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Type: Journal article
Title: Simulation of mixed-mode fracture using SPH particles with an embedded fracture process zone
Author: Wang, Y.
Tran, H.T.
Nguyen, G.D.
Ranjith, P.G.
Bui, H.H.
Citation: International Journal for Numerical and Analytical Methods in Geomechanics, 2020; 44(10):1417-1445
Publisher: Wiley
Issue Date: 2020
ISSN: 0363-9061
Statement of
Yingnan Wang, Hieu T. Tran, Giang D. Nguyen, Pathegama G. Ranjith, Ha H. Bui
Abstract: This paper focuses on the modelling of mixed‐mode fracture using the conventional smoothed particle hydrodynamics (SPH) method and a mixed‐mode cohesive fracture law embedded in the particles. The combination of conventional SPH and a mixed‐mode cohesive model allows capturing fracture and separation under various loading conditions efficiently. The key advantage of this framework is its capability to represent complex fracture geometries by a set of cracked SPH particles, each of which can possess its own mixed‐mode cohesive fracture with arbitrary orientations. Therefore, this can naturally capture complex fracture patterns without any predefined fracture topologies. Because a characteristic length scale related to the size of the fracture process zone is incorporated in the constitutive formulation, the proposed approach is independent from the spatial discretisation of the computational domain (or mesh independent). Furthermore, the anisotropic fracture responses of materials can be naturally captured thanks to the orientation of the fracture process zone embedded at the particle level. The performance of the proposed approach demonstrates its potentials in modelling mixed‐mode fracture of rocks and similar quasi‐brittle materials.
Keywords: Cohesive fracture law; mixed-mode; regularisation; rock fracture; smoothed particle hydrodynamics (SPH)
Rights: © 2020 John Wiley & Sons, Ltd.
DOI: 10.1002/nag.3069
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Civil and Environmental Engineering publications

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