TY - JOUR
T1 - Transmission of stresses in static and sheared granular beds
T2 - The influence of particle size, shearing rate, layer thickness and sensor size
AU - Kheiripour Langroudi, M.
AU - Sun, J.
AU - Sundaresan, Sankaran
AU - Tardos, G. I.
N1 - Funding Information:
The authors wish to thank Merck and Co. Inc. for donation of the tablet press, Nova Chemicals Inc. and especially Mr. John Bailey for providing particles for testing in the Particle Technology Laboratory at CCNY. We also acknowledge the helpful discussions on the subject of powder flows with Dr. James Michaels of Merck and Co. Inc. and Dr. Paul Mort of the Proctor & Gamble Company. This work was supported by a DOE-UCR grant DE-FG26-07NT43070 .
PY - 2010/10
Y1 - 2010/10
N2 - The spatial non-uniformities and temporal fluctuations in the normal stress transmitted across a sheared granular layer have been studied through a combination of experiments in a Jenike shear cell equipped with normal force (stress) transducers imbedded on the bottom shearing surface and discrete element method (DEM) simulations. Experiments were carried out with particles of different sizes and layers of different thicknesses; the normal stress was measured at several different shearing rates and at several positions on the bottom surface. The DEM simulations revealed a direct link between the spatial inhomogeneities and temporal fluctuations in the stress recorded in our measurements. We found that the dependence of the average normal stress on the bottom surface as a function of height mirrored that in Janssen's analysis of stresses in wall-bounded static assemblies.
AB - The spatial non-uniformities and temporal fluctuations in the normal stress transmitted across a sheared granular layer have been studied through a combination of experiments in a Jenike shear cell equipped with normal force (stress) transducers imbedded on the bottom shearing surface and discrete element method (DEM) simulations. Experiments were carried out with particles of different sizes and layers of different thicknesses; the normal stress was measured at several different shearing rates and at several positions on the bottom surface. The DEM simulations revealed a direct link between the spatial inhomogeneities and temporal fluctuations in the stress recorded in our measurements. We found that the dependence of the average normal stress on the bottom surface as a function of height mirrored that in Janssen's analysis of stresses in wall-bounded static assemblies.
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U2 - 10.1016/j.powtec.2010.03.028
DO - 10.1016/j.powtec.2010.03.028
M3 - Article
AN - SCOPUS:77954624690
SN - 0032-5910
VL - 203
SP - 23
EP - 32
JO - Powder Technology
JF - Powder Technology
IS - 1
ER -