Time-aging time-stress superposition in soft glass under tensile deformation field
arXiv:1006.2008 · doi:10.1007/s00397-010-0469-2
Abstract
We have studied the tensile deformation behaviour of thin films of aging aqueous suspension of Laponite, a model soft glassy material, when subjected to a creep flow field generated by a constant engineering normal stress. Aqueous suspension of Laponite demonstrates aging behaviour wherein it undergoes time dependent enhancement of its elastic modulus as well as its characteristic relaxation time. However, under application of the normal stress, the rate of aging decreases and in the limit of high stress, the aging stops with the suspension now undergoing a plastic deformation. Overall, it is observed that the aging that occurs over short creep times at small normal stresses is same as the aging that occurs over long creep times at large normal stresses. This observation allows us to suggest an aging time - process time - normal stress superposition principle, which can predict rheological behaviour at longer times by carrying out short time tests.
26 pages, 7 figures, To appear in Rheologica Acta
References in corpus (16)
- Rheology of Soft Glassy Materials
- Rheological constitutive equation for model of soft glassy materials
- Ageing and Rheology in Soft Materials
- Slow dynamics in glassy soft matter
- Evolution of particle-scale dynamics in an aging clay suspension
- Multiple nonergodic disordered states in Laponite suspensions: a phase diagram
- Full Aging in Spin Glasses
- Irreversible Aging Dynamics and Generic Phase Behavior of Aqueous Suspensions of Laponite
- Slow dynamics, aging, and glassy rheology in soft and living matter
- Aging in a Colloidal Glass in Creep Flow: Time-Stress Superposition
- A model for cage formation in colloidal suspension of laponite
- Effect of temperature on aging and time-temperature superposition in nonergodic Laponite suspensions
- Aging under Shear: Structural Relaxation of a Non-Newtonian Fluid
- Origin of `end of aging' and sub-aging scaling behavior in glassy dynamics
- Ageing under stress and mechanical fragility of soft solids of laponite
- Surface Fluctuations of an Aging Colloidal Suspension: Evidence for Intermittent Quakes
Cited by in corpus (5)
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- Delayed Yielding in Creep, Time - Stress Superposition and Effective Time Theory for a Soft Glass
- Shear Mediated Elongational Flow and Yielding in Soft Glassy Materials
- Long Time Response of Aging Glassy Polymers
- Age dependent modes of extensional necking instability in soft glassy materials