PSI - Issue 52

Made Wiragunarsa et al. / Procedia Structural Integrity 52 (2024) 583–593 Wiragunarsa et al. / Structural Integrity Procedia 00 (2023) 000–000

589

7

Γ

Γ

(b)

(a)

Fig. 3. Crack modelling technique and the J -integral path: (a) particle deletion, (b) interaction deletion

L 2

L 3

L 5

L 1

2h

L 4

h

h

(a)

(b)

Fig. 4. Particle interaction at the crack surface : (a) particle deletion, (b) interaction deletion

L

a

σ

α

σ

W

Fig. 5. Configuration of the rectangular plate with a centre crack

framework, the crack growth direction follows the location of the particle with max ( σ i 1 ) around the crack tip, in which σ 1 is the maximum principal stress. On the other hand, the interaction deletion framework follows the location of max ( 1 2 ( σ i 1 + σ j 1 )). As a comparison, an experiment result of an oblique centre-crack tension specimen can be found in Pustejovsky [1979]. The study showed that at the beginning of the crack propagation, the crack path tends to deflect and then make a perpendicular path to the load direction. Based on the test, the interaction deletion framework give better crack path prediction.