TY - GEN
T1 - Large scale simulation of granular materials via impulse-based discrete element method
AU - Lee, Seung Jae
AU - Hashash, Youssef M.A.
AU - Park, Eun Hyun
N1 - Publisher Copyright:
© ASCE 2015.
PY - 2015
Y1 - 2015
N2 - The discrete element method (DEM) was developed about 35 years ago to simulate particulate interaction of granular materials. However, DEM is a computationally expensive method despite significant algorithmic developments that have been made to enhance the computational performance. In this study, a new simulation approach is proposed that runs nearly as fast as the simulation methods used in the computer graphics area while keeping the simulation fidelity required for engineering applications. The proposed impulse-based DEM (iDEM) uses collision impulse instead of contact force, and directly handles velocity while bypassing integration at the acceleration level. Contact force is not an integral part of simulation, but retrieved via an original proposed formulation. The method is robust, numerically stable and results in significant speed-up of almost two orders of magnitude relative to conventional DEM, which makes iDEM as a suitable tool for large scale simulation of granular materials.
AB - The discrete element method (DEM) was developed about 35 years ago to simulate particulate interaction of granular materials. However, DEM is a computationally expensive method despite significant algorithmic developments that have been made to enhance the computational performance. In this study, a new simulation approach is proposed that runs nearly as fast as the simulation methods used in the computer graphics area while keeping the simulation fidelity required for engineering applications. The proposed impulse-based DEM (iDEM) uses collision impulse instead of contact force, and directly handles velocity while bypassing integration at the acceleration level. Contact force is not an integral part of simulation, but retrieved via an original proposed formulation. The method is robust, numerically stable and results in significant speed-up of almost two orders of magnitude relative to conventional DEM, which makes iDEM as a suitable tool for large scale simulation of granular materials.
UR - http://www.scopus.com/inward/record.url?scp=84925203804&partnerID=8YFLogxK
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U2 - 10.1061/9780784479087.011
DO - 10.1061/9780784479087.011
M3 - Conference contribution
AN - SCOPUS:84925203804
T3 - Geotechnical Special Publication
SP - 105
EP - 114
BT - IFCEE 2015 - Proceedings of the International Foundations Congress and Equipment Expo 2015
A2 - Anderson, J. Brian
A2 - Iskander, Magued
A2 - Suleiman, Muhannad T.
A2 - Laefer, Debra F.
PB - American Society of Civil Engineers
T2 - International Foundations Congress and Equipment Expo 2015, IFCEE 2015
Y2 - 17 March 2015 through 21 March 2015
ER -