Issue 43

E. Maiorana et alii, Frattura ed Integrità Strutturale, 43 (2018) 205-217; DOI: 10.3221/IGF-ESIS.43.16 211 Figure 3 : Test of the blasted specimen. Figure 4 : F Si [kN] vs. δ [mm] relationship. From the ten values obtained by the tests, the mean value of the slip factor was calculated  m = 0.519 with the standard deviation s  = 0.030, finally a characteristic value  k = 0.454 was achieved. Fig. 5 shows the test results. Figure 5 : Blasted and close specimens. Dashed line: mean value  m ; continuous line:  k .