `short' and `long' depend on the temperature. By invoking some exact results from statistical mechanics we offer an alternative method to compute shear moduli using Molecular Dynamics simulations, and compare those to the Monte-Carlo method. The final conclusion is that these systems are not "viscous fluids" in the usual sense, as their actual time-dependence concatenates solid-like materials with varying local shear moduli.

References in corpus (3)

• Crossover to Potential Energy Landscape Dominated Dynamics in a Model Glass-forming Liquid
• Geometric approach to the dynamic glass transition
• Direct Identification of the Glass Transition: Growing Length Scale and the Onset of Plasticity

Cited by in corpus (10)

• Statistical Physics of Elasto-Plastic Steady States in Amorphous Solids: Finite Temperatures and Strain Rates
• Size of Plastic Events in Strained Amorphous Solids at Finite Temperatures
• Ergodicity and Slowing Down in Glass-Forming Systems with Soft Potentials: No Finite-Temperature Singularities
• The Origin of Persistent Shear Stress in Supercooled Liquids
• Influence of inherent structure shear stress of supercooled liquids on their shear moduli
• Ageing and Relaxation in Glass Forming Systems
• Theory of Specific Heat in Glass Forming Systems
• Non-Universality of the Specific Heat in Glass Forming Systems
• Mechanical Properties and Plasticity of a Model Glass Loaded Under Stress Control
• Quantitative Theory of a Relaxation Function in a Glass-Forming System