Microscopic Analysis of Sand Shear Band in Direct Shear Test Based on Particle Flow Theory

Yang Liu; Jie Hu; Shun Chuan Wu

doi:10.4028/www.scientific.net/AMM.170-173.83

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The Improved Soil Model of Finite Compressible Layer
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Floor Heave Controlling Technology of Deep Soft Rock Roadway
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Foundation Bearing Capacity Should Include Deformation in the Design
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The Study of the Quantity of Wave Speed in Low Strain Integrity Testing of Foundation Pile
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Microscopic Analysis of Sand Shear Band in Direct Shear Test Based on Particle Flow Theory
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Work Mechanisms of Pile Foundation in the Karst Region
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Research on Deformation Prediction of Foundation Pit Braced by Complicate Soil Nailing
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Study on Model of Heat and Moisture Transfer in Freezing Soil
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Reliability Analysis of the Emergency Logistics Supply Chain
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 170-173Microscopic Analysis of Sand Shear Band in Direct...

Microscopic Analysis of Sand Shear Band in Direct Shear Test Based on Particle Flow Theory

Abstract:

In order to analyze the microscopic shear mechanics behavior of sands, a numerical simulation is carried out in sand direct shear test with commercial DEM software PFC2D. By compiling FISH function, PFC2D is able to visualize principal stresses and their inclination inside the sample. In the simulation, particle rotation gradient and particle displacement vector are observed to analyze the microscopic formation mechanism of shear band. The strain and deformation is concentrated in a band whose thickness is about 10 times of average particle diameter and the band is close to the shear plane. The porosity ratio in shear band is higher than other parts of the sample with shear process.