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A stable, implicit Time Integration Scheme for Discrete Element Method and Contact Problems in Dynamics

Lichtenheldt, Roy (2017) A stable, implicit Time Integration Scheme for Discrete Element Method and Contact Problems in Dynamics. In: Particle-based Methods - Fundamentals and Applications V, 5, pp. 297-308. International Center for Numerical Methods in Engineering (CIMNE). V International Conference on Particle-based Methods - Fundamentals and Applications, Hannover, Germany. ISBN 978-84-946909-7-6

Full text not available from this repository.

Official URL: http://congress.cimne.com/particles2017/frontal/doc/Ebook%20PARTICLES%202017.pdf

Abstract

The field of applications for Discrete Element Method is constantly growing, enabling the simulation of granular matter. However state of the art integration schemes are mostly adopted from other methods, which results in certain drawbacks in either performance and/or accuracy. The most common time integration schemes in Discrete Element Method are explicit algorithms which are conditionally stable, only. Attempts to use implicit schemes usually require evaluation of the right hand side of the equations of motion, i.e. a complete reevaluation of the neighborhood search and contact forces within predictor-corrector iterations. While both are most suitable for simulations of rapid flows, computational efficiency is sacrificed for simulations of dense granular matter. The algorithm presented in this paper is a predictor-corrector scheme using a prediction of the forces, without evaluating the right hand side, to get an implicit estimate for the next time step. This technique enables to speed up particle simulation while using considerably higher time steps. The usage of the algorithm and the correspondent time step control are shown in example problems and accuracy is verified.

Item URL in elib:https://elib.dlr.de/114515/
Document Type:Conference or Workshop Item (Speech)
Title:A stable, implicit Time Integration Scheme for Discrete Element Method and Contact Problems in Dynamics
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lichtenheldt, Royroy.lichtenheldt (at) dlr.dehttps://orcid.org/0000-0002-2539-4910
Date:September 2017
Journal or Publication Title:Particle-based Methods - Fundamentals and Applications V
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:5
Page Range:pp. 297-308
Editors:
EditorsEmail
Wriggers, P.UNSPECIFIED
Bischoff, M.UNSPECIFIED
Onate, E.UNSPECIFIED
Owen, D.R.J.UNSPECIFIED
Zohdi, T.UNSPECIFIED
Publisher:International Center for Numerical Methods in Engineering (CIMNE)
Series Name:Particle-based Methods - Fundamentals and Applications
ISBN:978-84-946909-7-6
Status:Published
Keywords:DEM, granular matter, soil mechanics, terramechanics, Integration scheme, time Integration, Dynamics, contact mechanics, implicit, regolith, solver
Event Title:V International Conference on Particle-based Methods - Fundamentals and Applications
Event Location:Hannover, Germany
Event Type:international Conference
Organizer:CIMNE
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Project Morex, R - Projekt InSight
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of System Dynamics and Control > Space System Dynamics
Deposited By: Lichtenheldt, Roy
Deposited On:16 Oct 2017 10:02
Last Modified:11 Jul 2019 13:43

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