Abstract
The history dependence of glasses formed from flow-melted steady states by a sudden cessation of the shear rate is studied in colloidal suspensions, by molecular dynamics simulations and by mode-coupling theory. In an ideal glass, stresses relax only partially, leaving behind a finite persistent residual stress. For intermediate times, relaxation curves scale as a function of , even though no flow is present. The macroscopic stress evolution is connected to a length scale of residual liquefaction displayed by microscopic mean-squared displacements. The theory describes this history dependence of glasses sharing the same thermodynamic state variables but differing static properties.
- Received 18 February 2013
DOI:https://doi.org/10.1103/PhysRevLett.110.215701
© 2013 American Physical Society
Focus
Controlling Persistent Stress in Glass
Published 24 May 2013
Internal stress in a glass material is an important source of strength. Theory and experiments provide a new molecular-scale understanding of the process by which such stress develops.
See more in Physics