PSI - Issue 37

Yifan Li et al. / Procedia Structural Integrity 37 (2022) 41–48 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

46 6

Fig. 6. Relative Crack length as a function of elastic compliance (ASTM E647-15 2015).

Table. 1. The constants determined from the measuring point (ASTM E647-15 2015). Meas. Location C 0 C 1 C 2 C 3

C 4

C 5

V 0

1.0010

-4.6695

18.460

-236.82

1214.9

-2143.6

The relationship between the crack length and number of cycles for different orientations lattices is shown in Fig. 7. As shown in Fig. 7 that crack propagated fastest in orientation-Y lattice when the load ranges of different orientations lattices had similar values.

40

Orien-X (220N) Orien-Y (230N) Orien-Z (240N)

38

36

34

30 crack length a (mm) 32

28

26

24

0

2000 4000 6000 8000 10000 12000

Number of cycles

Fig. 7. Relationship between crack length and number of cycles for different orientations.