Shear yielding of amorphous glassy solids: Effect of temperature and strain rate

Abstract

We study shear yielding and steady state flow of glassy materials with molecular dynamics simulations of two standard models: amorphous polymers and bidisperse Lennard-Jones glasses. For a fixed strain rate, the maximum shear yield stress and the steady state flow stress in simple shear both drop linearly with increasing temperature. The dependence on strain rate can be described by a either a logarithm or a power-law added to a constant. In marked contrast to predictions of traditional thermal activation models, the rate dependence is nearly independent of temperature. The relation to more recent models of plastic deformation and glassy rheology is discussed, and the dynamics of particles and stress in small regions is examined in light of these findings.

References in corpus (21)

• Testing Mode-Coupling Theory for a Supercooled Binary Lennard-Jones Mixture I: The van Hove Correlation Function
• Rheology of Soft Glassy Materials
• Dynamical heterogeneities in a supercooled Lennard-Jones liquid
• Rheological constitutive equation for model of soft glassy materials
• Testing Mode-Coupling Theory for a Supercooled Binary Lennard-Jones Mixture II: Intermediate Scattering Function and Dynamic Susceptibility
• Models of traps and glass phenomenology
• Dynamics of Highly Supercooled Liquids:Heterogeneity, Rheology, and Diffusion
• Ageing and Rheology in Soft Materials
• Nonequilibrium dynamics and fluctuation-dissipation relation in a sheared fluid
• Molecular Dynamics Simulations of the Thermal Glass Transition in Polymer Melts: Alpha-Relaxation Behaviour
• Aging Effects in a Lennard-Jones Glass
• What is the Entanglement Length in a Polymer Melt ?
• Two-time scales, two-temperature scenario for nonlinear rheology
• Shear localization in a model glass
• Effective Temperatures of a Driven System Near Jamming
• Burst avalanches in solvable models of fibrous materials
• Shearing a Glassy Material: Numerical Tests of Nonequilibrium Mode-Coupling Approaches and Experimental Proposals
• Yield conditions for deformation of amorphous polymer glasses
• Rearrangements and Dilatancy for Sheared Dense Materials
• Fluctuation-dissipation relation in a sheared fluid
• Microstructural Shear Localization in Plastic Deformation of Amorphous Solids

Cited by in corpus (55)

• Amorphous Systems in Athermal, Quasistatic Shear
• Molecular dynamics simulations of glassy polymers
• Local elasticity map and plasticity in a model Lennard-Jones glass
• Modeling the mechanics of amorphous solids at different length and time scales
• Subextensive Scaling in the Athermal, Quasistatic Limit of Amorphous Matter in Plastic Shear Flow
• Plastic Response of a 2D Lennard-Jones amorphous solid: Detailed analysis of the local rearrangements at very slow strain-rate
• A study of the static yield stress in a binary Lennard-Jones glass
• Stress overshoot in a simple yield stress fluid: an extensive study combining rheology and velocimetry
• Strain Hardening in Polymer Glasses: Limitations of Network Models
• Strain Hardening of Polymer Glasses: Entanglements, Energetics, and Plasticity
• Unified Description of Aging and Rate Effects in Yield of Glassy Solids
• Thermoreversible Associating Polymer Networks: I. Interplay of Thermodynamics, Chemical Kinetics, and Polymer Physics
• From Equilibrium to Steady State: The Transient Dynamics of Colloidal Liquids under Shear
• Tensile Fracture of Welded Polymer Interfaces: Miscibility, Entanglements and Crazing
• Healing of polymer interfaces: Interfacial dynamics, entanglements, and strength
• Measurement of segmental mobility during constant strain rate deformation of a poly(methyl methacrylate) glass
• Energy Barrier Scalings in Driven Systems
• Simulations of aging and plastic deformation in polymer glasses
• Strain localization and anisotropic correlations in a mesoscopic model of amorphous plasticity
• Measurements of the Yield Stress in Frictionless Granular Systems
• Start-up Shear of Concentrated Colloidal Hard Spheres: Stresses, Dynamics and Structure
• Distribution of local relaxation events in an aging 3D glass: spatio-temporal correlation and dynamical heterogeneity
• Structure and Strength at Immiscible Polymer Interfaces
• On the study of local stress rearrangements during quasistatic plastic shear of a model glass: do local stress components contain enough information?
• A Multiscale Multisurface Constitutive Model for The Thermo-Plastic Behavior of Polyethylene
• Scaling of the Strain Hardening Modulus of Glassy Polymers with the Flow Stress
• Evolution of displacements and strains in sheared amorphous solids
• Capillary Adhesion at the Nanometer Scale
• Deformation-induced accelerated dynamics in polymer glasses
• Driven activation versus thermal activation
• Stress Overshoots in Simple Yield Stress Fluids
• Nanocapillary adhesion between parallel plates
• Strain hardening in bidisperse polymer glasses: Separating the roles of chain orientation and interchain entanglement
• Crazing of Nanocomposites with Polymer-Tethered Nanoparticles
• Boundary lubrication with a glassy interface
• Viscoplasticity and large-scale chain relaxation in glassy-polymeric strain hardening
• Elasticity in Amorphous Solids: Nonlinear or Piece-Wise Linear?
• Criticality and Scaling Relations in a Sheared Granular Material
• Emergence and persistence of flow inhomogeneities in the yielding and fluidization of dense soft solids
• Velocity Profiles in Repulsive Athermal Systems under Shear
• Nonmonotonic dependence of polymer glass mechanical response on chain bending stiffness
• Crystallization of amorphous silicon induced by mechanical shear deformations
• Rheological similarities between dense self-propelled and sheared particulate systems
• Particle rearrangement and softening contributions to the nonlinear mechanical response of glasses
• From Equilibrium to Steady-State Dynamics after Switch-On of Shear
• Morphology of Critically-Sized Crystalline Nuclei at Shear-Induced Crystal Nucleation in Amorphous Solid
• Amorphous silicon under mechanical shear deformations: shear velocity and temperature effects
• Timescale bridging in atomistic simulations of epoxy polymer mechanics using non-affine deformation theory
• Molecular mobility in driven monomeric and polymeric glasses
• Nonlinear mechanics of thermoreversibly associating dendrimer glasses
• Isomorph invariance of dynamics of sheared glassy systems
• Intrinsic vulnerabilities to mechanical failure in nanoscale films
• Yielding of a Model Glassformer: an Interpretation with an Effective System of Icosahedra
• Nonequilibrium plastic roughening of metallic glasses yields self-affine topographies with strain-rate and temperature-dependent scaling exponents
• Simple generic picture of toughness in solid polymer blends