Issue 51

G. Ramaglia et alii, Frattura ed Integrità Strutturale, 51 (2020) 288-312; DOI: 10.3221/IGF-ESIS.51.23

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

[-]

S1 S2 S3 S4 S5 S6 S7 S8 S9

250 250 250 250 250 380 387 377 383 377 383 250 250 250 248 245 246

250 250 250 250 250 383 375 380 378 378 374 248 249 247 247 248 251

500 250 250 250 250 492 485 488 486 481 492 470 470 470 462 471 473

GFRP (type a) GFRP (type a) GFRP (type a) GFRP (type a) GFRP (type a) GFRP (type b) GFRP (type b) GFRP (type b) GFRP (type b) GFRP (type b) GFRP (type b) GFRP (type b) GFRP (type b) GFRP (type b) GFRP (type b) GFRP (type b) GFRP (type b)

1 1 1 2 2 1 1 1 2 2 2 1 1 1 2 2 2

0.48 0.48 0.48 0.96 0.96 0.23 0.23 0.23 0.46 0.46 0.46 0.23 0.23 0.23 0.46 0.46 0.46

19.29 26.23 21.21 35.18 30.52 12.03 12.79 14.15 14.52 16.01 12.64 17.65 16.27 15.94 19.10 20.57 21.45

13.71 13.98 13.98 13.98 13.98

1.407 1.876 1.518 2.517 2.184 1.426 1.518 1.678 1.723 1.899 1.499 1.588 1.463 1.434 1.718 1.850 1.929

8.3 8.3 8.3

8.43 8.43 8.43

S10 S11 S12 S13 S14 S15 S16 S17

11.12 11.12 11.12 11.12 11.12 11.12

Table 1.B : Geometrical characteristics and experimental results [33].

k eff [-]

f l,(eq.13) [MPa] 9.830 9.830 9.830 19.661 19.661

f l,eff,(eq.13) [MPa]

(f l,eff

/ f m0

), (eq.13)

f l, (eq.18) [MPa] 9.830 9.830 9.830 19.661 19.661

f l,eff, (eq.18) [MPa]

(f l,eff

/ f m0

), (eq.18)

ID specimen

[MPa] 0.276 0.271 0.271 0.541 0.541 0.095 0.094 0.096 0.190 0.192 0.190 0.121 0.121 0.121 0.244 0.244 0.240

[MPa] 0.276 0.271 0.271 0.541 0.541 0.095 0.095 0.096 0.191 0.193 0.192 0.121 0.121 0.121 0.244 0.245

S1 S2 S3 S4 S5 S6 S7 S8 S9

0.38 0.38 0.38 0.38 0.38 0.42 0.42 0.42 0.42 0.42 0.42 0.46 0.46 0.46 0.46 0.46 0.46

3.782 3.782 3.782 7.565 7.565 0.799 0.790 0.806 1.598 1.622 1.599 1.342 1.341 1.342 2.709 2.712 2.673

3.782 3.782 3.782 7.565 7.565 0.802 0.803 0.809 1.609 1.624 1.619 1.347 1.344 1.350 2.715 2.728 2.701

1.922 1.902 1.937 3.843 3.894 3.843 2.944 2.944 2.944 5.935 5.935 5.865

1.929 1.932 1.945 3.869 3.899 3.890 2.956 2.950 2.962 5.947 5.972 5.924

S10 S11 S12 S13 S14 S15 S16 S17

0.243 Table 2.B : Effective confining stress calculated according to Eqns. (13) and (18) for the experimental program, [33].

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