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3D mode discrete element method with the elastoplastic model

Wei HU, Feng JIN, Chong ZHANG, Jinting WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1,   Pages 57-68 doi: 10.1007/s11709-012-0139-9

Abstract: The three-dimensional mode-deformable discrete element method (3MDEM) is an extended distinct element approach under the assumptions of small strain, finite displacement, and finite rotation of blocks. The deformation of blocks is expressed by the combination of the deformation modes in 3MDEM. In this paper, the elastoplastic constitutive relationship of blocks is implemented on the 3MDEM platform to simulate the integrated process from elasticity to plasticity and finally to fracture. To overcome the shortcomings of the conventional criterion for contact fracturing, a new criterion based on plastic strain is introduced. This approach is verified by two numerical examples. Finally, a cantilever beam is simulated as a comprehensive case study, which went through elastic, elastoplastic, and discontinuous fracture stages.

Keywords: mode discrete element method     elastoplastic     numerical method     discontinuum     contact    

Exploring Eco-Hydraulic Engineering

Dong Zheren

Strategic Study of CAE 2007, Volume 9, Issue 1,   Pages 1-7

Abstract:

The dependence on rivers of both humans and ecosystems is high,and humans should share water resources with ecosystems.Hydraulic engineering is one of the stress factors to river ecosystem.It is required toestablish new rules and develop new techniques,so as to enable the consideration of the requirement of thehealth and sustainability of river ecosystem while carrying on hydraulic engineering to meet human demands,thus establishing an ecological friendly hydraulic engineering technical system.

Keywords: ecology     hydraulic engineering     stress     discontinuum     heterogeneity     feedback design    

Title Author Date Type Operation

3D mode discrete element method with the elastoplastic model

Wei HU, Feng JIN, Chong ZHANG, Jinting WANG

Journal Article

Exploring Eco-Hydraulic Engineering

Dong Zheren

Journal Article