Work

Shear Thickening and Jamming of Dense Suspensions: The “Roll” of Friction

Year: 2020

Type: article

Abstract: Particle-based simulations of discontinuous shear thickening (DST) and shear jamming (SJ) suspensions are used to study the role of stress-activated constraints, with an emphasis on resistance to gearlike rolling. Rolling friction decreases the volume fraction required for DST and SJ, in quantitative agreement with real-life suspensions with adhesive surface chemistries and "rough" particle shapes. It sets a distinct structure of the frictional force network compared to only sliding friction, and from a dynamical perspective leads to an increase in the velocity correlation length, in part responsible for the increased viscosity. The physics of rolling friction is thus a key element in achieving a comprehensive understanding of strongly shear-thickening materials.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.124.248005

Authors: Abhinendra Singh, Christopher Ness, Ryohei Seto, Juan J. de Pablo, Heinrich M. Jaeger

Institutions: University of Chicago, University of Edinburgh, Wenzhou Institute, University of Chinese Academy of Sciences, Argonne National Laboratory

Language: English

Topic: Material Dynamics and Properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green