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Level set splitting in DEM for modeling breakage mechanics

Harmon, John M. and Arthur, Daniel and Andrade, José E. (2020) Level set splitting in DEM for modeling breakage mechanics. Computer Methods in Applied Mechanics and Engineering, 365 . Art. No. 112961. ISSN 0045-7825.

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Brittle breakage of particles in granular materials has often been modeled using the discrete element method (DEM). DEM is often limited however in its ability to capture particle shape, particularly when used for breakage. This paper presents the first brittle breakage technique where level set functions will allow for the description of arbitrary shape for both particles and fracture surfaces. The breakage model to be described here uses fracture surfaces defined by level sets to take advantage of simple intersection and difference set operations to split particles in both two and three dimensions. We show how this method is implemented and how we can use it to define and apply arbitrary fracture surface shapes. We then give qualitative examples of using the method in both simple and exotic ways. Finally, we model oedometric tests and rock crushing, both very common uses for previous DEM breakage techniques, to present a validation that the method captures the physics of the problem.

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Additional Information:© 2020 Elsevier B.V. Received 19 August 2019, Revised 20 February 2020, Accepted 22 February 2020, Available online 25 March 2020. This work was supported by a NASA Space Technology Research Fellowship, Grant No. 80NSSC19K1160. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Subject Keywords:Breakage; DEM; Level Set; Geomechanics
Record Number:CaltechAUTHORS:20200325-123343396
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Official Citation:John M. Harmon, Daniel Arthur, José E. Andrade, Level set splitting in DEM for modeling breakage mechanics, Computer Methods in Applied Mechanics and Engineering, Volume 365, 2020, 112961, ISSN 0045-7825, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:102106
Deposited By: Tony Diaz
Deposited On:25 Mar 2020 19:37
Last Modified:25 Mar 2020 19:37

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