Issue 35

S. Blasón et alii, Frattura ed Integrità Strutturale, 35 (2016) 187-195; DOI: 10.3221/IGF-ESIS.35.22

Initial Lifetime (Cycles)

Stress (MPa)

Length (mm)

Runout

Expected Lifetime (Cycles)

450 400 350 380 400 390 395 395 395 425 425 395 395

106483 518308

53.88 53.88 53.88 53.88 53.88 53.88 53.88 53.88 53.88 53.88 53.88 53.88 53.88 54.88 55.88

2.876e+10 8.496e+07

10000002 21479001 1297002 10000000

R R

2.905e+07

R

133527 359216

2.449e+07

10000000

R

69554 974659 87004 298661 50698 112488 166587

437.5 437.5 412.5

56.88 Table 1 : Fatigue results from the resonance tests.

B

C

β

δ

λ

4.75 (115 cycles) 5.75 (312.7 MPa) 2.28 1.28 1.06 Table 2 : Weibull model parameters from fitting of the S-N field.

Figure 2 : S-N field assessment using the Profatigue software [6].

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