Estimation of fracture toughness transition curves of RPV steels from Charpy impact test data

Kim, S.H; Park, Y.W; Kang, Sung-Sik; Chung, Hae-Dong

doi:10.1016/s0029-5493(01)00479-4

Cited by 23 publications

(3 citation statements)

References 6 publications

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“…In the elastic stage, the maximum stress and strain on the notch cross-section increase linearly with the deflection angle until the elastic limit is reached, so it can be obtained from equation (7) that…”

Section: Construction Of Mathematical Model Of V-notch Impactmentioning

confidence: 99%

“…Konopik et al [5] established the conversion relation between the impact test results of small-size impact specimens and full-size standard impact specimens based on the test results. Yang et al [6] used GA-NN combined model to predict the Charpy impact energy, and R. Muscat et al [7] used membership function modeling to predict the Charpy impact energy of heat-treated steel more accurately. Chaouadi and Fabry [8] did a preliminary study on the relation between the impact energy and the size of the simply supported rectangular cross-section structure under impact load, and the result of the study is that the impact energy is proportional to the section modulus in bending.…”

Section: Introductionmentioning

confidence: 99%

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Mathematical Model for Charpy Impact Energy of V‐Notch Specimens

Wang¹,

Wang²,

Liu³

et al. 2021

Advances in Materials Science and Engineering

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Firstly, by analyzing the response of Charpy V-notch specimen impacted by pendulum, the relationship between specimen geometry, material properties, and impact energy is established and simplified, and the mathematical model for evaluating impact energy of specimens with different sizes is established. Then, the effectiveness of the model through a series of impact tests is verified. Theoretical analysis and experimental results show that the relationship between ligament length and impact energy is quadratic, while the relationship between ligament thickness and impact energy is linear. In the derivation process, the intrinsic impact toughness is used to evaluate the toughness of materials. The mathematical model makes it possible to evaluate the impact energy of specimens with different sizes and provides a theoretical basis for evaluating the impact resistance of structures.

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Section: Construction Of Mathematical Model Of V-notch Impactmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mathematical Model for Charpy Impact Energy of V‐Notch Specimens

Wang¹,

Wang²,

Liu³

et al. 2021

Advances in Materials Science and Engineering

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“…Fracture toughness is scattered and probabilistic in nature in the DBT zone owing to embrittlement and several techniques 1–3 are used to characterize the same. A well-known technique is to find nil ductility temperature (NDT).…”

Section: Introductionmentioning

confidence: 99%

Finite element simulation of fracture toughness testing of 20MnMoNi55 steel and the effect of loading rate on reference temperature

Paul

Bhattacharjee

Acharyya

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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Fracture toughness of ferritic steel in the ductile-to-brittle transition zone is scattered and probabilistic owing to embrittlement. Use of master curve along with the reference temperature ( T0) adopted in ASTM E-1921 is widely accepted for characterization of this embrittlement. Reference temperature is a measure of embrittlement in the temperature scale. Factors affecting fracture toughness like geometry and loading rate are expected to influence the reference temperature. In the present study, the role of the loading rate on the reference temperature for 20MnMoNi55 steel is assessed experimentally using compact tension C(T) and three-point bend (TPB) specimens. Finite element simulation of tests at different loading rates and cryogenic temperature are carried out using a suitable viscoplastic material model that incorporates flow characteristics of the material for varying displacement rates and cryogenic temperatures. Results from simulation studies are compared with experimental ones.

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