Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/61186
Title: Extension of three-dimensional discontinuous deformation analysis to frictional-cohesive materials
Authors: Zhang, H
Liu, SG
Chen, GQ
Zheng, L
Zhang, YB
Wu, YQ
Jing, PD
Wang, W
Han, Z
Zhong, GH
Lou, S
Keywords: 3-D DDA
Contact theory
Critical stability
Entrance plane
Failure mode
Joint cohesion
Issue Date: 2016
Publisher: Pergamon Press
Source: International journal of rock mechanics and mining sciences, 2016, v. 86, p. 65-79 How to cite?
Journal: International journal of rock mechanics and mining sciences 
Abstract: This paper extends three-dimensional discontinuous deformation analysis (3-D DDA) to model the frictional-cohesive failure behavior of geotechnical materials and structures. Firstly, a new contact detection scheme was developed to successfully identify the dominant sub-contacts and areas of the joints between arbitrarily shaped polyhedral blocks. Secondly, a modified joint contact model subjected to the Mohr-Coulomb failure criteria based on distributed cohesion instead of concentrated cohesion, was proposed to ensure the accuracy of the simulation by 3-D DDA. Thirdly, the extended 3-D DDA was verified by three examples, including joint contact detection, critical stability and failure mode of a system of polyhedral blocks. Finally, the complete failure process involving large displacement and rotation of multiple interaction blocks is exhibited dynamically. Overall, these examples exhibit that the extended 3-D DDA is now capable of accurately modeling the failure behavior of frictional-cohesive materials and structures, so as to optimize the material and structure stabilization or protection design.
URI: http://hdl.handle.net/10397/61186
ISSN: 1365-1609
EISSN: 1873-4545
DOI: 10.1016/j.ijrmms.2016.03.021
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