Mode I Fracture Toughness Test and Fractal Character of Fracture Trajectory of Red Sandstone under Real-Time High Temperature

Table 3

The average of fracture deviation from center line of sandstone at various temperatures.

Temperature (°C)	Fracture deviation (left side) (mm)	Fracture deviation (right side) (mm)
20	2.6	1.9
100	2.4	1.8
200	3.5	2.8
300	3.8	4.5
400	4.3	5.2
500	5.7	6.4
600	6.8	7.5
700	7.9	9.6