Crack Paths 2006

The initial conditions were set in such a way that for any of chosen :0 values, the

constant value of Z0 was randomly distributed over the structure’s body. The results for

all 25 combinations of initial parameters are illustrated by the following figures.

12468020 %

:

t1/t10

0,0035

0,0070

0,0109

0,0145

0,0180

0

0,2

0,4

0,6

0,8

1

Z

Fig. 2. Time to first crack appearance t1 as a function of Z0 for five initial values of :0

Comment:reduction of t1 in comparison with t10 for a plate of zero initial values is

almost independent of Z0 except its value of 0.9, for which reduction is dramatic (up to

five-folds). Meanvalue of reduction is about 30%.

100%

:

89 826 % t2/t20

0,003750

0,0109

0,0145

8 4 %

0,0180

8 0 %

0

0,2

0,4

0,6

0,8

1

Z

Fig. 3. Time to crack proliferation t2 as a function of Zo for five initial

values of :o