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Reduced Gravity Effects on the Strength of Granular Matter: DEM Simulations versus Experiments

Karapiperis, Konstantinos and Marshall, Jason P. and Andrade, José E. (2020) Reduced Gravity Effects on the Strength of Granular Matter: DEM Simulations versus Experiments. Journal of Geotechnical and Geoenvironmental Engineering, 146 (5). Art. No. 06020005. ISSN 1090-0241. https://resolver.caltech.edu/CaltechAUTHORS:20200409-071639201

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Abstract

Quantifying the effect of reduced gravity on the behavior of granular matter is essential to understanding the evolution of planetary morphology and will likely affect the design of future extraterrestrial habitats. Yet despite recent research, the effect of reduced gravity/confining pressure on strength remains undetermined, with scarce results ranging from no effect to opposing trends. In this study, we employ high-fidelity discrete element simulations (DEM) of passive failure experiments to measure the influence of gravity on the peak and steady-state friction angle, and the angle of repose of sand. The results are compared against recently reported physical experiments, lending the latter support based on micromechanical information, that is unattainable experimentally. We find that the friction angles experience a small increase with decreasing gravity, while the angle of repose remains almost constant.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1061/(asce)gt.1943-5606.0002232DOIArticle
ORCID:
AuthorORCID
Karapiperis, Konstantinos0000-0002-6796-8900
Marshall, Jason P.0000-0003-4504-9564
Additional Information:© 2020 American Society of Civil Engineers.
Subject Keywords:Friction angle; Angle of repose; Reduced gravity; Discrete element simulations (DEM); Micromechanics
Issue or Number:5
Record Number:CaltechAUTHORS:20200409-071639201
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200409-071639201
Official Citation:Reduced Gravity Effects on the Strength of Granular Matter: DEM Simulations versus Experiments. Konstantinos Karapiperis; Jason P. Marshall; and José E. Andrade; doi: 10.1061/(asce)gt.1943-5606.0002232
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:102418
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:09 Apr 2020 17:32
Last Modified:19 Nov 2020 17:50

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