Out-of-plane constraint loss in three point bend specimens with notches

Horn, Anthony J.; Cicero, Sergio; Andres, David

doi:10.1016/j.ijpvp.2019.104025

Cited by 5 publications

(1 citation statement)

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“…The results show that different Weibull parameters will be obtained using notched specimens and conventional specimens containing pre-cracks. The test data and FE modeling results indicate that the effect of out-of-plane constraint loss on notch fracture toughness can be of the same order of magnitude as the in-plane effect of the notch radius alone (Horn et al, 2020). The local approach based on Weibull stress is also used to scale the fracture toughness of the sub-size specimens and compared with the standard specimens (Qian et al, 2018a;Ruggieri, 2020;Pan and Yin, 2021).…”

Section: Introductionmentioning

confidence: 99%

Scaled Fracture Toughness Based on the Weibull Stress for the Ferritic Steel Used in Nuclear Power Plants

Jin

Li²,

Li³

et al. 2022

Front. Mater.

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As an important material property in structural integrity assessment of nuclear power components, fracture toughness can be measured by single edge-notched bend (SENB) specimens or compact tension (CT) specimens. However, the tested values may be inhomogeneous with the crack size and specimen thickness. Some toughness scaling models (TSMs) were proposed to transfer the tested value to fracture toughness under small-scale yielding. Combined with the tested data by SENB specimens with different crack sizes and CT specimens with different thicknesses, the scaled fracture toughness is investigated on the global and local approaches to fracture. Using the scaled toughness values, the Weibull scale parameter K0 is estimated and compared for the ferritic steel DIN 22NiMoCr37 widely used in nuclear power plants. The results show that the estimated scale parameter K0 using the scaled toughness obtained by the global approach on the J-Q theory is reasonable in agreement with that of the local approach on the Weibull stress with a relative error of about 10%.

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Section: Introductionmentioning

confidence: 99%