Abstract
The processes of localized deformation band formation and crack generation in brittle-plastic materials are simulated numerically in various loading conditions. The patterns of cracking and strain localized band for a sandstone specimen in compression and are obtained. To describe inelastic behavior of pressure-sensitive materials, the mathematical tools and concepts of plasticity theory are employed. In the computations the Nikolaevskii model with a non-associated flow rule is used. In the course of "plastic" deformation damages, are accumulated. Macrocrack opening and material fracture are described explicitly. For this purpose the node-splitting technique is used and the free-surface conditions are given on newly formed boundaries. This provides self-acting account of crack generation for the entire calculation area in the course of deformation. The use of the considered approaches in describing the behavior of a rock specimen as an ideal homogeneous medium allows a good agreement of fracture patterns as well as of various types of stress-strain dependences with the experimental findings. In order to describe in detail the behavior peculiarities of heterogeneous porous and cracked materials, it is necessary to give due consideration for their structural features and crack growth.
| Original language | English |
|---|---|
| Title of host publication | 11th International Conference on Fracture 2005, ICF11 |
| Pages | 4455-4460 |
| Number of pages | 6 |
| Volume | 6 |
| Publication status | Published - 2005 |
| Event | 11th International Conference on Fracture 2005, ICF11 - Turin, Italy Duration: 20 Mar 2005 → 25 Mar 2005 |
Other
| Other | 11th International Conference on Fracture 2005, ICF11 |
|---|---|
| Country | Italy |
| City | Turin |
| Period | 20.3.05 → 25.3.05 |
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ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
Cite this
Numerical simulation of fracture in rocks. / Stefanov, Yurii P.; Evseev, Viktor D.
11th International Conference on Fracture 2005, ICF11. Vol. 6 2005. p. 4455-4460.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Numerical simulation of fracture in rocks
AU - Stefanov, Yurii P.
AU - Evseev, Viktor D.
PY - 2005
Y1 - 2005
N2 - The processes of localized deformation band formation and crack generation in brittle-plastic materials are simulated numerically in various loading conditions. The patterns of cracking and strain localized band for a sandstone specimen in compression and are obtained. To describe inelastic behavior of pressure-sensitive materials, the mathematical tools and concepts of plasticity theory are employed. In the computations the Nikolaevskii model with a non-associated flow rule is used. In the course of "plastic" deformation damages, are accumulated. Macrocrack opening and material fracture are described explicitly. For this purpose the node-splitting technique is used and the free-surface conditions are given on newly formed boundaries. This provides self-acting account of crack generation for the entire calculation area in the course of deformation. The use of the considered approaches in describing the behavior of a rock specimen as an ideal homogeneous medium allows a good agreement of fracture patterns as well as of various types of stress-strain dependences with the experimental findings. In order to describe in detail the behavior peculiarities of heterogeneous porous and cracked materials, it is necessary to give due consideration for their structural features and crack growth.
AB - The processes of localized deformation band formation and crack generation in brittle-plastic materials are simulated numerically in various loading conditions. The patterns of cracking and strain localized band for a sandstone specimen in compression and are obtained. To describe inelastic behavior of pressure-sensitive materials, the mathematical tools and concepts of plasticity theory are employed. In the computations the Nikolaevskii model with a non-associated flow rule is used. In the course of "plastic" deformation damages, are accumulated. Macrocrack opening and material fracture are described explicitly. For this purpose the node-splitting technique is used and the free-surface conditions are given on newly formed boundaries. This provides self-acting account of crack generation for the entire calculation area in the course of deformation. The use of the considered approaches in describing the behavior of a rock specimen as an ideal homogeneous medium allows a good agreement of fracture patterns as well as of various types of stress-strain dependences with the experimental findings. In order to describe in detail the behavior peculiarities of heterogeneous porous and cracked materials, it is necessary to give due consideration for their structural features and crack growth.
UR - http://www.scopus.com/inward/record.url?scp=84869745982&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84869745982&partnerID=8YFLogxK
M3 - Conference contribution
SN - 9781617820632
VL - 6
SP - 4455
EP - 4460
BT - 11th International Conference on Fracture 2005, ICF11
ER -