Study on the Influence of Different Prophase Stress Levels on the Fatigue Damage Characteristics of Granite

Figure 7

The relationship between tangent modulus and prophase stress level in the loading process. (a) Upper limit of cyclic stress 105 MPa. (b) Upper limit of cyclic stress 115 MPa. (c) Upper limit of cyclic stress 125 MPa.

(a)

(b)

(c)