Numerical simulation of triaxial tests on cement-treated clays using Hoek–Brown criterion

2021 ◽  
pp. 1-11
Author(s):  
A. S. Azneb ◽  
Subhadeep Banerjee ◽  
Retnamony G. Robinson
Keyword(s):  
Numerical Simulation ◽  
Triaxial Tests

Numerical Simulation of Triaxial Tests for Coarse-Grained Soil Considering the Initial Fabric of Samples Grain

2010 ◽  
Vol 143-144 ◽  
pp. 873-878
Author(s):  
Guang Jin Wang ◽  
Xiang Yun Kong ◽  
Yi Lei Gu ◽  
Chun He Yang
Keyword(s):  
Numerical Simulation ◽  
Internal Friction ◽  
Random Distribution ◽  
Friction Angle ◽  
Internal Friction Angle ◽  
Coarse Grained ◽  
Triaxial Tests ◽  
Strength Parameters ◽  
The Relationship ◽  
Coarse Grained Soil

The strength parameters of granular coarse-grained soil are the critical factor that affects the stability of ultra-high dump. The soil particles of different size have no sorting and random distribution, which leads to the initial fabric of sample grain uncontrolled in the laboratory test of coarse-grained soil, therefore, only relying on the laboratory testing is difficult to obtain the reliable strength parameters of coarse-grained soil. Based on Cellular Automata method, combining the laboratory triaxial tests of coarse-grained soil developed the HHC-CA model which generated the coarse-grained soil samples of different initial fabric of grain to characterize the heterogeneous and random distribution of coarse-grained soil grain group. Then by means of FLAC3D, conducting triaxial numerical simulation tests of coarse-grained soil and discussing the relationship between the gravel contents of samples shear band and samples and internal friction angle. Moreover, the shear strength model for different coarse-grained contents is established. Numerical simulation results indicated that the relationship between internal friction angle of coarse-grained soil and gravel contents of samples shear band were increasing function in the same size grading. According to the increasing of samples gravel contents, the internal friction angle might reduce, but the mean internal friction angle significantly increased with the increment of samples gravel contents.

Coulomb-Cam Model for Dilatancy and Work-Softening of Sand

2012 ◽  
Vol 446-449 ◽  
pp. 1602-1605
Author(s):  
Zhu Jin Jiang ◽  
Wu Jun Cai ◽  
Dao Sheng Ling
Keyword(s):  
Numerical Simulation ◽  
Triaxial Tests ◽  
Model Parameters ◽  
Strength Theory ◽  
Theoretical Derivation ◽  
Soil Material ◽  
Work Softening ◽  
Compression Deformation ◽  
Coulomb Model ◽  
Cam Model

Cambridge model gets the extensive application, which has advantages of rigorous theoretical derivation and model parameters which can entirely be obtained by triaxial tests, while it has deficiencies of the narrow applicative scope and describing the dilatancy hardly. As the most widely used strength theory, Mohr-Coulomb model can directly represent shear strength of soil material simply, without consideration for compression deformation yet. On account of the critical state of dilatancy defined comprehensively, this paper based on the description of dilatancy combines the advantage of Cambridge model and Mohr-Coulomb strength theory, applying to compression deformation and conciseness of Mohr-coulomb model, reflecting shear deformation and puts forward an elastic-plastic model—Coulomb-Cam model. At last, this constitutive model, proved by the contrast of numerical simulation and GDS triaxial tests is of the priority in representing the dilatancy and work-softening rationally.

Assessment of the Mechanical Behaviour of Granular Media by DEM-Based True Triaxial Tests

2016 ◽  
Vol 846 ◽  
pp. 428-433
Author(s):  
J. Cabrejos-Hurtado ◽  
S. Galindo Torres ◽  
D.M. Pedroso
Keyword(s):  
Numerical Simulation ◽  
Mechanical Behaviour ◽  
Granular Media ◽  
Triaxial Tests ◽  
Granular Soils ◽  
True Triaxial Test ◽  
Virtual Sample ◽  
True Triaxial ◽  
Toyoura Sand ◽  
True Triaxial Tests

This study presents the numerical simulation of a true triaxial test by means of the discrete element method (DEM). Experimental results performed on Toyoura sand are employed as reference and the calibration methodology is explained. Physical aspects of the real soil, such as the grain size distribution and the relative density, are considered during the generation of the virtual sample. It is shown that the main aspects of the macro-mechanical behaviour of granular soils during compression loading can be fairly represented by the idealised simulations with particles.

The Numerical Simulation of the Triaxial Test of Cemented Coarse-Grained Soils

2011 ◽  
Vol 250-253 ◽  
pp. 2640-2644 ◽  
Author(s):  
Bin Xu ◽  
Wei Luo ◽  
De Gao Zou ◽  
Xian Jing Kong ◽  
Yang Zhou
Keyword(s):  
Numerical Simulation ◽  
Strain Softening ◽  
Numerical Models ◽  
Coarse Grained ◽  
Triaxial Tests ◽  
Microscopic Mechanism ◽  
Internal Factors ◽  
Soil Particles ◽  
Monotonic Load ◽  
Peak Value

Cemented coarse-grained soils have both the properties of coarse-grained soils and concrete. This paper used discrete element method (DEM) to simulate of the drained monotonic load triaxial tests of coarse-grained soils and cemented coarse-grained soils respectively, the microscopic parameters of numerical models were calibrated based on the tests. The characteristics of the cemented coarse-grained soils and the microscopic mechanism were analyzed. The results showed that, the cemented coarse-grained soils have the higher modulus and strength compared with coarse-grained with adding the 3% cement in the specimens and appear the significant strain softening after the stress reaches the peak value; the deformation of the soil particles,the friction between soil particles and the crack of the cement bond are the mainly internal factors.

Numerical simulation of triaxial tests

ce/papers ◽  
2018 ◽  
Vol 2 (2-3) ◽  
pp. 621-626
Author(s):  
K. EDIP ◽  
Vl. SHESHOV ◽  
J. BOJADJIEVA ◽  
T. KITANOVSKI ◽  
J. CHANEVA
Keyword(s):  
Numerical Simulation ◽  
Triaxial Tests

Numerical Simulation on Laboratory Triaxial Test of Composite Soil with Roots

2011 ◽  
Vol 287-290 ◽  
pp. 777-780 ◽  
Author(s):  
Yan Yan Huang ◽  
Kai Fu Liu ◽  
Yi Jun Zhu ◽  
Xin Yu Xie ◽  
Xiang Ru Yang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Constitutive Model ◽  
Triaxial Test ◽  
Good Method ◽  
Triaxial Tests ◽  
Academic Problems ◽  
Element Analysis ◽  
Strain Relationship

Numerical simulation is a good method for studying some academic problems in the engineering. Laboratory triaxial tests of composite soil were used widely in order to understand the stress-strain relationship. But the deformation of composite soil in laboratory triaxial tests is difficult to measure in some situation. Numerical simulation on laboratory triaxial test of composite soil with roots is carried out to see how the deformation of composite soil developed under the pressure on the specimen. Drucker-Prager constitutive model was used in the numerical simulation of finite element analysis. The results show that the numerical simulation of finite element method using Drucker-Prager constitutive model is suitable for studying the deformation development of composite soil with roots. The research results are important for understanding the deformation development of laboratory triaxial test of composite soil with roots.

Water uptake by substituted amylose tablets: experimentation and numerical simulation

2009 ◽  
Vol 00 (00) ◽  
pp. 090904073309027-8
Author(s):  
H.W. Wang ◽  
S. Kyriacos ◽  
L. Cartilier
Keyword(s):  
Numerical Simulation ◽  
Water Uptake
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