Issue 41

F. Berto et alii, Frattura ed Integrità Strutturale, 41 (2017) 79-89; DOI: 10.3221/IGF-ESIS.41.12 83 Table 1 : Experimental results from fatigue tests. Mean values, P s = 50%. Stresses referred to the net area. Series Type of load Number of specimens k T σ T τ σ a or τ a 2 · 10 6 1 Tension R = -1 12 σ 9.25 1.120 475.74 2 Torsion R = -1 16 τ 22.13 1.205 388.25 3 Torsion R = 0 9 τ 15.03 1.322 287.22 4 Tension R = -1, V-notch 2α = 90° 15 σ 6.26 1.133 100.89 5 Torsion R = -1, V-notch 2α = 90° 9 τ 14.59 1.229 289.31 6 Torsion R = 0, V-notch 2α = 90° 11 τ 13.82 1.159 247.16 7 Torsion R = 0.5, V-notch 2α = 90° 7 τ 19.91 1.080 169.89 8 Multiaxial R = -1, Ф = 0°, λ= 0.6, V-notch 2α = 90° 13 σ 6.82 1.197 93.89 τ 56.39 9 Multiaxial R = -1, Ф = 90°, λ = 0.6, V-notch 2α = 90° 10 σ 7.84 1.124 96.11 τ 57.67 10 Multiaxial R = 0, Ф = 0°, λ = 0.6, V-notch 2α = 90° 12 σ 8.09 1.159 67.74 τ 40.64 11 Multiaxial R = 0, Ф = 90°, λ = 0.6, V-notch 2α = 90° 12 σ 10.43 1.158 79.65 τ 47.79 12 Torsion R = 0.5 12 τ 21.19 1.134 180.73 13 Torsion R = 0.25 8 τ 25.67 1.078 268.12 14 Torsion R = -3 7 τ 16.25 1.178 357.55 15 Torsion R = -2 8 τ 21.32 1.042 409.01 16 Multiaxial R = -1, Ф = 0°, λ = 2, V-notch 2α = 90° 26 σ τ 7.61 1.118 75.94 37.97 17 Multiaxial R = -1, Ф = 90°, λ = 2, V-notch 2α = 90° 22 σ τ 7.59 1.114 84.70 42.35 18 Multiaxial R = 0, Ф = 0°, λ = 2, V-notch 2α = 90° 21 σ τ 8.01 1.125 59.75 29.88 19 Multiaxial R = 0, Ф = 90°, λ = 2, V-notch 2α = 90° 21 σ τ 9.40 1.089 65.97 32.99