Experimental Study of Fracture Characterizations of Rocks under Dynamic Tension Test with Image Processing

Figure 3

An overview of the proposed approach for the investigation of dynamic fracture process of rock materials under SHPB impact loading. (a) an input video of rock fracture process; (b) an algorithm for multicracks extraction; (c) crack extraction results for a fracture process video; (d) dynamic strain-stress response of rock specimens; (e) the formula of Pearson’s correlation coefficient; (f) matrix of crack evolution features; (g) matrix of dynamic mechanical properties; (h) a correlation matrix heat-map of relationship between crack evolution features and dynamic mechanical properties.