PSI - Issue 28

Chahboub Yassine et al. / Procedia Structural Integrity 28 (2020) 1930–1940 CHAHBOUB YASSINE/ Structural Integrity Procedia 00 (2019) 000–000

1937

8

70000

60000

Force N

50000

40000

Range of variation based on the calculation of the coefficient of variation 1.22% ≤ CV%.≤2.55%

30000

20000

10000

COD(mm)

0

0

0,5

1

1,5

2

2,5

3

3,5

Fig 8. The voids nucleation mean quantity Sn

70000

60000

Force N

50000

40000

Range of variation based on the calculation of the coefficient of variation 1.12% ≤ CV%.≤2.4%

30000

20000

10000

COD(mm)

0

0

0,5

1

1,5

2

2,5

3

3,5

Fig 9. new voids nucleation f n

As we can see in the results, the initial void volume fraction f 0 is the most sensitive parameter to a small change in its value. We can conclude that the determination of the exact value of f 0 has to be more precise, and it should have physical meaning and respect the values mentioned in Table 1. For the parameters f c , f f , ɛ n , f n, and S n, the difference between the stress-strain curves are very slight.