Statistical analysis of cleavage fracture ahead of sharp cracks and rounded notches

On the statistical analysis of local fracture stresses in notched bars

“…Since the sizes of the cleavage-initiating inclusions in the highly stressed test volume may possibly vary from specimen to specimen, a degree of scatter in F values could potentially be expected at any given temperature. For the as-received condition, similar values of F have been obtained for C-Mn weld metals (McRobie, 1985) and for a wrought mild steel (Lin et al, 1986b).…”

Prediction of fracture toughness of ceramic composites as function of microstructure: I. Numerical simulations

“…Specifically, it has been reported that particle cracking is more prevalent in composites with higher particle volume fractions (Kumai et al, 1991). The lower fracture toughness values at larger particle sizes are a result of an increased likelihood of particle cracking (Evans, 1990;Lin et al, 1986). Although crack penetration through a particle requires a higher instantaneous K value than crack growth through interfacial debonding, particle cracking usually signifies immediate catastrophic failure.…”

Cleavage fracture and irradiation embrittlement of fusion reactor alloys: mechanisms, multiscale models, toughness measurements and implications to structural integrity assessment

“…However, in at least two cases, r à was approximately constant up to temperatures of %100°C [31,42]. Interpretation of these results is complicated by the fact that the r à , or corresponding statistical model Weibull strength parameters, are different for blunt notches compared to the A à -V à cleavage criterion for cracks [39,40,66]. Cracks have higher, but more spatially localized, distributions of r n compared to the notches with lower but more broadly distributed stress fields.…”