Research on the Failure Process of Rocks under Tensile Loading Using Elasto-Plastic CA Model

Peng Zhi Pan; Xia Ting Feng; Hui Zhou

doi:10.4028/www.scientific.net/KEM.340-341.1145

Paper Titles

Experimental Study on Mechanical Property of Steel Reinforced Concrete Short Columns of T-Shaped
p.1121

Elastoplastic Damage Modelling and Failure Analysis of Concrete in Compression
p.1127

Coupling Analysis between Stress Induced Anisotropic Damage and Permeability Variation in Brittle Rocks
p.1133

Seismic Performance of a Reinforced Lightweight Aggregate Concrete Frame
p.1139

Research on the Failure Process of Rocks under Tensile Loading Using Elasto-Plastic CA Model
p.1145

Experimental Study on Elastic-Plastic Behavior of a Sandstone under Ground Temperature
p.1151

Statistical Analysis on Strength of Rock Based on YAI Concept
p.1157

Genetic Analysis of Concrete Crack in Hydroelectric Station's Plant Based on FEM
p.1163

Study on the Mechanical Property and the Evolutionary Neural Network Constitutive Model for Limestone under Chemical Corrosive Environments
p.1169

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Research on the Failure Process of Rocks under Tensile Loading Using Elasto-Plastic CA Model

Abstract:

A series of numerical experiments are conducted by the Elasto-Plastic CA model, which was successfully used to simulate the rock failure process under uniaxial compression in previous work by the authors, to obtain the failure processes of heterogeneous rocks as well as the stress-strain relation and strain-AE relation under tensile loading at meso level. The model can consider the heterogeneity of the materials conveniently, and has the advantages of localization, parallelization etc. By constructing some local simple rules, the model can perfectly simulate the self-organization process of rock failure process. In this paper, the domain is discretized into the system composed of cell elements which are assumed to conform to the constitutive laws of elasto-brittle-plasticity. The Weibull’s stochastic distribution is introduced to represent the heterogeneity of rock materials, and Mohr-Columb criterion with tension cut-off is considered as the yield criterion. The process of crack initiation, propagation and coalescence is well simulated and the results obtained reproduce the main features known of rock behavior, both at meso and overall stress-strain levels.