Propagation of interactive parallel flat elliptical cracks inclined to shear stress
文献类型：期刊论文
| 作者 | Wang, D. Y.1; Zhang, Z. N.1; Zheng, H.2; Ge, X. R.1,2 |
| 刊名 | THEORETICAL AND APPLIED FRACTURE MECHANICS
 |
| 出版日期 | 2013 |
| 卷号 | 63-64页码:18-31 |
| 关键词 | Embedded flat cracks Shear stress Propagation Augmented virtual internal bond 3D element partition method |
| ISSN号 | 0167-8442 |
| DOI | 10.1016/j.tafmec.2013.03.002 |
| 英文摘要 | The propagation and interaction of parallel arrays of cracks embedded in rock mass have critical impact on the stability of rock mass subjected to earthquake. To investigate the propagation of these embedded cracks under shear stress, three-dimensional element partition method (3D-EPM) is used to model the pre-existing cracks in conjunction with the augmented virtual internal bond (AVIB) constitutive model to describe the rock matrix. By 3D-EPM, the contact effect of crack faces can be automatically accounted in the original mesh scheme. By AVIB, the failure criterion would be implicitly invoked by the micro fracture mechanism. It is revealed that the propagation pattern of embedded flat cracks to shear stress is related to the inclination of crack relative to the shear force. When the inclination is smaller than 90, the father crack firstly propagates in wrapping wing pattern. Then, many parallel arrays of descendent cracks, which are vertical to the relative slip of the father crack faces, anti-symmetrically initiate on part of the upper and the lower father crack faces, respectively. With the inclination increasing, the distribution area of the descendent cracks moves from the lower to the upper part of the father crack face. With shear stress increasing, a prior propagation path, vertical to the father crack face, is formed near the middle transect of the father crack. Finally, these prior extended descendent cracks adjacent to different father cracks coalesce together in zigzag at rock bridges. However, when the inclination is bigger than 90, the father cracks only independently propagate along their minor axis directions. The extended crack is coplanar with the father crack. In all inclination cases, no apparent tensile fracture propagates at the two major axis tips of the original crack. It is also found that the shear strength of the cracked specimen is strongly dependent on the inclination of embedded cracks. When the inclination varies from 0 to 400 or from 180 to 120, the shear strength remarkably decreases while when the inclination varies from 40 to 120, the shear strength changes very little. The features of crack propagation obtained and the conclusions drawn in the present paper are significantly valuable for the evaluation of jointed rock slope stability and landslide. (C) 2013 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000319246300002 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3422]  |
| 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 | 1.Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn ; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn |
| 推荐引用方式 GB/T 7714 | Wang, D. Y.,Zhang, Z. N.,Zheng, H.,et al. Propagation of interactive parallel flat elliptical cracks inclined to shear stress[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2013,63-64:18-31. |
| APA | Wang, D. Y.,Zhang, Z. N.,Zheng, H.,&Ge, X. R..(2013).Propagation of interactive parallel flat elliptical cracks inclined to shear stress.THEORETICAL AND APPLIED FRACTURE MECHANICS,63-64,18-31. |
| MLA | Wang, D. Y.,et al."Propagation of interactive parallel flat elliptical cracks inclined to shear stress".THEORETICAL AND APPLIED FRACTURE MECHANICS 63-64(2013):18-31. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。