Issue 36

Lj. L. Vulićević et alii, Frattura ed Integrità Strutturale, 36 (2016) 46-54; DOI: 10.3221/IGF-ESIS.36.05

K I , Tab. 2, including its average, minimum and maximum values along the crack front. Tab. 2 also shows number of point in each crack growth step, being between 66 and 68.

x front coordinate [mm]

y front coordinate [mm]

z f ront coordinate [mm]

Curvilinear abscissa along the crack front [mm]

K eq [MPa√m]

K I [MPa√m]

K II [MPa√m]

K III [MPa√m]

0.000 0.151 0.293 0.445 0.585 0.716 0.855

0.033 0.031 0.028 0.025 0.023 0.021 0.018

0.781 0.791 0.801 0.815 0.828 0.841 0.853

0.035 0.187 0.328 0.479 0.618 0.749 0.887

67.4 67.4 67.4 67.5 67.5 67.5 67.5

67.3 67.3 67.4 67.4 67.4 67.4 67.4

-0.1 -0.1 -0.1 -0.1 -0.1 -0.2 -0.2

0.8 0.7 0.7 0.6 0.5 0.5 0.4

Table 2 : Values for K eq

, K I

, K II

, and K III

in the 16 th crack growth step.

SIF for mod I, K I [MPa  m]

Crack length a [mm]

Number of points of the crack front

average value

step

max

min

1 2 3 4 5 6 7 8 9

2.00 2.15 2.31 2.47 2.65 2.84 3.03 3.22 3.42 3.61 3.80 3.96 4.19 4.39 4.58 4.78 4.98 5.18 5.38 5.58 5.78 5.98 6.18 6.37 6.58 6.78 6.98 7.18

66 68 66 68 68 66 68 68 66 68 68 66 68 68 66 68 68 66 68 68 66 68 66 66 68 68 66 68

28.09 29.63 30.97 32.44 34.34 36.42 37.84 40.22 42.97 44.93 47.99 51.62 54.40 58.43 63.43 67.45 73.02 80.30 86.26 94.77

26.34 27.93 29.50 31.46 33.81 35.82 37.39 39.77 42.62 44.58 47.49 51.19 54.15 57.91 63.07 67.19 72.59 79.84 85.91 94.09

27.60 29.08 30.60 32.16 34.04 36.22 37.68 39.99 42.82 44.83 47.75 51.46 54.30 58.17 63.25 67.33 72.80 80.10 86.11 94.40

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

106.00 115.78 129.66 148.40 165.09 190.23 225.71 261.11

105.16 115.07 128.21 146.73 164.01 187.30 222.78 257.68

105.58 115.48 128.72 147.56 164.37 188.21 223.74 258.90

Table 3 : Values for K I

for all steps (28) growth.

49