期刊
GEOFLUIDS
卷 2021, 期 -, 页码 -出版社
WILEY-HINDAWI
DOI: 10.1155/2021/6621643
关键词
-
资金
- National Natural Science Foundation of China [41772313]
- Hunan Science and Technology Planning Project [2019RS3001]
- Fundamental Research Funds for Central Universities of the Central South University [2019zzts682]
An upscaling method for estimating macrofracture toughness by nanoindentation results was proposed and verified in this study. Grid nanoindentation tests were conducted on sandstone samples to obtain micromechanical properties, and the method resulted in a discrepancy of 8.8% compared to the NSCB test, proving its accuracy and reliability in providing more precise upscaling results.
An upscaling method for estimating macrofracture toughness by nanoindentation results was proposed in this study. Grid nanoindentation tests were conducted on sandstone samples to obtain micromechanical properties of indents, including elastic modulus, hardness, and stiffness. Multifactor cluster analysis was then carried out to categorize the sandstone into five mechanical phases. Finally, the macrofracture toughness was predicted by using the macroelastic modulus of the sample and the critical energy release rate of the weakest phase. To verify this method, the upscaling result was compared with the macrofracture toughness measured by the notched semicircular bending (NSCB) test. The discrepancy in the macrofracture toughness from our method and the NSCB test was 8.8%, which was acceptable. Also, it is proved that our method can provide more accurate upscaling results compared to other methods.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据