›› 2017, Vol. 38 ›› Issue (S2): 1-8.doi: 10.16285/j.rsm.2017.S2.001

• Fundamental Theroy and Experimental Research •     Next Articles

Acoustic emission of sandstone under uniaxial compression and simulation of fiber bundle model

JIANG De-yi1, YUE Hao-xue1, ZHANG Xuan1, XIE Kai-nan1, JIANG Xiang1,2,3   

  1. 1. State Key Laboratory for Coal Mine Disaster Dynamics and Controls, Chongqing University, Chongqing 400044, China; 2. College of Civil Engineering, Chongqing University, Chongqing 400044, China; 3. Department of Earth Sciences, University of Cambridge, England CB2 3EQ, United Kingdom
  • Received:2016-07-22 Online:2017-11-23 Published:2018-06-05
  • Supported by:

    This work was supported by the National Science and Technology Major Projects(2016ZX05045001-005) and Fundamental and Frontier Research Project of Chongqing Science and Technology Commission(cstc2014jcyjA90026).

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Abstract: The fiber bundle model(FBM) and acoustic emission(AE) tests of sandstone under uniaxial force controlled compression are carried out to study the fracture characteristics of heterogeneous materials. The failure of fiber elements in fiber bundle model is analogous to the acoustic emission signal. The results show that: At low stress stage, FBM ignored the occasional avalanche processes, but FBM characterized acoustic emission characteristics well in high stress stage. The distribution of avalanche sizes and AE events both had double power-law behavior, and the probability distribution function(PDF) of simulations and tests share the similar power exponents and inflection points. Simulation and experimental results show a behavior analogous to the second-order phase transitions, and branching ratio ξ could be as a suitable order parameter to describe this transition. Moreover, near to the critical point, the evolution of branching ratio came from FBM and AE tests are consistent.

Key words: fiber bundle model(FBM), acoustic emission(AE), fracture, avalanche dynamics, second-order phase transition

CLC Number: 

  • TU 452

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