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| The failure process of marble with filled crack under uniaxial compression based on digital image correlation |
| YUAN Yuan1，2，PAN Pengzhi1，3，ZHAO Shankun4，WANG Bin1，SONG Guihong2 |
| (1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. Department of Architectural and Environment，Hubei University of Technology，Wuhan，Hubei 430071，China；3. College of Resources and Civil Engineering，Northeastern University，Shenyang，Liaoning 110819，China；4. China Coal Research Institute，Beijing 100013，China) |
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Abstract The experiments were carried out to investigate the failure process of marble which has cracks with infilling materials under uniaxial compression. The influence of the inclination angle of preexisting flaw and the different filling conditions on the failure process of rock were discussed through analyzing the characteristics of deformation evolution with the digital image correlation method(DIC) and scanning electron microscope(SEM). The results show that the change of the inclination angle of fracture affects the position of crack initiation，the crack angle and the strength of rock to some extent，while the improvement of the compressive strength is a result of fillers. Whether the fracture has filling or not，the failure modes of the rock are mostly because of the combination of shearing stress and tensile stress，but the damage patterns are different. On account of the fillings，the primary failure mode of rock is the wing crack macroscopically，and the shear failure is more obvious mesoscopically. When there is no fillings，two dominant failure modes of the wing crack and anti-wing crack are observed macroscopically and the tensile failure is more obvious mesoscopically.
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2018, Vol. 37 
