Issue 36

R. Tovo et alii, Frattura ed Integrità Strutturale, 36 (2016) 119-129 DOI: 10.3221/IGF-ESIS.36.10

Figure 5: Complete assembled fatigue specimen and clamping fixtures.

Figure 6: T he various parts of a single tube end clamping fixture.

Fig. 5 shows complete assembled fatigue specimen and clamping fixtures, while Fig. 6 shows the various parts of a single clamping fixture.

U NIAXIAL TENSILE FATIGUE TEST RESULTS

T

able 1 shows the fatigue data obtained from welded tube specimens tested at R = 0.1 at frequencies between 10- 25 Hz. Test run-out was deemed to have occurred if the specimen survived 2,000,000 load cycles.

Range [MPa] 102.90 82.32 61.74 56.60 51.45 56.60 56.60 51.45 56.60 102.94

Specimen

Cycles

Run out

W128 W122 W124 W120 W112 W129 W130 W117 W118 W113

67,970 96,400 466,154

1,167,540 2,000,000

x

37,991 222,671 709,775

1,247,627 2,000,000

x

Table 1: Fatigue data obtained at R = 0.1.

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