Influence of initial stresses and unloading rates on the deformation and failure mechanism of Jinping marble under true triaxial compression

2019 ◽  
Vol 117 ◽  
pp. 90-104 ◽  
Author(s):  
Hong Xu ◽  
Xia-Ting Feng ◽  
Chengxiang Yang ◽  
Xiwei Zhang ◽  
Yangyi Zhou ◽  
...  
Keyword(s):  
Failure Mechanism ◽  
Triaxial Compression ◽  
Initial Stresses ◽  
Deformation And Failure ◽  
True Triaxial ◽  
True Triaxial Compression ◽  
Jinping Marble

Brittle-ductile transition and failure mechanism of Jinping marble under true triaxial compression

2018 ◽  
Vol 232 ◽  
pp. 160-170 ◽  
Author(s):  
Jun Zhao ◽  
Xia-Ting Feng ◽  
Xi-Wei Zhang ◽  
Yan Zhang ◽  
Yang-Yi Zhou ◽  
...  
Keyword(s):  
Failure Mechanism ◽  
Triaxial Compression ◽  
True Triaxial ◽  
Brittle Ductile Transition ◽  
True Triaxial Compression ◽  
Jinping Marble

Effect of high differential stress and mineral properties on deformation and failure mechanism of hard rocks

2020 ◽  
Author(s):  
Xia-Ting Feng ◽  
Jun Zhao ◽  
Zhaofeng Wang ◽  
Cheng-Xiang Yang ◽  
Qiang Han ◽  
...  
Keyword(s):  
Triaxial Compression ◽  
Strain Curve ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Differential Stress ◽  
Deformation And Failure ◽  
True Triaxial ◽  
Elastic Plastic ◽  
Hard Rocks ◽  
True Triaxial Compression

In order to study the deformation and failure mechanism of hard rocks, true triaxial compression tests were conducted on four type of hard rocks to obtain the complete stress-strain curve and failure modes. Under true triaxial compression condition, the shape of the complete stress-strain curve can be divided into three types: elastic-brittle (EB), elastic-plastic-brittle (EPB), and elastic-plastic-ductile (EPD) types. According to the different post-peak deformation behaviours, the stress-strain curves of elastic-plastic-brittle (EPB) type can be subdivided into three sub-categories: post-peak instantaneous brittle (EPB-I) type, post-peak multi-stage brittle (EPB-M) type, and post-peak delayed brittle (EPB-D) type. The stress-strain curves change from EPD to EPB-D to EPB-M to EPB-I to EB with increasing differential stress (σ2-σ3). The deformation characteristics are dependent on the σ2, σ3, mineral composition and mineral texture to the rock sample. An increase in σ3 leads to an increased ductility, while an increase in σ2 leads to an increased brittleness. Moreover, rocks with regular mineral texture and low mineral hardness are more prone to ductility. When the deformation curve is transformed from EPD to EPB to EB, the tensile crack is gradually dominant, and the macroscopic failure angle is gradually steeper.

Post-peak deformation and failure behaviour of Jinping marble under true triaxial stresses

2020 ◽  
Vol 265 ◽  
pp. 105444
Author(s):  
Zhi Zheng ◽  
Xia-Ting Feng ◽  
Cheng-Xiang Yang ◽  
Xi-Wei Zhang ◽  
Shao-Jun Li ◽  
...  
Keyword(s):  
Deformation And Failure ◽  
True Triaxial ◽  
Failure Behaviour ◽  
Triaxial Stresses ◽  
Jinping Marble

A Three-Dimensional Failure Criterion for Hard Rocks Under True Triaxial Compression

2019 ◽  
Vol 53 (1) ◽  
pp. 103-111 ◽  
Author(s):  
Xia-Ting Feng ◽  
Rui Kong ◽  
Chengxiang Yang ◽  
Xiwei Zhang ◽  
Zhaofeng Wang ◽  
...  
Keyword(s):  
Failure Criterion ◽  
Triaxial Compression ◽  
Three Dimensional ◽  
True Triaxial ◽  
Hard Rocks ◽  
True Triaxial Compression
Sign in / Sign up

Export Citation Format

Share Document