PSI - Issue 37

5

Author name / Structural Integrity Procedia 00 (2019) 000 – 000

Junpeng Li et al. / Procedia Structural Integrity 37 (2022) 582–589

586

Before test (Rail)

1#50000 (Rail)

2#80000 (Rail) Rolling direction

3#120000 (Rail)

1.0 mm

1.0 mm

1.0 mm

4#160000 (Rail)

5#200000 (Rail)

6#300000 (Rail)

1.0 mm

1.0 mm

1.0 mm

Fig. 4. Optical microscopic observation of worn surface of rail specimens

0% 20% 40% 60% 80% 100%

5.00E+04 1.20E+05 2.00E+05

8.00E+04 1.60E+05 3.00E+05

Accumulation frequency

Crack length/mm

Fig.5. Surface crack length frequency distribution of the main specimen with different load cycles

According to Fig. 4 and Fig. 5, the contact surface of the main specimen is smooth before the experiment, the distribution of cracks and rolling direction is inclined, the angle of the crack opening and rolling direction ϕ is in the