Instytut Budownictwa Wodnego
Polskiej Akademii Nauk

Essay #9193 details

database id9193
titleContact force network evolution in active earth pressure state of granular materials: photo‑elastic tests and DEM
authorsLeśniewska D.1, Nitka M.2, Tejchman J.2, Pietrzak M.3
pages71-1 — 71-31
full text link
keywordsGranular material, Photo-elasticity, Discrete element method, Digital image processing, Force network localization, Redundancy factor, Experimental testing
abstractsThe paper deals with a quasi-static behaviour of cohesion-less granular material in active earth pressure state. Photo-elastic model tests on a rigid wall, translating out of the granular material, are analyzed. Grain crushing tests are used to estimate the range of contact forces during the model tests. Substitute granular material (low optical sensitivity glass granules) is employed. The focus is on the evolution of contact force network with deformation of granular material. The model tests are simulated using the discrete element method (DEM) to compare physical and numerical full-field force network structure and the maximum/minimum stress level. The same model geometry, loading scheme and grain size distribution, as in the model tests, are accepted in DEM simulations, although only a single layer of grains is modelled. DEM model correctly predicts the overall structure of the force network and its characteristic features, including localization. It also gives the stress level close to the experimental one and properly identifies the areas of phase transitions.
attributes [reviewed] [scientific]
database id9192
seriesGranular Matter


  ul. Kościerska 7, 80–328 Gdańsk, POLSKA

   (+48)58-552-3903, fax (+48)58-552-4211

Copyright © 2018, IBW PAN w Gdańsku