Abstract
The dominant causes of irreversible rock deformations are damage process and plastic flow. Most of the existing elastic-plastic models employed in the analysis and design of rock structures only consider the plastic flow and ignore the full damage process. The common plastic models used to simulate the rock failure, does not model the rock realistically and often the important issues such as stiffness degradation, softening, and significant differences in rock response under tensile and compressive loadings are ignored. In the definition of rock damage yield function, many authors considered only the tensile microcracking. Since quasi brittle materials such as rock degrade under tensile and shear microcracking, separate positive and negative damage yield functions were introduced. The proposed damage yield functions are formulated in the framework of a damage model which was coded in C++ environment and implemented into a commercial code. Accordingly, the proposed model was applied to the simulation of brittle rocks behavior. The three point load bending test of a brittle rock was simulated numerically and numerical findings were presented. The analysis results show a very good match between numerical and experimental observation especially in the post-elastic region.
| Original language | English |
|---|---|
| Title of host publication | Constitutive Modeling of Geomaterials |
| Subtitle of host publication | Advances and New Applications |
| Publisher | Springer Verlag |
| Pages | 349-358 |
| Number of pages | 10 |
| ISBN (Print) | 9783642328138 |
| Publication status | Published - Jan 1 2013 |
| Externally published | Yes |
Publication series
| Name | Springer Series in Geomechanics and Geoengineering |
|---|---|
| ISSN (Print) | 1866-8755 |
| ISSN (Electronic) | 1866-8763 |
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Keywords
- Damage yield function
- Rock damage
- Strain softening
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
- Mechanics of Materials
Cite this
Study of rock bending failure mechanism based on a proposed damage model. / Molladavoodi, Hamed; Mortazavi, Ali.
Constitutive Modeling of Geomaterials: Advances and New Applications. Springer Verlag, 2013. p. 349-358 (Springer Series in Geomechanics and Geoengineering).Research output: Chapter in Book/Report/Conference proceeding › Chapter
}
TY - CHAP
T1 - Study of rock bending failure mechanism based on a proposed damage model
AU - Molladavoodi, Hamed
AU - Mortazavi, Ali
PY - 2013/1/1
Y1 - 2013/1/1
N2 - The dominant causes of irreversible rock deformations are damage process and plastic flow. Most of the existing elastic-plastic models employed in the analysis and design of rock structures only consider the plastic flow and ignore the full damage process. The common plastic models used to simulate the rock failure, does not model the rock realistically and often the important issues such as stiffness degradation, softening, and significant differences in rock response under tensile and compressive loadings are ignored. In the definition of rock damage yield function, many authors considered only the tensile microcracking. Since quasi brittle materials such as rock degrade under tensile and shear microcracking, separate positive and negative damage yield functions were introduced. The proposed damage yield functions are formulated in the framework of a damage model which was coded in C++ environment and implemented into a commercial code. Accordingly, the proposed model was applied to the simulation of brittle rocks behavior. The three point load bending test of a brittle rock was simulated numerically and numerical findings were presented. The analysis results show a very good match between numerical and experimental observation especially in the post-elastic region.
AB - The dominant causes of irreversible rock deformations are damage process and plastic flow. Most of the existing elastic-plastic models employed in the analysis and design of rock structures only consider the plastic flow and ignore the full damage process. The common plastic models used to simulate the rock failure, does not model the rock realistically and often the important issues such as stiffness degradation, softening, and significant differences in rock response under tensile and compressive loadings are ignored. In the definition of rock damage yield function, many authors considered only the tensile microcracking. Since quasi brittle materials such as rock degrade under tensile and shear microcracking, separate positive and negative damage yield functions were introduced. The proposed damage yield functions are formulated in the framework of a damage model which was coded in C++ environment and implemented into a commercial code. Accordingly, the proposed model was applied to the simulation of brittle rocks behavior. The three point load bending test of a brittle rock was simulated numerically and numerical findings were presented. The analysis results show a very good match between numerical and experimental observation especially in the post-elastic region.
KW - Damage yield function
KW - Rock damage
KW - Strain softening
UR - http://www.scopus.com/inward/record.url?scp=84902579058&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84902579058&partnerID=8YFLogxK
M3 - Chapter
SN - 9783642328138
T3 - Springer Series in Geomechanics and Geoengineering
SP - 349
EP - 358
BT - Constitutive Modeling of Geomaterials
PB - Springer Verlag
ER -