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Development of a three-dimensional grain-based combined finite-discrete element method to model the failure process of fine-grained sandstones
Citation
Yahaghi, J and Liu, H and Chan, A and Fukuda, D, Development of a three-dimensional grain-based combined finite-discrete element method to model the failure process of fine-grained sandstones, Computers and Geotechnics, 153 Article 105065. ISSN 0266-352X (2022) [Refereed Article]
Copyright Statement
© 2022 Elsevier Ltd. All rights reserved.
DOI: doi:10.1016/j.compgeo.2022.105065
Abstract
This paper introduces a novel three-dimensional grain-based hybrid finite-discrete element method parallelized
based on general-purpose graphic processing units (GPGPUs) and applies it to investigate the failure process of
sedimentary fine-grained sandstones. The grain-based method considers the actual microstructures of rocks with
Voronoi or grain-growth tessellations to model their failures, including transgranular, intergranular and intragranular
crack propagations. The novel semi-adaptive contact activation approach (semi-ACAA) proposed by the
authors and the efficient tetrahedron-to-point (TtoP) contact interaction algorithm developed by HOSS are
implemented to speed up grain-based modelling in addition to GPGPU parallelization. Semi-ACAA and TtoP are
approximately 2–20 times and 1.5 times faster than the brute-force contact activation approach and tetrahedronto-
triangle contact interaction algorithm, respectively, which are prevalent in the FDEM community. The grainbased
modelling elucidates that most intragranular cracks are observed in the medium- and high-strength grains
of the sandstones, while most intergranular cracks occur at the grain boundaries between low- and high-strength
grains. The transgranular cracks do not discriminate any grains on their propagating paths but propagate and
coalesce with intragranular and intergranular cracks, which results in the final failure of the sandstones.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | grain-based modelling, 3D FDEM, rock failure process, transgranular crack, fine-grained sandstone |
| Research Division: | Engineering |
| Research Group: | Civil engineering |
| Research Field: | Civil geotechnical engineering |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding knowledge |
| Objective Field: | Expanding knowledge in engineering |
| UTAS Author: | Yahaghi, J (Mr Javad Yahaghi) |
| UTAS Author: | Liu, H (Dr Hong Liu) |
| UTAS Author: | Chan, A (Professor Andrew Chan) |
| UTAS Author: | Fukuda, D (Dr Daisuke Fukuda) |
| ID Code: | 154617 |
| Year Published: | 2022 |
| Deposited By: | Engineering |
| Deposited On: | 2022-12-15 |
| Last Modified: | 2023-02-28 |
| Downloads: | 0 |
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