Issue 41

K. Slámečka et alii, Frattura ed Integrità Strutturale, 41 (2017) 123-128; DOI: 10.3221/IGF-ESIS.47.17 126 using the box charts. Additional information is shown in Tab. 3 that summarizes the mean values obtained for each material. Material N 0 0,a  (MPa) 0,a  (MPa) k 0 σ,τ m σ,τ A 2017A-T4 6.4×10 5 189 111 2.89 -7.1 21.9 S355J2WP 5.7×10 5 343 166 4.29 -7.9 25.9 S355J2G3 6.9×10 5 328 204 2.57 -8.9 28.2 Inc713LC 5.7×10 4 606 364 2.78 -5.7 20.5 30CrNiMo8 1.1×10 5 623 418 2.22 -12.2 39.1 Table 2 : Parameters related to the middle-curve criterion. Figure 2 : Comparison of experimental and predicted fatigue lives.