Issue 51

G. Ramaglia et alii, Frattura ed Integrità Strutturale, 51 (2020) 288-312; DOI: 10.3221/IGF-ESIS.51.23 312 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 [-] S67 250 250 500 Glass 1 0.48 19.65 13.72 1.432 Table 15.B : Geometrical characteristics and experimental results [40]. 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] S67 0.38 6.16 2.37 0.173 6.16 2.37 0.173 Table 16.B : Effective confining stress calculated according to Eqns. (13) and (18) for the experimental program, [40].