“…The flaw geometry parameters, including flaw length, wide, and ligament length are 14, 1.6, and 16 mm, as demonstrated in Figure 1. In order to facilitate the description, the specimen is named in a combination of letters and numbers, in which SN75‐45 is taken as an example, where S, N, 75, and 45 designate sandstone, non‐filled, inclination angle, and ligament angle, respectively 25,26 …”