Investigation of mechanical properties of bedded shale by nanoindentation tests: A case study on Lower Silurian Longmaxi Formation of Youyang area in southeast Chongqing, China

Xian SHI,Shu JIANG,Shuangfang LU,Zhiliang HE,Dongjie LI,Zhixuan WANG,Dianshi XIAO

Table 4 Statistics on m values of nano indentation mechanical parameters.

Coring angle m value of fracture toughness m of the elastic modulus m of hardness Parallel bedding 3.73 2.99 1.18 Vertical bedding 2.12 2.27 1.01