Stress distribution along sidewall of a granular column: Local fluctuation and global determination

Zheng Peng, Ruoru Li and Yimin Jiang

Physica A: Statistical Mechanics and its Applications, 2019, vol. 526, issue C

Abstract: Apparent mass on bottom and stress distributions along sidewall are studied experimentally for a silo prepared by pouring grains from a fixed height. Measurements of the apparent mass, a macroscopic property, are found to be deterministic and stable, reproducible for many experimental runs. The mesoscopic stress distribution, both normal and tangential to the wall, are measured with force detectors of several grain diameters. It fluctuates strongly from one experiment to another, and may also drift with time. The results show that the local fluctuations do not destroy the deterministic nature of a macroscopic property, and therefore supports a continuum mechanical description for the latter. The measured macro-scaled stresses on the silo wall do vary with preparations, indicating history effects that may be accounted for by applying the appropriate boundary conditions of the continuum mechanical theory. Statistical means of local stresses are also discussed in connection with the Janssen model.

Keywords: Granular matter; Silo; Stress distribution; Janssen model (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:526:y:2019:i:c:s0378437119304741

DOI: 10.1016/j.physa.2019.04.101

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