Yielding and microstructure in a 2D jammed material under shear deformation
- 30 May 2013
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Soft Matter
- Vol. 9 (27), 6222-6225
- https://doi.org/10.1039/c3sm51014j
Abstract
The question of how a disordered material's microstructure translates into macroscopic mechanical response is central to understanding and designing materials like pastes, foams and metallic glasses. Here, we examine a 2D soft jammed material under cyclic shear, imaging the structure of ∼5 × 104 particles. Below a certain strain amplitude, the structure becomes conserved at long times, while above, it continually rearranges. We identify the boundary between these regimes as a yield strain, defined without rheological measurement. Its value is consistent with a simultaneous but independent measurement of yielding by stress-controlled bulk rheometry. While there are virtually no irreversible rearrangements in the steady state below yielding, we find a largely stable population of plastic rearrangements that are reversed with each cycle. These results point to a microscopic view of mechanical properties under cyclic deformation.Other Versions
This publication has 27 references indexed in Scilit:
- Yield Stress Fluids Slowly Yield to AnalysisScience, 2009
- Shear banding, aging and noise dynamics in soft glassy materialsSoft Matter, 2008
- Reversible plastic events in amorphous materialsPhysical Review E, 2008
- Random organization in periodically driven systemsNature Physics, 2008
- Structural Rearrangements That Govern Flow in Colloidal GlassesScience, 2007
- Measuring the yield behaviour of structured fluidsJournal of Non-Newtonian Fluid Mechanics, 2004
- Rearrangements in hard-sphere glasses under oscillatory shear strainPhysical Review E, 2002
- Rejuvenation and Overaging in a Colloidal Glass under ShearPhysical Review Letters, 2002
- Colloidal glasses under shear strainPhysical Review E, 1998
- Dynamics of viscoplastic deformation in amorphous solidsPhysical Review E, 1998