Repository logo
 

A well defined glass state obtained by oscillatory shear

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Pérez-Ocampo, L 
Zaccone, A 
Laurati, M 

Abstract

We investigate the process of shear melting and re-solidification of a colloidal glass, directly after loading (pre-yielding) and after a series of consecutive strain sweeps (post-yielding). The post-yielding glass shows a significant softening compared to the pre-yielding glass, together with the absence of history effects in successive shear melting protocols, indicating a reproducible process of fluidisation and re-solidification into a glass state unaffected by residual stresses. However, a significant hysteresis characterises strain sweeps with increasing or decreasing strain amplitude. The appearance of history and hysteresis effects coincides with the formation of a glass state, whereas it is not observed in the liquid. We can describe the onset of shear melting over a broad range of volume fractions and frequencies using a recently developed model which describes the yielding process in terms of loss of long-lived nearest neighbours.

Description

Keywords

cond-mat.soft, cond-mat.soft

Journal Title

Journal of Rheology

Conference Name

Journal ISSN

0148-6055
1520-8516

Volume Title

62

Publisher

Society of Rheology