Issue 43

E. Maiorana et alii, Frattura ed Integrità Strutturale, 43 (2018) 205-217; DOI: 10.3221/IGF-ESIS.43.16 213 Figure 8 : Test of the blasted and coated specimen. Figure 9 : Blasted, painted with product n.4. Dashed line: mean value  m ; continuous line:  k Figure 10 : Blasted, painted with product n.5. Dashed line: mean value  m ; continuous line:  k To increase the slip factor as much as possible, an applicative procedure was performed in order to check the effective correlation between the preload and the tightening torque because of the potentially great variability of the friction coefficient k .