Research on Fatigue Damage in High-Strength Steel (FV520B) Using Nonlinear Ultrasonic Testing

Figure 10

Relationship between nonlinearity parameter and fatigue cycles. (a) Relationship between nonlinearity parameter and fatigue cycles of plate specimen (400 MPa loading stress). (b) Relationship between nonlinearity parameter and fatigue cycles of the notched specimen (550 MPa stress concentration). (c) Relationship between nonlinearity parameter and fatigue cycles of the notched specimen (660 MPa stress concentration).

(a)

(b)

(c)