Weibull probability distribution for reactor steel 20MnMoNi55 cleavage fracture in transition temperature

A scaling approach to size effect modeling of J CDF for 20MnMoNi55 reactor steel in transition temperature region

“…1) is considered that characteristic dimension throughout this study. Nonetheless, the three-dimensional (3-D) geometric similarity of the C(T) specimens, used in the testing program reported by Djordjevic et al [13,33], implies that W/B = const., where B is the net C(T) specimen thickness. Therefore, the results obtained herein can be straightforwardly rewritten with B as the characteristic dimension.…”

“…Finally, in view of the example shown in Fig. 4, it could be argued that, bearing in mind the inherently strong data scatter [13,33], Eqs. ( 7) and ( 15) provide very reasonable CFD estimates well over the range of sizes that can be accurately tested (up to the thickness B ≈ 300÷400 mm) and useful lower-bounds somewhat beyond.…”