DEM simulation on soil creep and associated evolution of pore characteristics

Dong Hun Kang, Tae Sup Yun, Yun Man Lau, Yu Hsing Wang

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

In this study, numerical simulations using the discrete element method (DEM) were performed to examine the evolution of pore characteristics in dense and loose samples subjected to a biaxial creep test. Sliding creep between particle contacts was incorporated in the DEM simulations, which displayed similar creep behavior found in experiments. The irregularly shaped pore geometry in the soil packing was quantified with a best-fitting ellipse with the aid of the region-based method. It has been found that the initial density of soils and the deviatoric stress values under which creep starts determine unique evolution of pore space. In addition, the weak pore structures, elongated along the horizontal direction (or perpendicular to the axial loading), collapse first and ultimately only those stable pore structures, elongated along the vertical direction (or parallel to the axial loading direction), survive and then dominate the entire soil structures as creep proceeds. The pore characteristics at last become more uniform and homogenized throughout the sample, and a more stable particle arching elongated along the loading direction is gradually produced during creep.

Original languageEnglish
Pages (from-to)98-106
Number of pages9
JournalComputers and Geotechnics
Volume39
DOIs
Publication statusPublished - 2012 Jan 1

Fingerprint

discrete element method
Finite difference method
creep
Creep
Soils
simulation
soil
Pore structure
arching
ellipse
pore space
soil structure
sliding
geometry
Geometry
Computer simulation
experiment
Experiments

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Computer Science Applications

Cite this

Kang, Dong Hun ; Yun, Tae Sup ; Lau, Yun Man ; Wang, Yu Hsing. / DEM simulation on soil creep and associated evolution of pore characteristics. In: Computers and Geotechnics. 2012 ; Vol. 39. pp. 98-106.
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DEM simulation on soil creep and associated evolution of pore characteristics. / Kang, Dong Hun; Yun, Tae Sup; Lau, Yun Man; Wang, Yu Hsing.

In: Computers and Geotechnics, Vol. 39, 01.01.2012, p. 98-106.

Research output: Contribution to journalArticle

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