• Articles • Previous Articles     Next Articles

DEM simulation of the shear band of sands in biaxial tests

JIANG Ming-jing1,2, LI Xiu-mei1,2   

  1. 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;  2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
  • Received:2009-09-23 Online:2010-04-16 Published:2009-09-23


Many biaxial tests of sands are simulated using PFC2D to study the formation and the development of the shear band. The relationship of stress and strain inside or outside the shear band is studied. Focus is extended to some variables such as the void ratio, the average coordination number and the pure rotation ratio inside and outside the shear band. The results show that the formation of the shear band is characterized with both strain localization and the localization of the averaged pure rotation ratio (APR). The shear band starts right at the point where the volume strain changes from shrinkage to expansion. The development of these variables are significantly different within or outside of the shear band. Particularly, the stress-strain softening relationship was observed near or within the shear band, while the hysteretic phenomenon takes place outside the shear band. In addition,  both the volumetric and deviatoric strains are larger inside than outside the shear band, with the soil being looser in the shear band.

Key words: distinct element method, shear band, sand, biaxial tests, strain-softening

[1] REN Bing, WAN Yi, WANG Guisen, WANG Teng. Influence of different acid-etching time on the surface morphology and corrosion resistance of TC4 titanium alloys after sandblasting [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2017, 47(3): 139-142.
[2] XIA Mengran, LI Wei, FENG Xiao, ZHU Guangxuan, LI Xia. Grouting reinforcement and excavation stability on super-shallow buried and water-rich sand stratum subway transverse channel [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2017, 47(2): 47-54.
[3] WU Nong, ZHANG Xiao, LI Mengtian. Research on new grouting equipment and method for the treatment of gushing water in porosity sandstone [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2015, 45(4): 64-68.
[4] YANG Jun, YANG Zhi. Experimental study on shear strength of cement-treated weathered sand under the condition of freeze-thaw cycles [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2014, 44(5): 42-48.
[5] ZHOU Qian, ZHAO Degang. Application of the horizontal jet grouting pile in water-bearing sandy layer of shallow excavating tunnel [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2014, 44(4): 52-57.
[6] ZHANG Hong-bo, MIAO Hai-tao, SONG Xiu-guang. Constitutive  model  of  silty  sands  for  cumulative  deformation  under  long-term  traffic  loading  and  numerical  integration [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2010, 40(2): 59-65.
[7] ZHANG Hong-Bo, HUANG Mao-Song, SONG Xiu-Guang. A  double hardening constitutive model for fine sands based on both the dilatancy feature and strain softening [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2008, 38(6): 55-60.
[8] HUANG Zeng-yan,WANG Guang-yue,LI Qian,ZHAO Ming . Rank evaluation of sand liquefaction based on Extenics [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2008, 38(5): 31-35 .
[9] QIU Xian-feng,ZHANG Jian,NING Wei,GAO Bao-yu,XU Chun-hua . Fe and Mn removal from groundwater by a contact oxidation process with different fillings [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2007, 37(5): 99-102 .
Full text



No Suggested Reading articles found!