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

JIANG De-yi; YUE Hao-xue; ZHANG Xuan; XIE Kai-nan; JIANG Xiang

doi:10.16285/j.rsm.2017.S2.001

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

更新时间：2026-06-25

- Acoustic emission of sandstone under uniaxial compression and simulation of fiber bundle model
- Vol. 38, Issue S2, Pages: 1-8(2017)
- 作者机构：
  
  1. 重庆大学煤矿灾害动力学与控制国家重点实验室,重庆,400044
  2. 重庆大学土木工程学院,重庆,400044
  3. 剑桥大学地球科学系,英格兰,英国,CB2 3EQ
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.S2.001
  CLC： TU452
- Online First：05 June 2018，
  
  Published：2017
- 稿件说明：
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JIANG De-yi, YUE Hao-xue, ZHANG Xuan, et al. Acoustic emission of sandstone under uniaxial compression and simulation of fiber bundle model[J]. 2017, 38(S2): 1-8.
DOI：

JIANG De-yi, YUE Hao-xue, ZHANG Xuan, et al. Acoustic emission of sandstone under uniaxial compression and simulation of fiber bundle model[J]. 2017, 38(S2): 1-8. DOI： 10.16285/j.rsm.2017.S2.001.

摘要

利用纤维束模型(FBM)模拟非均质材料破坏动力学行为，在实验室内进行了砂岩力控制单轴压缩声发射(AE)试验。将纤维束模型纤维断裂与砂岩声发射类比分析发现，低应力阶段纤维束模型对偶发的雪崩过程敏感性低，但在高应力阶段纤维束模型能够很好地表征应力控制单轴压缩砂岩声发射特征；雪崩尺寸的模拟和试验结果都呈现双幂形式，具有相似的双幂指数和转换点；模拟和试验结果都以纤维束模型为基础和声发射反映固体内部损伤为前提，固体的破裂失稳满足二阶相变特征，且分叉率ξ是符合描述二阶相变的连续序参量；在临界点附近针对分支率演化（固体破裂相变）过程概率理论、纤维束模拟与声发射试验结果一致，可见纤维束模型能较好地模拟岩石声发射行为进而反映岩石损伤断裂过程。

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.

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