Issue 36

R. Tovo et alii, Frattura ed Integrità Strutturale, 36 (2016) 119-129 DOI: 10.3221/IGF-ESIS.36.10 123 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 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. Specimen Range [MPa] Cycles Run out W128 102.90 67,970 W122 82.32 96,400 W124 61.74 466,154 W120 56.60 1,167,540 W112 51.45 2,000,000 x W129 102.94 37,991 W130 56.60 222,671 W117 56.60 709,775 W118 51.45 1,247,627 W113 56.60 2,000,000 x Table 1: Fatigue data obtained at R = 0.1. T