›› 2009, Vol. 30 ›› Issue (S1): 250-254.

• Numerical Analysis • Previous Articles     Next Articles

Analysis of post-shear-instability in saturated rock

ZHANG Xu-hui1, LU Xiao-bin1, CUI Peng2   

  1. 1. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China; 2. Institute of Mountain Hazards and Environment Research, Chinese Academy of Sciences, Chengdu 610041, China
  • Received:2009-03-20 Online:2009-08-10 Published:2011-03-16

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Abstract:

There is only one shear band formed at last when the soil specimen bears shear load, although several fine shear bands appear at first. For analyzing this phenomenon, the development of shear bands in saturated rock is thought to be a multi-stage process and is numerically investigated. The evolution of shear bands from several finite amplitude disturbances (FADs) in pore pressure is studied. The numerical analysis reveals the detailed processes that the FADs evolve into a fully developed shear band. It is shown that the shear banding process consists of two stages: heterogeneous shearing process and true shear banding process.

Key words: saturated rock, simple shear, shear band, instability

CLC Number: 

  • TU 45
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