Issue 51

G. Ramaglia et alii, Frattura ed Integrità Strutturale, 51 (2020) 288-312; DOI: 10.3221/IGF-ESIS.51.23 308 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 [-] S18 264 265 560 Glass 1 0.48 9.97 6.22 1.604 S19 267 265 560 Glass 1 0.48 8.53 6.22 1.372 S20 266 265 560 Glass 1 0.48 11.29 6.22 1.817 S21 266 266 560 Basalt 1 0.24 10.40 6.22 1.673 S22 265 264 560 Basalt 1 0.24 9.82 6.22 1.580 S23 265 264 560 Basalt 1 0.24 10.20 6.22 1.640 Table 3.B : Geometrical characteristics and experimental results [34]. 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] S18 2.48 5.80 2.48 0.399 5.81 2.48 0.399 S19 2.46 5.75 2.46 0.395 5.77 2.47 0.397 S20 2.47 5.77 2.47 0.397 5.79 2.47 0.398 S21 1.40 3.27 1.40 0.225 3.27 1.40 0.225 S22 1.40 3.29 1.40 0.226 3.29 1.41 0.226 S23 1.40 3.29 1.40 0.226 3.29 1.41 0.226 Table 4.B : Effective confining stress calculated according to Eqns. (13) and (18) for the experimental program, [34]. 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 [-] S24 54 54 85 Carbon 0.125 0.0206 20.63 13.58 1.519 S25 54 54 85 Carbon 0.25 0.0413 27.38 13.58 2.016 S26 54 54 85 Carbon 0.167 0.0275 22.80 13.58 1.679 Table 5.B : Geometrical characteristics and experimental results [35]. 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] S24 0.15 2.62 0.40 0.0292 2.62 0.40 0.0292 S25 0.15 5.24 0.79 0.0583 5.24 0.79 0.0583 S26 0.15 3.49 0.53 0.0389 3.49 0.53 0.0389 Table 6.B : Effective confining stress calculated according to Eqns. (13) and (18) for the experimental program [35]. 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 [-] S27 240 240 500 Carbon 1 0.131 13.374 5.295 2.526 S28 240 240 500 Carbon 2 0.262 14.922 5.295 2.818 S29 240 240 500 Glass 2 0.34 12.142 5.295 2.293 S30 240 240 500 Glass 3 0.51 13.215 5.295 2.496 S31 240 240 500 Carbon 1 0.131 4.751 3.299 1.440 S32 240 240 500 Carbon 2 0.262 5.279 3.299 1.600 S33 240 240 500 Glass 2 0.34 5.930 3.299 1.798 S34 240 240 500 Glass 3 0.51 5.948 3.299 1.803 Table 7.B : Geometrical characteristics and experimental results [36].