From Yielding to Shear Jamming in a Cohesive Frictional Suspension

Abhinendra Singh, Sidhant Pednekar, Jaehun Chun, Morton M. Denn, and Jeffrey F. Morris

Phys. Rev. Lett. 122, 098004 – Published 7 March 2019

Abstract

Simulations are used to study the steady shear rheology of dense suspensions of frictional particles exhibiting discontinuous shear thickening and shear jamming, in which finite-range cohesive interactions result in a yield stress. We develop a constitutive model that combines yielding behavior and shear thinning at low stress with the frictional shear thickening at high stresses, in good agreement with the simulation results. This work shows that there is a distinct difference between solids below the yield stress and in the shear-jammed state, as the two occur at widely separated stress levels, with an intermediate region of stress in which the material is flowable.

Received 15 September 2018

DOI:https://doi.org/10.1103/PhysRevLett.122.098004

Physics Subject Headings (PhySH)

Granular flows Jamming Rheology Shear flows Shear thickening

Suspensions

Molecular dynamics

Polymers & Soft Matter

Authors & Affiliations

Abhinendra Singh^1,*, Sidhant Pednekar^1,2,3,†, Jaehun Chun^1,3,‡, Morton M. Denn^1,2,§, and Jeffrey F. Morris^1,2,¶

¹Benjamin Levich Institute, CUNY City College of New York, New York, New York 10031, USA
²Department of Chemical Engineering, CUNY City College of New York, New York, New York 10031, USA
³Pacific Northwest National Laboratory, Richland, Washington 99352, USA