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Evaluation Methodology of Brittleness of Rock Based on Post-Peak Stress-Strain Curves
文献类型：期刊论文
| 作者 | Meng, Fanzhen; Zhou, Hui; Zhang, Chuanqing; Xu, Rongchao; Lu, Jingjing |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2015 |
| 卷号 | 48期号:5页码:1787-1805 |
| 关键词 | Brittleness Brittle failure intensity Post-peak stress drop Verification |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-014-0694-6 |
| 英文摘要 | Brittleness is an important characteristic of rocks, for it has a strong influence on the failure process no matter from perspective of facilitating rock breakage or controlling rock failure when rocks are being loaded. Various brittleness criteria have been proposed to describe rock brittleness. In this paper, the existing brittle indices are summarised and then analysed in terms of their applicability to describe rock brittleness. The analysis demonstrates that the widely used strength ratio or product (sigma (c)/sigma (t), sigma (c)center dot sigma (t)) of rocks cannot describe rock brittleness properly and that most of the indices neglect the impact of the rock's stress state on its brittleness. A new evaluation method that includes the degree of brittleness (B (d)) and brittle failure intensity (B (f)) is proposed based on the magnitude and velocity of the post-peak stress drop, which can be easily obtained from the conventional uniaxial and triaxial compression tests. The two indices can accurately account for the influence of the confining pressure on brittleness, and the applicability of the new evaluation method is verified by different experiments. The relationship between B (d) and B (f) is also discussed. |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000360006700004 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3751]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn |
| 推荐引用方式 GB/T 7714 | Meng, Fanzhen,Zhou, Hui,Zhang, Chuanqing,et al. Evaluation Methodology of Brittleness of Rock Based on Post-Peak Stress-Strain Curves[J]. ROCK MECHANICS AND ROCK ENGINEERING,2015,48(5):1787-1805. |
| APA | Meng, Fanzhen,Zhou, Hui,Zhang, Chuanqing,Xu, Rongchao,&Lu, Jingjing.(2015).Evaluation Methodology of Brittleness of Rock Based on Post-Peak Stress-Strain Curves.ROCK MECHANICS AND ROCK ENGINEERING,48(5),1787-1805. |
| MLA | Meng, Fanzhen,et al."Evaluation Methodology of Brittleness of Rock Based on Post-Peak Stress-Strain Curves".ROCK MECHANICS AND ROCK ENGINEERING 48.5(2015):1787-1805. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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