Issue 38

M.V. Karuskevich et alii, Frattura ed Integrità Strutturale, 38 (2016Y) 205-214; DOI: 10.3221/IGF-ESIS.38.28

proves the possibility of their successful application for the sake of technical diagnostic procedures. The curve to characterize the dependence of the damaged area (S) versus the Shannon entropy (H) exhibit a non-linear character that is related to the difference in their nature as well the background to affect these parameters.

S , %

H

10 12 14 16 18

III

0.7

III

II

0.6

II

0.5

I

0.4

I

0 2 4 6 8

0.3

0.2

0.1

1 2

0

4·10 5

8·10 5

0

4·10 5

8·10 5

N, cycles

0

N, cycles

а b Figure 2 : Dependence of the deformed (damaged) area (S) – (a) , and the Shannon entropy (H) – (b) vs the number of cycles .

40 S , %

III

H

III

1.0

II

II

30

0.8

I

I

0.6

20

0.4

1 2

10

0.2

0

0

4·10 5

4·10 5

6·10 5

2·10 5

0

6·10 5

2·10 5

0

N, cycles

N, cycles

а

b

H

1.0

0.8

0.6

0.4

0.2

0

0

5

10

15

20

25

30

35

40

S , %

c Figure 3 : Dependence of the damaged area (S) – (a) and the Shannon entropy (H) – (b) versus the number of cycles and the S – to - H ration under cyclic bending. Images were taken from the right (1) and left (2) sides from the stress concentrator

209