Rate effect on crack propagation measurement results with crack propagation gauge, digital image correlation, and visual methods
文献类型：期刊论文
| 作者 | Ju, Minghe; Li, Jianchun; Yao, Qiangling; Li, Xiaofeng; Zhao, Jian |
| 刊名 | ENGINEERING FRACTURE MECHANICS
 |
| 出版日期 | 2019 |
| 卷号 | 219页码:- |
| 关键词 | Crack propagation gauge Digital image correlation Fracture process zone Rate dependent Rock material |
| ISSN号 | 0013-7944 |
| DOI | 10.1016/j.engfracmech.2019.106537 |
| 英文摘要 | The rate-dependent measurement gaps among the crack propagation gauge (CPG), digital image correlation (DIC), and Visual methods for measuring dynamic rock crack propagation were determined using a case study. Dynamic notched semi-circular bending (NSCB) tests of a rock material, namely, red sandstone, were conducted using a modified split Hopkinson pressure bar system to form different crack propagating velocities (CPVs). From the viewpoint of the initial crack time, a normal strain threshold of 2% in the DIC was effective in obtaining a match between the CPG and DIC methods at a low CPV. However, the selected 2%-5% normal strains in the DIC were pivotal factors that could compromise the results from the CPG and Visual methods with a low CPV in terms of the peak CPV, whereas 2%-3% normal strains were recommended for cases with a high CPV. In addition, the equivalent crack-velocity-dependent strain thresholds (t(i)(DIC) equal to t(i)(CPG) and t(i)(DIC) equal to t(i)(Visual)) for the CPG, Visual, and DIC techniques displayed a linear fit with the CPV. The measurement gap between the DIC and Visual methods was narrower than the measurement gap between the DIC and CPG methods. The critical initial crack time of CPG for red sandstone needed the condition of a CPV of approximately 500 m/s. A potential explanation for these gaps was proposed in terms of the changes in the fracture process zone with CPV, and three suggestions were subsequently recommended based on the experimental results to aid in the interpretation of other experimental results. |
| WOS研究方向 | Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000487812100013 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/14871]  |
| 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.Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia; 2.Southeast Univ, Inst Future Underground Space, Sch Civil Engn, Nanjing 211189, Jiangsu, Peoples R China; 3.China Univ Min & Technol, Sch Mines, Xuzhou 221116, Jiangsu, Peoples R China; 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ju, Minghe,Li, Jianchun,Yao, Qiangling,et al. Rate effect on crack propagation measurement results with crack propagation gauge, digital image correlation, and visual methods[J]. ENGINEERING FRACTURE MECHANICS,2019,219:-. |
| APA | Ju, Minghe,Li, Jianchun,Yao, Qiangling,Li, Xiaofeng,&Zhao, Jian.(2019).Rate effect on crack propagation measurement results with crack propagation gauge, digital image correlation, and visual methods.ENGINEERING FRACTURE MECHANICS,219,-. |
| MLA | Ju, Minghe,et al."Rate effect on crack propagation measurement results with crack propagation gauge, digital image correlation, and visual methods".ENGINEERING FRACTURE MECHANICS 219(2019):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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