Fracture Characteristics of Layered Phyllite

LIN Haixiao; QIAN Lizhen; CHENG Long; GUO Tengfei

doi:10.11858/gywlxb.20210707

Volume 35 Issue 5

Sep 2021

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Chinese Journal of High Pressure Physics > 2021 > 35(5): 054206.

LIN Haixiao, QIAN Lizhen, CHENG Long, GUO Tengfei. Fracture Characteristics of Layered Phyllite[J]. Chinese Journal of High Pressure Physics, 2021, 35(5): 054206. doi: 10.11858/gywlxb.20210707

Citation:

LIN Haixiao, QIAN Lizhen, CHENG Long, GUO Tengfei. Fracture Characteristics of Layered Phyllite[J]. Chinese Journal of High Pressure Physics, 2021, 35(5): 054206. doi: 10.11858/gywlxb.20210707

LIN Haixiao, QIAN Lizhen, CHENG Long, GUO Tengfei. Fracture Characteristics of Layered Phyllite[J]. Chinese Journal of High Pressure Physics, 2021, 35(5): 054206. doi: 10.11858/gywlxb.20210707

Citation:

LIN Haixiao, QIAN Lizhen, CHENG Long, GUO Tengfei. Fracture Characteristics of Layered Phyllite[J]. Chinese Journal of High Pressure Physics, 2021, 35(5): 054206. doi: 10.11858/gywlxb.20210707

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Fracture Characteristics of Layered Phyllite

doi: 10.11858/gywlxb.20210707

LIN Haixiao^{1, 2,*
,
,},
QIAN Lizhen^1
,,
CHENG Long¹,
GUO Tengfei³

1.
School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China
2.
Henan Key Laboratory of Underground Engineering and Disaster Prevention, Henan Polytechnic University, Jiaozuo 454000, Henan, China
3.
School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China

Received Date: 11 Jan 2021
Rev Recd Date: 28 Jan 2021

Abstract

Abstract

Based on the half-disk layered rock sample with central straight cutting groove, tests on fracture performances of layered phyllite were conducted, and the finite element numerical model of layered rock was developed. The influences of bedding dip angle, bedding strength, bedding thickness, span and different cutting angle on the fracture performances of layered phyllite was systematically studied. The results show that with the change of bedding dip angle from 0° to 90°, model Ⅰ fracture toughness value increases gradually, and the peak load and peak displacement also show increasing trend. When the bedding dip angle is 0°, the tensile failure occurs. When the bedding dip angle is 15°−45°, the shear failure is dominant, and when the bedding dip angle is 60°−90°, the tensile failure is dominant. When the bedding dip angle is 0°, the failure mode is less affected by the bedding strength. For cases with angle of 15° and 30°, with the increase of bedding strength, the specimen changes from shear failure to tensile-shear coupling failure. As the angle ranges from 45° to 90°, the specimens show tensile-shear coupling failure. With the increase of bedding strength, the specimens seem to fail by tension. When the bedding distance is small, the crack shows an obvious ladder-like growth along the bedding plane.
- layered phyllite,
- center straight groove semi-disk,
- bedding dip angle,
- failure mode,
- cohesive element

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References(29)

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Fracture Characteristics of Layered Phyllite

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