Shear Thickening and Jamming of Dense Suspensions: The "Roll" of Friction.

Journal Article · Thu Jun 18 04:00:00 EDT 2020 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.124.248005· OSTI ID:1767436

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

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.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: University of Chinese Academy of Sciences (UCAS); National Institute of Standards and Technology (NIST) - Center for Hierarchical Materials Design (CHiMaD); National Science Foundation (NSF); Army Research Office
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1767436
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 124; ISSN 0031-9007
• Country of Publication: United States
• Language: English