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Effect of Box Size on Dilative Behaviour of Sand in Direct Shear Test

  • S. R. Mohapatra
  • S. R. Mishra
  • S. Nithin
  • K. Rajagopal
  • Jitendra Sharma
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 16)

Abstract

In this paper, an attempt is made to analyse the dilative behaviour of dense sand at two different sizes of the direct shear box, i.e., small (60 mm × 60 mm × 30 mm) and large (305 mm × 305 mm × 140 mm). A three-dimensional numerical model is developed using the FLAC3D software to analyse the size effect on dilative behaviour of dense sand along the top and the shear plane of the box at 15 kPa normal pressure. It is observed that the vertical deformation of soil on top plane increases linearly with horizontal displacement, whereas on shear plane, the vertical deformation remains constant after yielding of sand. It is also found that there is greater movement of sand particles at the front and the back of the box for the large shear box compared with that for the small shear box.

Keywords

Direct shear Numerical modelling FLAC Dilation Mohr–Coulomb 

Abbreviations and Notations

B

Width of the shear box

DSB

Direct shear box

H

Height of the shear box

L

Length of the shear box

MC

Mohr–Coulomb

2D

Two dimensional

3D

Three-dimensional

D50

Diameter corresponding to percentage finer than 50%

ψ

Dilation angle

ϕ

Peak friction angle

ϕcv

Friction angle at 40-mm horizontal displacement

σn

Normal pressure

τ

Peak shear stress

τ40

Shear–stress at 40-mm horizontal displacement

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • S. R. Mohapatra
    • 1
  • S. R. Mishra
    • 1
  • S. Nithin
    • 1
  • K. Rajagopal
    • 1
  • Jitendra Sharma
    • 2
  1. 1.Department of Civil EngineeringIndian Institute of Technology MadrasChennaiIndia
  2. 2.Department of Civil EngineeringYork UniversityTorontoCanada

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