Details
Originalsprache | Englisch |
---|---|
Seiten (von - bis) | 22-30 |
Seitenumfang | 9 |
Fachzeitschrift | Underground Space (China) |
Jahrgang | 4 |
Ausgabenummer | 1 |
Frühes Online-Datum | 15 Aug. 2018 |
Publikationsstatus | Veröffentlicht - März 2019 |
Abstract
The interactions between defects are important in rocks. The micromechanical interactions between a circular hole and a pre-existing crack under uniaxial compression with different loading rates are investigated by the discrete element method (DEM). The crack initiation, crack propagation, and crack coalescence at different loading rates are studied. The loading rates influence the primary as well as secondary cracks. Both the primary and secondary cracks disturb the stress field and displacement field. The DEM simulation explains the initiation position of the primary and secondary cracks. The evolution of the displacement field and the stress field at different loading rates is analyzed. A new displacement field type is observed. The hole is easier to be broken by compression at higher loading rates while it tends to be broken by the coalescence crack at lower loading rates. The high loading rates lead to shielding effects of the hole on the pre-existing crack.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Tief- und Ingenieurbau
- Erdkunde und Planetologie (insg.)
- Geotechnik und Ingenieurgeologie
- Ingenieurwesen (insg.)
- Bauwesen
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in: Underground Space (China), Jahrgang 4, Nr. 1, 03.2019, S. 22-30.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Micromechanical study of loading rate effects between a hole and a crack
AU - Zhou, Shuai
AU - Zhuang, Xiaoying
N1 - Funding information: This work was supported by the Sofa-Kovalevskaja Award of Alexander von Humboldt Foundation .
PY - 2019/3
Y1 - 2019/3
N2 - The interactions between defects are important in rocks. The micromechanical interactions between a circular hole and a pre-existing crack under uniaxial compression with different loading rates are investigated by the discrete element method (DEM). The crack initiation, crack propagation, and crack coalescence at different loading rates are studied. The loading rates influence the primary as well as secondary cracks. Both the primary and secondary cracks disturb the stress field and displacement field. The DEM simulation explains the initiation position of the primary and secondary cracks. The evolution of the displacement field and the stress field at different loading rates is analyzed. A new displacement field type is observed. The hole is easier to be broken by compression at higher loading rates while it tends to be broken by the coalescence crack at lower loading rates. The high loading rates lead to shielding effects of the hole on the pre-existing crack.
AB - The interactions between defects are important in rocks. The micromechanical interactions between a circular hole and a pre-existing crack under uniaxial compression with different loading rates are investigated by the discrete element method (DEM). The crack initiation, crack propagation, and crack coalescence at different loading rates are studied. The loading rates influence the primary as well as secondary cracks. Both the primary and secondary cracks disturb the stress field and displacement field. The DEM simulation explains the initiation position of the primary and secondary cracks. The evolution of the displacement field and the stress field at different loading rates is analyzed. A new displacement field type is observed. The hole is easier to be broken by compression at higher loading rates while it tends to be broken by the coalescence crack at lower loading rates. The high loading rates lead to shielding effects of the hole on the pre-existing crack.
KW - Compressive loading
KW - Cracking processes
KW - Defect
KW - DEM
KW - Loading rate
KW - Rock
UR - http://www.scopus.com/inward/record.url?scp=85057116973&partnerID=8YFLogxK
U2 - 10.1016/j.undsp.2018.08.001
DO - 10.1016/j.undsp.2018.08.001
M3 - Article
AN - SCOPUS:85057116973
VL - 4
SP - 22
EP - 30
JO - Underground Space (China)
JF - Underground Space (China)
SN - 2096-2754
IS - 1
ER -