PSI - Issue 28

G. Clerc et al. / Procedia Structural Integrity 28 (2020) 1761–1767 Gaspard Clerc/ Structural Integrity Procedia 00 (2020) 000–000

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shall also be noted that the maximum available force from the testing apparatus was 17 kN. It can be suspected that the rupture force would continue to increase, but this should be verified with a better suited force sensor. 3.1. Consideration about the crack stability between the 3-ENF and the 3-CCF sample For the 3-ENF, if the crack length is chosen according to equation 11, the following crack growth curves are typically obtained.

2500

VN 3158 (N=3) HB 110 (N=4) PRF (N=4)

2000

1500

2 ]

G II [J/m

1000

500

60 70 80 90 100 110 120 130 140 Crack length [mm] 0

Figure 4: Example of crack propagation for the 3-ENF sample

In comparison the crack growth of the 3-CCF is shown in figure 5.

Figure 5: Example of load-deformation curve corresponding to crack propagation for the 3-CCF.