Enhancing understanding of fracture mechanisms in brittle rocks under static and cyclic loads: Experimental insights and theoretical model
文献类型：期刊论文
| 作者 | Miao, Shuting1,2; Pan, Peng-Zhi1,2; Cao, Yangbing3; Huo, Lei4 |
| 刊名 | ENGINEERING FRACTURE MECHANICS
 |
| 出版日期 | 2023-09-01 |
| 卷号 | 289页码:15 |
| 关键词 | Damage evolution Fatigue damage model Acoustic emission Stress intensity factor |
| ISSN号 | 0013-7944 |
| DOI | 10.1016/j.engfracmech.2023.109426 |
| 英文摘要 | The present study investigates the fatigue behavior of granite and red sandstone under coupled static and cyclic loading. Experimental results reveals a three-stage evolution trend for the deformation modulus, Young's modulus, peak strain, residual strain, dissipated energy as a function of the absolute cycle. Acoustic emission (AE) rate also exhibits a three-phase stage, including the initial phase, uniform velocity phase, and accelerated phase. To explain the mechanical responses and fracture mechanisms related to rock fatigue, this study built a micromechanics-based damage model that adopts a modified Paris law and considers both the effect of static stress and stress amplitude. The theoretical model successfully reflects the effect of static loading history and reproduces the three-stage evolution of residual strain during rock fatigue. The SIF deduced by the theoretical model exhibits a distinct behavior: it initially decreases during the first few cycles, stabilizes at a lower value, and subsequently undergoes a significant increase as it approaches the final cycles. The internal cause behind the three-stage evolution of crack growth rate, AE rate, and mechanical properties is attributed to subcritical crack growth during cyclic loading. Finally, the theoretical model successfully characterizes the effect of static stress and stress amplitude of cyclic loads on fatigue damage evolution. |
| 资助项目 | National Natural Science Foundation of China[52125903] |
| WOS研究方向 | Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001034371400001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39082]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Pan, Peng-Zhi; Cao, Yangbing |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China 4.CAS Res Inst Intelligent Decis Engn, Wuhan 430040, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Miao, Shuting,Pan, Peng-Zhi,Cao, Yangbing,et al. Enhancing understanding of fracture mechanisms in brittle rocks under static and cyclic loads: Experimental insights and theoretical model[J]. ENGINEERING FRACTURE MECHANICS,2023,289:15. |
| APA | Miao, Shuting,Pan, Peng-Zhi,Cao, Yangbing,&Huo, Lei.(2023).Enhancing understanding of fracture mechanisms in brittle rocks under static and cyclic loads: Experimental insights and theoretical model.ENGINEERING FRACTURE MECHANICS,289,15. |
| MLA | Miao, Shuting,et al."Enhancing understanding of fracture mechanisms in brittle rocks under static and cyclic loads: Experimental insights and theoretical model".ENGINEERING FRACTURE MECHANICS 289(2023):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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