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Failure characteristics of rock-like materials with single flaws under uniaxial compression

  • Cheng Zhao
  • Jialun Niu
  • Qingzhao ZhangEmail author
  • Chunfeng Zhao
  • Yimeng Zhou
Original Paper
  • 151 Downloads

Abstract

A uniaxial compression test was conducted with a servo loading apparatus to study the failure of a rock-like specimen with a pre-existing single flaw. The evolution of cracks was monitored with digital image correlation technology and simulated with the expanded distinct element method based on the strain strength criterion. The concentration and evolution of the principal strain field were found to be consistent with the initiation, propagation, and coalescence of cracks. As the inclination angle increased, the position of the maximum principal strain concentration changed from within the flaw to the flaw tips, and the distribution of the horizontal displacement field changed from symmetric to antisymmetric. The initiation stress and peak strength were affected by the inclination angle; they were minimum when the inclination angle was 60°. As the inclination angle increased, the failure mode of the specimens transformed from mostly tensile failure to mostly shear failure.

Keywords

Single flaw Uniaxial compression Digital image correlation method (DIC) Strain field Expanded distinct element method (EDEM) 

Notes

Acknowledgements

The authors would like to acknowledge the financial support of the National Key Research and Development Plan [grant number 2017YFC0805004], National Natural Science Foundation of China [grant number 41202193,41572262], and the Shanghai Rising-Star Program [grant number 17QC1400600].

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Geotechnical Engineering and Key Laboratory of Geotechnical and Underground Engineering of Ministry of EducationTongji UniversityShanghaiChina
  2. 2.College of EngineeringTibet UniversityLhasaChina

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