Issue 58

M. Achoui et alii, Frattura ed Integrità Strutturale, 58 (2021) 365-375; DOI: 10.3221/IGF-ESIS.58.26

0,01

WM (befor TTH) WMa (after TTH)

1E-3

Difference WMa/WM

1E-4

da/dN (mm/cycles)

1E-5

 Kc=60MPa m 1/2

Difference

1E-6

10

20

30

40 50 60 70 80 90100

 K (MPa m 1/2 )

Figure 9: Comparison ⁄ =f(  ) of FM longitudinal and transversal direction.

0,01

28

a-N (WMwithout precompression ) a-N (WM)

24

20

16

12

1E-3

a-a 0 mm

8

4

0

0,0

2,0x10 5

4,0x10 5

6,0x10 5

8,0x10 5

N (cycle)

1E-4

da/dN (mm/cycles)

1E-5

Number of cumulative cycles before propagation Nc = 280,000 cycles

WM WM (without precompression)

1E-6

10

20

30

40 50 60 70 80 90 100

Figure 10: Comparison ⁄ = f (  ) of FM With and without pre compression of the ligament.  K (MPa m 1/2 )

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