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Investigation on the mechanical behaviors of pre-cracked Brazilian disks using a trigon-based numerical manifold method

  • Yalong JiangEmail author
  • Zhen-zhen Xu
  • Jun He
Original Paper
  • 17 Downloads

Abstract

In this study, a trigon-based numerical manifold method is developed to study the mechanical properties, including the crack propagation and coalescence process as well as peak compressive line loads of the pre-cracked Brazilian disks. An assemblage of trigon loops is adopted to approximate the microstructure of the rock-like specimens, based on which a modified cohesive contact model considering cohesion and tensile strength is used to interpret the fracturing behaviors of the cemented interfaces as well as the interactions between the initiated cracks. Firstly, numerical uniaxial compression test is carried out to calibrate the micro-mechanical parameters of the model. With the calibrated parameters, a series of numerical Brazilian splitting tests are conducted on the pre-crack disks including both single-cracked and double-cracked disks with varying crack inclination angles. Comparisons between the numerical simulations and laboratory results indicate that the mechanical behaviors of the pre-cracked specimens can be well predicted by the trigon-based NMM models.

Keywords

Mechanical properties Pre-cracked disks Brazilian splitting test Numerical simulation Trigon-based numerical manifold method 

Notes

Funding information

The research work is supported by the National Natural Science Foundation of China (Grant Nos. 41502283), the National Basic Research Program of China (973 Program) (Grant No, 2014CB046904), and the Natural Science Foundation of Jiangxi Province (20192BAB216031).

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Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  1. 1.Institute of Geotechnical Engineering, School of Civil Engineering and ArchitectureEast China Jiaotong UniversityNanchangPeople’s Republic of China
  2. 2.Jiangxi Key Laboratory of Infrastructure Safety and Control in Geotechnical EngineeringEast China Jiaotong UniversityNanchangPeople’s Republic of China
  3. 3.School of Civil EngineeringWuhan UniversityWuhanPeople’s Republic of China

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