A discussion of "Application of nano-indentation methods to estimate nanoscale mechanical properties of shale reservoir rocks" by K Liu, M Osatadhassan and B Bubach

作者：Zeng, Qiang^*; Feng, Ying; Xu, Shilang

来源：Journal of Natural Gas Science and Engineering, 2017, 42: 187-189.

DOI：10.1016/j.jngse.2017.02.027

• Nanoindentation
• Fracture toughness
• Method

This paper presents a discussion on a recent article authored by Liu et al. [Application of nano indentation methods to estimate nanoscale mechanical properties of shale reservoir rocks, Journal of Natural Gas Science and Engineering 35 (2016) 1310-1319]. The authors may estimate the fracture stress intensity factor U-pp/U-t incorrectly by ignoring the effect of holding step in indentation load-displacement curves when evaluating the plastic-to-total energy ratio. We here proposed a new equation in which the holding step was considered. We obtained different values of fracture toughness of the shale samples.

• 出版日期2017-6
• 单位浙江大学