Strain Heterogeneity in Sheared Colloids Revealed by Neutron Scattering

Abstract

Recent computational and theoretical studies have shown that the deformation of colloidal suspensions under a steady shear is highly heterogeneous at the particle level and demonstrate a critical influence on the macroscopic deformation behavior. Despite its relevance to a wide variety of industrial applications of colloidal suspensions, scattering studies focusing on addressing the heterogeneity of the non-equilibrium colloidal structure are scarce thus far. Here, we report the first experimental result using small-angle neutron scattering. From the evolution of strain heterogeneity, we conclude that the shear-induced deformation transforms from nearly affine behavior at low shear rates, to plastic rearrangements when the shear rate is high.

References in corpus (19)

• Dynamics of Viscoplastic Deformation in Amorphous Solids
• Dynamics of Highly Supercooled Liquids:Heterogeneity, Rheology, and Diffusion
• Subextensive Scaling in the Athermal, Quasistatic Limit of Amorphous Matter in Plastic Shear Flow
• Three-dimensional imaging of colloidal glasses under steady shear
• Universal Breakdown of Elasticity at the Onset of Material Failure
• Long-range strain correlations in sheared colloidal glasses
• Avalanche Size Scaling in Sheared Three-Dimensional Amorphous Solid
• A First-Principles Constitutive Equation for Suspension Rheology
• Supercooled Liquids Under Shear: Theory and Simulation
• Elastic heterogeneity, vibrational states, and thermal conductivity across an amorphisation transition
• Long-lived neighbors determine the rheological response of glasses
• Microscopic Structural Relaxation in a Sheared Supercooled Colloidal Liquid
• Shear banding of colloidal glasses - a dynamic first order transition?
• Shear-induced anisotropic decay of correlations in hard-sphere colloidal glasses
• Correlations of plasticity in sheared glasses
• Affine and non-affine motions in sheared polydisperse jammed emulsions
• Single particle fluctuations and directional correlations in driven hard sphere glasses
• Characterization of microscopic deformation through two-point spatial correlation function
• Dynamically Correlated Region in Sheared Colloidal Glasses Revealed by Neutron Scattering