Issue 51

G. Ramaglia et alii, Frattura ed Integrità Strutturale, 51 (2020) 288-312; DOI: 10.3221/IGF-ESIS.51.23 310 ID specimen k eff [-] f l,(eq.13) [MPa] f l,eff,(eq.13) [MPa] (f l,eff / f m0 ), (eq.13) [MPa] f l, (eq.18) [MPa] f l,eff, (eq.18) [MPa] (f l,eff / f m0 ), (eq.18) [MPa] S35 0.29 0.47 0.14 0.025 0.73 0.22 0.039 S36 0.29 1.31 0.39 0.069 2.06 0.61 0.108 S37 0.29 0.24 0.07 0.012 0.37 0.11 0.020 S38 0.29 0.56 0.17 0.030 0.88 0.26 0.046 S39 0.48 0.86 0.41 0.112 1.05 0.50 0.136 S40 0.48 0.86 0.41 0.231 1.05 0.50 0.281 S41 0.48 0.86 0.41 0.268 1.05 0.50 0.326 S42 0.24 0.32 0.08 0.012 0.53 0.13 0.021 S43 0.24 0.89 0.21 0.035 1.49 0.36 0.058 S44 0.24 0.38 0.09 0.015 0.63 0.15 0.024 S45 0.44 0.64 0.28 0.062 0.65 0.29 0.062 S46 0.44 0.89 0.39 0.085 0.89 0.40 0.086 S47 0.43 0.62 0.27 0.063 0.66 0.29 0.066 S48 0.43 1.71 0.74 0.172 1.80 0.78 0.181 Table 10.B : Effective confining stress calculated according to Eqn. (13) and (18) for the experimental program, [37]. ID specimen b [mm] d [mm] h [mm] Type of fiber [-] n l [-] t eq [mm] f mc [MPa] f m0 [MPa] f mc /f mc0 [-] S49 245 250 500 Carbon-HT 2 0.330 24.39 14.63 1.667 S50 245 250 500 Carbon-VHM 2 0.286 22.37 14.63 1.529 S51 245 250 500 Carbon-HT 2 0.330 29.99 14.63 2.050 S52 245 250 500 Carbon-VHM 2 0.286 26.84 14.63 1.835 Table 11.B : Geometrical characteristics and experimental results [38]. ID specimen k eff [-] f l,(eq.13) [MPa] f l,eff,(eq.13) [MPa] (f l,eff / f m0 ), (eq.13) [MPa] f l, (eq.18) [MPa] f l,eff, (eq.18) [MPa] (f l,eff / f m0 ), (eq.18) [MPa] S49 0.33 8.944 0.204 0.204 9.04 3.01 0.206 S50 0.33 4.473 0.102 0.102 4.52 1.51 0.103 S51 0.44 8.944 0.267 0.267 9.04 3.94 0.270 S52 0.44 4.473 0.134 0.134 4.52 1.97 0.135 Table 12.B : Effective confining stress calculated according to Eqn. (13) and (18) for the experimental program, [38].