Athermal creep deformation of ultrastable amorphous solids
arXiv:2501.17952 · doi:10.21468/SciPostPhys.19.4.092
Abstract
We numerically investigate the athermal creep deformation of amorphous materials having a wide range of stability. The imposed shear stress serves as the control parameter, allowing us to examine the time-dependent transient response through both the macroscopic strain and microscopic observables. Least stable samples exhibit monotonicity in the transient strain rate versus time, while more stable samples display a pronounced non-monotonic S-shaped curve, corresponding to failure by sharp shear band formation. We identify a diverging timescale associated with the fluidization process and extract the corresponding critical exponents. Our results are compared with predictions from existing scaling theories relevant to soft matter systems. The numerical findings for stable, brittle-like materials represent a challenge for theoretical descriptions. We monitor the microscopic initiation of shear bands during creep responses. Our study encompasses creep deformation across a variety of materials ranging from ductile soft matter to brittle metallic and oxide glasses, all within the same numerical framework.
References in corpus (43)
- Yield Stress Materials in Soft Condensed Matter
- Deformation and Failure of Amorphous Solidlike Materials
- Models and algorithms for the next generation of glass transition studies
- Modeling the mechanics of amorphous solids at different length and time scales
- A random critical point separates brittle and ductile yielding transitions in amorphous materials
- Scaling description of the yielding transition in soft amorphous solids at zero temperature
- Shear localization in a model glass
- The yielding transition in amorphous solids under oscillatory shear deformation
- A study of the static yield stress in a binary Lennard-Jones glass
- Statistical Physics of the Yielding Transition in Amorphous Solids
- From transient fluidization processes to Herschel-Bulkley behavior in simple yield stress fluids
- Criteria for shear banding in time-dependent flows of complex fluids
- Glass stability changes the nature of yielding under oscillatory shear
- Zero-temperature glass transition in two dimensions
- Microscopic origin of excess wings in relaxation spectra of supercooled liquids
- Creep and flow of glasses: strain response linked to the spatial distribution of dynamical heterogeneities
- Elasto-plastic description of brittle failure in amorphous materials
- Power-law creep and residual stresses in a carbopol microgel
- Efficient swap algorithms for molecular dynamics simulations of equilibrium supercooled liquids
- Microscopic dynamics and failure precursors of a gel under mechanical load
- Inhomogeneous shear flows in soft jammed materials with tunable attractive forces
- Measurements of the Yield Stress in Frictionless Granular Systems
- Brittle yielding of amorphous solids at finite shear rates
- Spinodals with Disorder: from Avalanches in Random Magnets to Glassy Dynamics
- Onset of flow in a confined colloidal glass under an imposed shear stress
- Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions
- Role of fluctuations in the yielding transition of two-dimensional glasses
- Unified theoretical and experimental view on transient shear banding
- Heterogeneous dynamics during yielding of glasses: effect of aging
- An elasto-plastic approach based on microscopic insights for the steady state and transient dynamics of sheared disordered solids
- Mean-field scenario for the athermal creep dynamics of yield-stress fluids
- Emergence and persistence of flow inhomogeneities in the yielding and fluidization of dense soft solids
- Creep dynamics of athermal amorphous materials: a mesoscopic approach
- Scaling description of creep flow in amorphous solids
- Yielding and plasticity in amorphous solids
- Rare events and disorder control the brittle yielding of well-annealed amorphous solids
- Instantaneous Normal Modes Reveal Structural Signatures for the Herschel-Bulkley Rheology in Sheared Glasses
- Protocol dependence for avalanches under constant stress in elastoplastic models
- Mean field theory of yielding under oscillatory shear
- Mechanical Behaviour of Glasses and Amorphous Materials
- Creep response of athermal amorphous solids under imposed shear stress
- Ultra-delayed material failure via shear banding after straining an amorphous material
- Challenges in the rheology of glasses