ISSN 0021-8944, Journal of Applied Mechanics and Technical Physics, 2018, Vol. 59, No. 1, pp. 153–162.
Pleiades Publishing, Ltd., 2018.
Original Russian Text
FORCE CHAIN CHARACTERISTICS AND EFFECTS OF A DENSE
GRANULAR FLOW SYSTEM IN A THIRD BODY INTERFACE
DURING THE SHEAR DILATANCY PROCESS
S. Q. Hou, W. Wang, Z. Y. Wang, Z. W. Hu, and K. Liu
Abstract: In order to investigate the characteristics of force chains in a granular ﬂow system,
a parallel plate shear cell is constructed to simulate the shear movement of an inﬁnite parallel
plate and observe variations in relevant parameters. The shear dilatancy process is divided into
three stages, namely, plastic strain, macroscopic failure, and granular recombination. The stick-
slip phenomenon is highly connected with the evolution of force chains during the shear dilatancy
process. The load–distribution rate curves and patterns of the force chains are utilized to describe the
load-carrying behaviors and morphologic changes of force chains separately. Force chains, namely,
“diagonal gridding,” “tadpole-shaped,” and “pinnate” are deﬁned according to the form of the force
chains in the corresponding three stages.
Keywords: granular ﬂow, force chains, shear dilatancy, load–distribution rate.
On the basis of the lubrication friction theory, Godet  introduced a concept of a third body, which is
understood as a set of intersurface relationships, products of surface fracture, and highly deformed surface layers of
contacting bodies. Marinack and Higgs  and Higgs and Tichy  used numerical simulations to study the inﬂuence
of the coeﬃcients of restitution and surface roughness on the velocity, temperature, and solid volume fraction proﬁle
in the Poiseuille shear ﬂow. Dougherty et al.  proposed that composite transfer ﬁlms can be crafted to combine the
low friction behavior of a powder lubricant with another powder component that oﬀers an alternative functionality,
such as electrical conductivity or oxidation control. Cain et al.  investigated stick-slip motion of an annular shear
cell and divided the stick-slip process into three stages, namely, plastic strain, macroscopic failure, and granular
recombination. Wojcik et al.  described the results of experimental investigations of a conﬁned granular ﬂow in a
silo with diﬀerent inserts; some design recommendations for silos equipped with inserts were worked out. Ghosh et
al.  simulated a two-dimensional Hertzian line contacts in the presence of a third body at the contact interface;
fretting phenomena under diﬀerent displacement amplitudes were investigated.
Zhang et al.  and Zhu et al.  found that it was the ordered commensurate surface structure of self-
assembled monolayers and the interaction between these monolayers that are responsible for periodic stick-slip
motion. They also analysed the shear distance between the upmost and downmost layers and the displacement of
the column of atoms in the slider. Shear deformation of the slider was assumed to be the main cause of stick-slip
friction [8, 9].
Institute of Tribology, Hefei University of Technology, Hefei, Anhui, 230009 China; email@example.com;
firstname.lastname@example.org; email@example.com; firstname.lastname@example.org; email@example.com. Translated from
Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 59, No. 1, pp. 178–188, January–February, 2018. Original
article submitted November 15, 2016.
2018 by Pleiades Publishing, Ltd.