Damage and failure characteristics of single fractured cyan sandstone subjected to freeze-thaw cycles under uniaxial compression
文献类型：期刊论文
| 作者 | Tan, Tao5; Zhang, Chunyang1,2,3,4,5; Dai, Bibo1,4; Zhao, Kui2 |
| 刊名 | THEORETICAL AND APPLIED FRACTURE MECHANICS
 |
| 出版日期 | 2024-04-01 |
| 卷号 | 130页码:15 |
| 关键词 | Cyan sandstone sample with a single crack Freeze-thaw damage mechanism Hoek-Brown strength degradation model Stress intensity factor Crack initiation mechanism |
| ISSN号 | 0167-8442 |
| DOI | 10.1016/j.tafmec.2024.104272 |
| 英文摘要 | In order to explore the freeze-thaw (FT) damage characteristics of fractured rock masses, FT cycle tests and uniaxial compression tests were conducted on intact and pre-cracked cyan sandstone samples, respectively. The degradation laws of physical and mechanical properties of samples under FT cycle conditions were analyzed, and the FT damage mechanism and failure mechanism were explored accordingly. The results indicate that as the number of FT cycles (N) increases, the saturation weight change rate and porosity of the sample continue to increase, while the P-wave velocity continues to decrease. The closure stress, initiation stress, damage stress, and peak stress decrease linearly with increasing FT cycles, and increase linearly with increasing crack inclination angle (fi). Moreover, as FT cycles increase, the geological strength index GSI decreases linearly, while the damage factor (D) increases linearly. A Hoek Brown strength degradation model for fractured rocks subjected to FT damage under uniaxial compression was obtained, and its high reliability was verified using test results. The FT damage of cyan sandstone is mainly dominated by the frost heave force inside the rock, and the degree of FT damage of fractured samples is much higher than that of intact ones. The concentration of frost heave force at the crack tip leading to cracking is the key to exacerbating the FT damage in fractured rock masses. However, the crack initiation mechanism is still controlled by fi. Whenfi = 90, it exhibits tensile initiation mode, and whenfi = 45, it mainly exhibits shear initiation mode. Moreover, the fracture of the single crack sample conforms to the compression-shear fracture criterion. Taking the sample with pre-crack inclination angle of 45 as an example, the variation of KI and KII, and the relationship between them are discussed accordingly. The results of this paper are beneficial to clarify the influence of FT cycles on the mechanical properties of cyan sandstone, and can provide reference for the study of related issues. |
| 资助项目 | National Natural Science Foundation of China[52174088] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[Z020015] |
| WOS研究方向 | Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001167641000001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40729]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhang, Chunyang |
| 作者单位 | 1.Sinosteel Maanshan Gen Inst Min Res Co Ltd, Maanshan 243000, Anhui, Peoples R China 2.Jiangxi Univ Sci & Technol, Sch Resources & Environm Engn, Ganzhou 341000, Jiangxi, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.State Key Lab Safety & Hlth Met Mines, Maanshan 243000, Anhui, Peoples R China 5.Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tan, Tao,Zhang, Chunyang,Dai, Bibo,et al. Damage and failure characteristics of single fractured cyan sandstone subjected to freeze-thaw cycles under uniaxial compression[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2024,130:15. |
| APA | Tan, Tao,Zhang, Chunyang,Dai, Bibo,&Zhao, Kui.(2024).Damage and failure characteristics of single fractured cyan sandstone subjected to freeze-thaw cycles under uniaxial compression.THEORETICAL AND APPLIED FRACTURE MECHANICS,130,15. |
| MLA | Tan, Tao,et al."Damage and failure characteristics of single fractured cyan sandstone subjected to freeze-thaw cycles under uniaxial compression".THEORETICAL AND APPLIED FRACTURE MECHANICS 130(2024):15. |
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。