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Development of a GPGPU‐parallelized hybrid finite-discrete element method for modeling rock fracture

Citation

Fukuda, D and Mohammadnejad, M and Liu, H and Dehkhoda, S and Chan, A and Cho, S-H and Min, G-J and Han, H and Kodama, J-i and Fujii, Y, Development of a GPGPU‐parallelized hybrid finite-discrete element method for modeling rock fracture, International Journal for Numerical and Analytical Methods in Geomechanics, 43, (10) pp. 1797-1824. ISSN 1096-9853 (2019) [Refereed Article]

Copyright Statement

2019 John Wiley & Sons, Ltd.

DOI: doi:10.1002/nag.2934

Abstract

The hybrid finite‐discrete element method (FDEM) is widely used for engineering applications, which, however, is computationally expensive and needs further development, especially when rock fracture process is modeled. This study aims to further develop a sequential hybrid FDEM code formerly proposed by the authors and parallelize it using compute unified device architecture (CUDA) C/C++ on the basis of a general‐purpose graphics processing unit (GPGPU) for rock engineering applications. Because the contact detection algorithm in the sequential code is not suitable for GPGPU parallelization, a different contact detection algorithm is implemented in the GPGPU‐parallelized hybrid FDEM. Moreover, a number of new features are implemented in the hybrid FDEM code, including the local damping technique for efficient geostatic stress analysis, contact damping, contact friction, and the absorbing boundary. Then, a number of simulations with both quasi‐static and dynamic loading conditions are conducted using the GPGPU‐parallelized hybrid FDEM, and the obtained results are compared both quantitatively and qualitatively with those from either theoretical analysis or the literature to calibrate the implementations. Finally, the speed‐up performance of the hybrid FDEM is discussed in terms of its performance on various GPGPU accelerators and a comparison with the sequential code, which reveals that the GPGPU‐parallelized hybrid FDEM can run more than 128 times faster than the sequential code if it is run on appropriate GPGPU accelerators, such as the Quadro GP100. It is concluded that the GPGPU‐parallelized hybrid FDEM developed in this study is a valuable and powerful numerical tool for rock engineering applications.

Item Details

Item Type:Refereed Article
Keywords:CUDA C/C++, fracture process analysis, GPGPU, hybrid FDEM, impact loading, quasi-static loading, rocks
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:Fukuda, D (Dr Daisuke Fukuda)
UTAS Author:Mohammadnejad, M (Mr Mojtaba Mohammadnejad)
UTAS Author:Liu, H (Dr Hong Liu)
UTAS Author:Chan, A (Professor Andrew Chan)
UTAS Author:Han, H (Mr Haoyu Han)
ID Code:132338
Year Published:2019
Deposited By:Engineering
Deposited On:2019-05-03
Last Modified:2019-09-17
Downloads:0

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