A direct fragmentation method with Weibull function distribution of sizes based on finite- and discrete element simulations

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Title: A direct fragmentation method with Weibull function distribution of sizes based on finite- and discrete element simulations
Authors: Paluszny, A
Tang, XH
Nejati, M
Zimmerman, RW
Item Type: Journal Article
Abstract: A direct method is proposed to rapidly fragment bodies during impulse-based discrete element method simulations of multiple body interactions. The approach makes use of patterns and size distributions obtained both from experiments, and from numerical models that rigorously compute fragmentation by growing fractures explicitly. Weibull parameters approximate the fragment size distributions as a function of body size and relative contact velocity. Structured domain decomposition is applied on the colliding bodies directly, resulting in a low-cost fragmentation calculation that depends on relative velocity, but which does not require the computation of fracture growth nor explicit element de-bonding, but instead classifies pre-existing mesh elements into the newly fragmented sub-domains. The method is applied to the fragmentation of a single spherical rock fragment, to an irregularly shaped rock fragment, and to the crushing of an array of spherical rock fragments.
Issue Date: 26-Oct-2015
Date of Acceptance: 17-Oct-2015
URI: http://hdl.handle.net/10044/1/50735
DOI: https://dx.doi.org/10.1016/j.ijsolstr.2015.10.019
ISSN: 0020-7683
Publisher: Elsevier
Start Page: 38
End Page: 51
Journal / Book Title: International Journal of Solids and Structures
Volume: 80
Copyright Statement: © 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords: Science & Technology
Technology
Mechanics
Discrete element method
Fragmentation
Weibull distribution
Fracture pattern
Finite element
Impulse
ONE-DIMENSIONAL COMPRESSION
IMPACT BREAKAGE
DYNAMIC FRAGMENTATION
PARTICLE BREAKAGE
NUMERICAL SIMULATIONS
COLLISION RESOLUTION
SPHERICAL-PARTICLES
BRITTLE SPHERES
HIGH-PRESSURES
GLASS SPHERES
09 Engineering
Mechanical Engineering & Transports
Publication Status: Published
Appears in Collections:Faculty of Engineering
Earth Science and Engineering



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