Details
| Original language | English |
|---|---|
| Pages (from-to) | 110-120 |
| Number of pages | 11 |
| Journal | Theoretical and Applied Fracture Mechanics |
| Volume | 72 |
| Issue number | 1 |
| Publication status | Published - 28 May 2014 |
| Externally published | Yes |
Abstract
The mechanical behavior of rock is strongly dependent on its embedded discontinuities such as cracks and joints. Natural rock joints are found to exist mostly with filling materials such as sand or clay as weak bond. The filling has been observed in engineering practice to have influence on rock failure behavior. To investigate this topic, the crack propagation behavior of the filled and unfilled crack is studied and compared by testing rock-like specimens subjected to uniaxial compression. A qualitative analysis of the crack propagation paths is described where crack is classified into four types, namely the original, secondary, wing and anti-wing cracks. The experiments indicate the crack initiation time, initiation location and propagation behavior are different between filled and unfilled joints. The experimental results also showed that the peak stress for filled joint is higher than for the unfilled. Numerical tests simulating the experimental process are carried out using the extended finite element method (XFEM) to explore complementary explanations and provide proofs to the experiments.
Keywords
- Brittle crack, Crack propagation, Experiment, Filled crack, Rock-like material, XFEM
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanical Engineering
- Mathematics(all)
- Applied Mathematics
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In: Theoretical and Applied Fracture Mechanics, Vol. 72, No. 1, 28.05.2014, p. 110-120.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A comparative study on unfilled and filled crack propagation for rock-like brittle material
AU - Zhuang, Xiaoying
AU - Chun, Junwei
AU - Zhu, Hehua
PY - 2014/5/28
Y1 - 2014/5/28
N2 - The mechanical behavior of rock is strongly dependent on its embedded discontinuities such as cracks and joints. Natural rock joints are found to exist mostly with filling materials such as sand or clay as weak bond. The filling has been observed in engineering practice to have influence on rock failure behavior. To investigate this topic, the crack propagation behavior of the filled and unfilled crack is studied and compared by testing rock-like specimens subjected to uniaxial compression. A qualitative analysis of the crack propagation paths is described where crack is classified into four types, namely the original, secondary, wing and anti-wing cracks. The experiments indicate the crack initiation time, initiation location and propagation behavior are different between filled and unfilled joints. The experimental results also showed that the peak stress for filled joint is higher than for the unfilled. Numerical tests simulating the experimental process are carried out using the extended finite element method (XFEM) to explore complementary explanations and provide proofs to the experiments.
AB - The mechanical behavior of rock is strongly dependent on its embedded discontinuities such as cracks and joints. Natural rock joints are found to exist mostly with filling materials such as sand or clay as weak bond. The filling has been observed in engineering practice to have influence on rock failure behavior. To investigate this topic, the crack propagation behavior of the filled and unfilled crack is studied and compared by testing rock-like specimens subjected to uniaxial compression. A qualitative analysis of the crack propagation paths is described where crack is classified into four types, namely the original, secondary, wing and anti-wing cracks. The experiments indicate the crack initiation time, initiation location and propagation behavior are different between filled and unfilled joints. The experimental results also showed that the peak stress for filled joint is higher than for the unfilled. Numerical tests simulating the experimental process are carried out using the extended finite element method (XFEM) to explore complementary explanations and provide proofs to the experiments.
KW - Brittle crack
KW - Crack propagation
KW - Experiment
KW - Filled crack
KW - Rock-like material
KW - XFEM
UR - http://www.scopus.com/inward/record.url?scp=84922338154&partnerID=8YFLogxK
U2 - 10.1016/j.tafmec.2014.04.004
DO - 10.1016/j.tafmec.2014.04.004
M3 - Article
AN - SCOPUS:84922338154
VL - 72
SP - 110
EP - 120
JO - Theoretical and Applied Fracture Mechanics
JF - Theoretical and Applied Fracture Mechanics
SN - 0167-8442
IS - 1
ER -