File Download
There are no files associated with this item.
Supplementary
-
Citations:
- Appears in Collections:
Conference Paper: Modeling Grain Size Heterogeneity Effects on Mechanical Behavior of Crystalline Rocks Under Compressive Loading
Title | Modeling Grain Size Heterogeneity Effects on Mechanical Behavior of Crystalline Rocks Under Compressive Loading |
---|---|
Authors | |
Keywords | Material heterogeneity Grain-based model Grain boundary micro-crack Intra-grain micro-crack |
Issue Date | 2019 |
Publisher | Springer International Publishing. |
Citation | The XIII IAEG Congress and 61st AEG Annual Meeting, San Francisco, USA, 17-21 September 2018. In Abdul Shakoor & Kerry Cato (eds.), IAEG/AEG Annual Meeting Proceedings, v. 6: Advances in Engineering Geology: Education, Soil and Rock, p. 177-184. Cham: Springer International Publishing, 2019. How to Cite? |
Abstract | Strength and deformation behavior of intact rocks is influenced by a large number of factors, notably mineralogical content. If the constituent minerals are strong, the overall rock strength will be high, and vice versa. The prediction of rock properties of those composed of different types and amounts of minerals will be difficult. This paper presents a numerical approach to study the influence of material heterogeneity associated with the variation of grain size distribution and shape on the strength and deformation behavior of a felsic crystalline rock. By taking advantage of a grain-based modeling approach in two-dimensional Particle Flow Code, a heterogeneity index is defined and explicitly incorporated into the numerical models quantitatively. The numerical results reveal that the peak strength increases as the numerical model gradually changes the character of the rock from heterogeneous to homogeneous. The number of grain boundary tensile cracks gradually decreases and the number of intra-grain cracks increases at the moment of failure. The orientation of grain boundary micro-cracks is mainly controlled by the geometry of assembled grain structure of the numerical model, while the orientation of intra-grain micro-cracks is to a large degree influenced by the confinement. In addition, the development of intra-grain cracks (both tensile and shear) is much more favored in quartz than in other minerals. The findings of this study provide insights to the interpretation of rock properties, particularly those which are strongly influenced by the heterogeneous mineralogical composition. |
Description | The theme of the IAEG/AEG Meeting 2018 is Engineering Geology for a Sustainable World |
Persistent Identifier | http://hdl.handle.net/10722/264460 |
ISBN |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Peng, J | - |
dc.contributor.author | Wong, NYL | - |
dc.contributor.author | Teh, CI | - |
dc.date.accessioned | 2018-10-22T07:55:15Z | - |
dc.date.available | 2018-10-22T07:55:15Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | The XIII IAEG Congress and 61st AEG Annual Meeting, San Francisco, USA, 17-21 September 2018. In Abdul Shakoor & Kerry Cato (eds.), IAEG/AEG Annual Meeting Proceedings, v. 6: Advances in Engineering Geology: Education, Soil and Rock, p. 177-184. Cham: Springer International Publishing, 2019. | - |
dc.identifier.isbn | 9783319931418 | - |
dc.identifier.uri | http://hdl.handle.net/10722/264460 | - |
dc.description | The theme of the IAEG/AEG Meeting 2018 is Engineering Geology for a Sustainable World | - |
dc.description.abstract | Strength and deformation behavior of intact rocks is influenced by a large number of factors, notably mineralogical content. If the constituent minerals are strong, the overall rock strength will be high, and vice versa. The prediction of rock properties of those composed of different types and amounts of minerals will be difficult. This paper presents a numerical approach to study the influence of material heterogeneity associated with the variation of grain size distribution and shape on the strength and deformation behavior of a felsic crystalline rock. By taking advantage of a grain-based modeling approach in two-dimensional Particle Flow Code, a heterogeneity index is defined and explicitly incorporated into the numerical models quantitatively. The numerical results reveal that the peak strength increases as the numerical model gradually changes the character of the rock from heterogeneous to homogeneous. The number of grain boundary tensile cracks gradually decreases and the number of intra-grain cracks increases at the moment of failure. The orientation of grain boundary micro-cracks is mainly controlled by the geometry of assembled grain structure of the numerical model, while the orientation of intra-grain micro-cracks is to a large degree influenced by the confinement. In addition, the development of intra-grain cracks (both tensile and shear) is much more favored in quartz than in other minerals. The findings of this study provide insights to the interpretation of rock properties, particularly those which are strongly influenced by the heterogeneous mineralogical composition. | - |
dc.language | eng | - |
dc.publisher | Springer International Publishing. | - |
dc.relation.ispartof | IAEG/AEG Annual Meeting Proceedings, 2018—Volume 6: Advances in Engineering Geology: Education, Soil and Rock Properties, Modeling | - |
dc.subject | Material heterogeneity | - |
dc.subject | Grain-based model | - |
dc.subject | Grain boundary micro-crack | - |
dc.subject | Intra-grain micro-crack | - |
dc.title | Modeling Grain Size Heterogeneity Effects on Mechanical Behavior of Crystalline Rocks Under Compressive Loading | - |
dc.type | Conference_Paper | - |
dc.identifier.email | Wong, NYL: lnywong@hku.hk | - |
dc.identifier.authority | Wong, NYL=rp02069 | - |
dc.identifier.doi | 10.1007/978-3-319-93142-5_25 | - |
dc.identifier.hkuros | 293904 | - |
dc.identifier.volume | 6 | - |
dc.identifier.spage | 177 | - |
dc.identifier.epage | 184 | - |
dc.publisher.place | Cham | - |