Full-field deformation measurements from Brazilian disc tests on anisotropic phyllite under impact loads
文献类型：期刊论文
| 作者 | Wu, R. J.1,3; Li, H. B.1,3; Wang, D. P.2 |
| 刊名 | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
 |
| 出版日期 | 2021-03-01 |
| 卷号 | 149页码:12 |
| 关键词 | Transversely isotropic High speed digital image correlation Full-field strain Dynamic strength Crack evolution process |
| ISSN号 | 0734-743X |
| DOI | 10.1016/j.ijimpeng.2020.103790 |
| 英文摘要 | To explore the dynamic fracturing behaviours and failure mechanisms, transversely isotropic phyllite rocks with five bedding plane angles were investigated for full-field strain Brazilian disc tests under different strain rates using a split Hopkinson pressure bar and high-speed digital image correlation (DIC) technology. Two kinds of crack evolution processes: the cracks in specimens with low bedding angles activated near the non-loading point, and other cracks initiated at the centre of the disc prior to exceeding the peak stress were observed. Considering the four types of failure modes characterized by different mechanisms, the dynamic failure mechanism of transversely isotropic rock was discussed. The Brazilian disc strength of transversely isotropic rock subjected to impact loads was computed by introducing the patchy weakness model to reflect the dominant role of the rock matrix in the dynamic test. The DIC results demonstrated that additional random orientation defects are activated and the competition for evolving into cracks becomes intense, indicating that cracks develop less along bedding planes as the strain rate increases. Moreover, the fracture patterns of the transversely isotropic phyllite specimens changed under static and dynamic conditions. Therefore, it is necessary to study the properties of transversely isotropic rocks under dynamic impacts rather than simply using inferences from static results. |
| 资助项目 | National Natural Science Foundation of China (NSFC)[51439008] ; National Natural Science Foundation of China (NSFC)[51679231] ; China Scholarship Council[202004910629] |
| WOS研究方向 | Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000606518100001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/25565]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, H. B. |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Southeast Univ, Inst Monash Univ Southeast Univ Joint Res, Sch Civil Engn, Nanjing 211189, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, R. J.,Li, H. B.,Wang, D. P.. Full-field deformation measurements from Brazilian disc tests on anisotropic phyllite under impact loads[J]. INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,2021,149:12. |
| APA | Wu, R. J.,Li, H. B.,&Wang, D. P..(2021).Full-field deformation measurements from Brazilian disc tests on anisotropic phyllite under impact loads.INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,149,12. |
| MLA | Wu, R. J.,et al."Full-field deformation measurements from Brazilian disc tests on anisotropic phyllite under impact loads".INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 149(2021):12. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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