Issue 51

G. Ramaglia et alii, Frattura ed Integrità Strutturale, 51 (2020) 288-312; DOI: 10.3221/IGF-ESIS.51.23 311 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 [-] S53 115 115 340 Carbon 1 0.117 13.63 12.07 1.129 S54 115 115 340 Carbon 2 0.234 16.92 12.07 1.402 S55 115 115 340 Carbon 3 0.351 25.42 12.07 2.106 S56 115 115 340 Glass 5 0.750 40.00 12.07 3.314 S57 115 115 340 Carbon 1 0.117 16.87 12.07 1.398 S58 115 115 340 Carbon 2 0.234 23.91 12.07 1.981 S59 115 115 340 Carbon 3 0.351 34.69 12.07 2.874 S60 115 115 340 Glass 5 0.750 44.87 12.07 3.717 S61 172.5 115 340 Carbon 2 0.234 11.90 6.65 1.789 S62 172.5 115 340 Carbon 3 0.351 17.29 6.65 2.600 S63 172.5 115 340 Glass 5 0.750 24.37 6.65 3.665 S64 230 115 340 Carbon 2 0.234 11.79 6.21 1.899 S65 230 115 340 Carbon 3 0.351 12.00 6.21 1.932 S66 230 115 340 Glass 5 0.750 17.81 6.21 2.868 Table 13.B : Geometrical characteristics and experimental results [39]. 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] S53 0.44 7.02 3.09 0.256 7.02 3.09 0.256 S54 0.44 14.24 6.28 0.520 14.24 6.28 0.520 S55 0.44 21.37 9.41 0.780 21.37 9.41 0.780 S56 0.44 26.09 11.49 0.952 26.09 11.49 0.952 S57 0.53 7.12 3.80 0.314 7.12 3.80 0.314 S58 0.53 14.24 7.59 0.629 14.24 7.59 0.629 S59 0.53 21.37 11.39 0.943 21.37 11.39 0.943 S60 0.53 26.09 13.90 1.152 26.09 13.90 1.152 S61 0.37 9.50 3.50 0.526 11.87 4.37 0.657 S62 0.37 14.24 5.25 0.789 17.80 6.56 0.986 S63 0.37 17.39 6.41 0.963 21.74 8.01 1.204 S64 0.25 7.12 1.77 0.285 10.68 2.66 0.428 S65 0.25 10.68 2.66 0.428 16.02 3.98 0.642 S66 0.25 13.04 3.24 0.522 19.57 4.87 0.783 Table 14.B : Effective confining stress calculated according to Eqn. (13) and (18) for the experimental program, [39].