Estimation of Fracture Toughness for A508-III Steel in Ductile-to-Brittle Transition Region Using a Strain-Energy-Density-Based Fracture Failure Model

被引：2
|
作者：
Wu, Yuanjun [1 ]
Bao, Chen [1 ]
Cai, Lixun [1 ]
Wang, Kaiqing [2 ]
Liu, Xiao [2 ]
机构：
[1] Southwest Jiaotong Univ, Sch Mech & Aerosp Engn, Appl Mech & Struct Safety Key Lab Sichuan Prov, Chengdu 610031, Peoples R China
[2] Nucl Power Inst China, Sci & Technol Reactor Fuel & Mat Lab, Chengdu 610213, Peoples R China
来源：
ACTA MECHANICA SOLIDA SINICA | 2022年 / 35卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Fracture toughness; Cumulative failure probability; A508-III steel; Ductile-to-brittle transition region; STATISTICAL LOCAL CRITERION; CLEAVAGE FRACTURE; ENGINEERING METHODOLOGY; CONSTRAINT CORRECTIONS; PROBABILISTIC MODEL; PLASTIC STRAIN; PART II; PREDICTION; CALIBRATION;
D O I：
10.1007/s10338-022-00321-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
According to the assumption of intrinsic relationship between ultimate strain energy density and microcrack nucleation, this work developed a fracture failure model to estimate the fracture toughness of A508-III steel in the ductile-to-brittle transition region. The fracture toughness and uniaxial tension tests at different temperatures were carried out to determine the relationship between nucleation parameter and ultimate strain energy density, from which the evolutions of fracture toughness of A508-III ferritic steel for different cumulative failure probabilities at different temperatures were predicted. The fracture failure model can well describe the fracture toughness distribution of A508-III steel in the ductile-to-brittle transition region. Compared with the master curve method, this model has better temperature adaptability. It is more convenient to calibrate the parameters of this model compared with the traditional Beremin model, and without complex finite element analysis.
引用
收藏
页码：834 / 841
页数：8
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