Unified description of aging and rate effects in yield of glassy solids.

@article{Rottler2005UnifiedDO,
  title={Unified description of aging and rate effects in yield of glassy solids.},
  author={J{\"o}rg Rottler and Mark O. Robbins},
  journal={Physical review letters},
  year={2005},
  volume={95 22},
  pages={
          225504
        }
}
The competing effects of slow structural relaxations (aging) and deformation at constant strain rate on the shear yield stress tau(y) of simple model glasses are examined using molecular simulations. At long times, aging leads to a logarithmic increase in density and tau(y). The yield stress also rises logarithmically with rate but shows a sharp transition in slope at a rate that decreases with increasing age. We present a simple phenomenological model that includes both intrinsic rate… Expand

Topics from this paper

Heterogeneous dynamics during yielding of glasses: Effect of aging
Molecular dynamics computer simulations of a binary Lennard–Jones glass under shear are presented. The mechanical response of glassy states having different thermal histories is investigated byExpand
Deformation, yield and ageing in glassy solids
Abstract.A brief review of molecular simulations of physical ageing in structural glasses and its influence on their mechanical properties is presented. Recent studies based on simple molecularExpand
Nonlinear stress relaxation behavior of ductile polymer glasses from large extension and compression
Abstract We study nonlinear stress relaxation behavior of several polymer glasses during ductile large deformation of either extension or compression over a wide range of deformation rate at roomExpand
Aging and rejuvenation during elastostatic loading of amorphous alloys: A molecular dynamics simulation study
Abstract Using molecular dynamics simulations, we investigate the effect of uniaxial elastostatic compression on the potential energy, structural relaxation, and mechanical properties of binaryExpand
Brittle yielding of amorphous solids at finite shear rates
Amorphous solids display a ductile to brittle transition as the kinetic stability of the quiescent glass is increased, which leads to a material failure controlled by the sudden emergence of aExpand
Deformation-induced accelerated dynamics in polymer glasses.
TLDR
The dynamics can be accelerated by several orders of magnitude during deformation, and the history dependence is entirely erased during yield (mechanical rejuvenation), and aging can be explained as a result of the long tails in the relaxation time distribution of the glass. Expand
Modification of the ageing dynamics of glassy polymers due to a temperature step
Molecular dynamics simulations are used to investigate the connection between thermal history and physical ageing in polymer glasses, in particular the effects of a temperature square step.Expand
Weak nonlinearities in viscoelastic mechanical properties of polymers near their glass transition: Local versus macroscopic laws for stress-induced acceleration of the mechanical response
We focus on the role of dynamical heterogeneities on the weak mechanical nonlinearities of amorphous polymers near and above the glass transition temperature Tg by combining experiments and numericalExpand
Mechanical properties and local mobility of atactic-polystyrene films under constant-shear deformation.
TLDR
It was observed that under constant-shear deformation the polymer glass is deformed non-affinely,meaning that the middle part of the film is much more deformed than the layers close to the supporting substrates, meaning that the well-known effect of shear-banding occurs. Expand
Theory of Yielding, Strain Softening, and Steady Plastic Flow in Polymer Glasses under Constant Strain Rate Deformation
The nonlinear Langevin equation theory of segmental relaxation, elasticity, and nonlinear mechanical response of deformed polymer glasses with aging and mechanical rejuvenation processes taken intoExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 29 REFERENCES
Shear yielding of amorphous glassy solids: effect of temperature and strain rate.
  • J. Rottler, M. Robbins
  • Materials Science, Medicine
  • Physical review. E, Statistical, nonlinear, and soft matter physics
  • 2003
TLDR
Shear yielding and steady state flow of glassy materials with molecular dynamics simulations of two standard models: amorphous polymers and bidisperse Lennard-Jones glasses show that rate dependence is nearly independent of temperature. Expand
Yield conditions for deformation of amorphous polymer glasses.
  • J. Rottler, M. Robbins
  • Materials Science, Physics
  • Physical review. E, Statistical, nonlinear, and soft matter physics
  • 2001
TLDR
This work test the onset of shear is consistent with the pressure-modified von Mises criterion, and the pressure coefficient is nearly independent of many parameters under triaxial loading conditions that are difficult to realize in experiments. Expand
Atomistic simulation of aging and rejuvenation in glasses
TLDR
Slow structural relaxation observed in many atomic, molecular, and polymeric glasses substantially alters their stress-strain relations and can produce a distinctive yield point and is observed for the first time in an atomistic model system. Expand
A study of the static yield stress in a binary Lennard-Jones glass.
TLDR
The stress at the yield point (the "peak"-value of the stress-strain curve) exhibits a logarithmic dependence both on the imposed shear rate and on the "age" of the system in qualitative agreement with experiments on amorphous polymers, and on metallic glasses. Expand
Aging Effects in a Lennard-Jones Glass
Using molecular dynamics simulations we study the out of equilibrium dynamic correlations in a model glass-forming liquid. The system is quenched from a high temperature to a temperature below itsExpand
Thermal effects in the shear-transformation-zone theory of amorphous plasticity: comparisons to metallic glass data.
TLDR
This work explains the apparent onset of superplasticity at sufficiently high stress as a transition between creep at low stresses and plastic flow near the yield stress, and argues that there are internal inconsistencies in the conventional theories of these deformation processes. Expand
Aging and rheology in soft materials
We study theoretically the role of aging in the rheology of soft materials. We define several generalized rheological response functions suited to aging samples (in which time translation invarianceExpand
Macroscopic friction laws and shear yielding of glassy solids
TLDR
Molecular simulations of yield in models of glassy polymers and amorphous metals are used to test classic yield criteria, and the connection between thin film results and macroscopic friction laws is discussed. Expand
Strain softening, yielding, and shear thinning in glassy colloidal suspensions.
  • V. Kobelev, K. Schweizer
  • Materials Science, Medicine
  • Physical review. E, Statistical, nonlinear, and soft matter physics
  • 2005
TLDR
A microscopic theory for the dependence on external strain, stress, and shear rate of the transient localization length, elastic modulus, alpha relaxation time, shear viscosity, and other dynamic properties of glassy colloidal suspensions is formulated and numerically applied and generalizable to treat nonlinear rheological phenomena in other soft glassy complex fluids. Expand
Ageing and Rheology in Soft Materials
We study theoretically the role of ageing in the rheology of soft materials. We deene several generalized rheological response functions suited to ageing samples (in which time translation invarianceExpand
...
1
2
3
...