Issue 64

Y. Zhang et alii, Frattura ed Integrità Strutturale, 64 (2023) 171-185; DOI: 10.3221/IGF-ESIS.64.11

Figure 4: P-CMOD curves of some specimens

Figure 5: Typical fracture cross section of three-point bending beams.

Figure 6: P- ε curves of some specimens

Initial cracking toughness （ ） and unstable cracking toughness （ ） The initial cracking toughness ini IC K un IC K ini IC (K )

ini P

can be calculated by bringing the test measured

and the initial notch crack length

( ) 0 a

into our current regulations [30]:

(

)

2 3 P+mg/2 S 2H B

      a H

(1)

K =

aF

I

I

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