University Of Tasmania

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Development and application of a GPGPU-parallelized hybrid finite-discrete element method for modelling geo-structure collapse and resultant debris flow

conference contribution
posted on 2023-05-23, 15:21 authored by Hongyuan LiuHongyuan Liu, Fukuda, D
FDEM is rarely implemented to model non-cohesive soils due to the computationally intensive costs required for contact detections and interactions of irregularly shaped non-cohesive soil particles. This study first reviews a series of authors' recent developments for speeding up the contact detections and interactions for FDEM including GPGPU-parallelization, efficient contact activation approach, mass scaling, hyperplane separation theorem, as well as the adaptive and semi-adaptive contact activation scheme. With their implementation, our GPGPU-parallelized HFDEM is about 8,000 to 61,000 times faster than sequential FDEM code, which paves the way for investigating the instability and collapse of geo-structures and resultant debris fragmentation and flow involving in a large numbers of irregular-shaped non-cohesive debris. The GPGPU-parallelized HFDEM is then implemented to investigate the collapse process of 3D irregular-shaped and non-cohesive soil heaps under gravity, and the excavation-induced slope instability as well as the resultant complex debris fragment action and flow process.


Golder Associates Pty Ltd


Publication title

Proceedings of 20th International Conference on Soil Mechanics and Geotechnical Engineering


MM Rahman & M Jaksa






School of Engineering


Australian Geomechanics Society (AGS)

Place of publication


Event title

20th International Conference on Soil Mechanics and Geotechnical Engineering

Event Venue

Sydney, Australia

Date of Event (Start Date)


Date of Event (End Date)


Rights statement

Copyright 2022 Australian Geomechanics Society

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in engineering