Meshless method for numerical simulation of crack propagation in earth dams
ZHANG Yan 1 2, WANG Jianguo 2, ZHANG Bingyin 1, LI Quanming 3
1.State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China 2.Centre for Protective Technology National University of Singapore Singapore 119260 Singapore 3.China Academy of Safety Science Technology Beijing 100029 China
Abstract：Based on the brittle fracture model of compacted cohesive soil in tensile stress and the smeared cracking theory,a point interpolation meshless method is proposed for a 2D simulation of crack propagation in earth dams.For a plane strain problem,the anisotropic stiffness matrix at each integration point is constructed for post-tensile failure zones.Then a meshless method is proposed for the brittle fracture in compacted cohesive soil.The nodes in the tensile stress zone are automatically refined and the influence domain of a node is defined according to the visibility criterion of a crack barrier.The minimal space between nodes is used as cracking step.This meshless method is applied to the simulation of three centrifuge model tests on crack propagation in an earth dam.The simulation results show that the combination of brittle fracture model and meshless algorithms is able to capture the initiation and propagation of cracks induced by tensile failure.
张琰；王建国；张丙印；李全明；. 土坝裂缝开展的无单元法数值模拟[J]. 岩土工程学报, 2009, 31(5): 727-731.
ZHANG Yan 1 2, WANG Jianguo 2, ZHANG Bingyin 1, LI Quanming 3. Meshless method for numerical simulation of crack propagation in earth dams. Chinese J. Geot. Eng., 2009, 31(5): 727-731.
