PSI - Issue 13

Vitor Scarabeli Barbosa et al. / Procedia Structural Integrity 13 (2018) 367–372 Author name / Structural Integrity Procedia 00 (2018) 000 – 000

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influence of constraint loss on measured fracture toughness for the PCVN configuration and on T 0 . Clearly, these latter results are strongly suggestive of the effectiveness of the non-standard PCVN geometry with increased span in mitigating the effects of constraint loss on T 0 -estimates often observed in standard PCVN configurations.

Fig. 2. Cumulative Weibull distribution of experimentally measured J c -values of the A572 Gr 50 steel for all tested PCVN fracture specimens.

Fig. 3. Master curves for the tested ASTM A572 Gr 50 steel including 5% and 95% confidence bounds based on cleavage fracture toughness values measured from (a) standard 1 SE(B) specimens with a/W = 0.5; (b) PCVN specimens with S/W = 4; (c) side-grooved PCVN specimens with S/W = 6; (d) PCVN specimens with S/W = 8.