EGU2020-12195
https://doi.org/10.5194/egusphere-egu2020-12195
EGU General Assembly 2020
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Experimental and CDEM Analysis on Crack Propagation Mechanism of Rock-Like Material Containing Flaws Under Uniaxial and Biaxial Compression

Yong Li, Weishen Zhu, Chao Wei, Weibing Cai, Guannan Wu, Zhiheng Wang, and Weiqiu Kong
Yong Li et al.
  • Geotechnical & Structural Engineering Research Center, Shandong University, China (yongli@sdu.edu.cn)

Abstract: Uniaxial and biaxial tests are performed to investigate the evolution mechanism of crack propagation and coalescence through developing newly cement mortar materials with horizontal and inclined pre-existing flaws. Additionally, a new numerical method-CDEM (Continuous discrete element method) is employed to analyze the evolution laws of stress field of crack tips under hydraulic coupling. The results reveal that the maximum principal stress of the wing crack tip gradually decreases with increase of internal water pressure, and the initiation stress, initiation angle and peak strength show decreasing trend. The results of crack propagation and coalescence obtained by numerical simulation is consistent with laboratory results. With the water pressure increases, prior to the occurrence of wing cracks, the coplanar cracks firstly initiate around inclined flaws. Under the coupling action of uniaxial compression and internal water pressure, the lateral pressure would limit the initiation of the wing cracks, while the increasing water pressure weakens the inhibition of lateral pressure on wing cracks.

How to cite: Li, Y., Zhu, W., Wei, C., Cai, W., Wu, G., Wang, Z., and Kong, W.: Experimental and CDEM Analysis on Crack Propagation Mechanism of Rock-Like Material Containing Flaws Under Uniaxial and Biaxial Compression, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-12195, https://doi.org/10.5194/egusphere-egu2020-12195, 2020

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