Kinematics and internal deformation of granular slopes: Insights from discrete element modeling

Zhina Liu, Hemin A. Koyi

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The kinematics and internal deformation of a failure mass during the flow-like moving off a slope were monitored and quantified with the particle flow method in this study. Two kinds of cases were investigated, noncohesive and cohesive granular slopes. Three different internal friction angles and cohesive strengths were considered to systematically investigate their effect on the kinematics and internal deformation of the failure mass. We analyzed the movement within the failure mass and concluded that the mass moves downwards in an undulating pattern. The slope surface topography changes from a straight line to curved lines with slope breaks in a convex geometry. In addition, dilatation within the failure mass, which deforms internally and heterogeneously, is strongly dependent on its mechanical properties. A larger mass moves downslope, and the mass moves faster and further in the model with lower internal friction and cohesion. The internal friction and cohesion have a positive impact on porosity and two-dimensional (or volumetric in 3D) strain within the failure mass.

Original languageBritish English
Pages (from-to)139-160
Number of pages22
JournalLandslides
Volume10
Issue number2
DOIs
StatePublished - Apr 2013

Keywords

  • Failure mass
  • Granular flow
  • Internal deformation
  • Kinematics
  • Particle flow method

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