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A simplified method for parameters calibration of the new local approach model for cleavage fracture in a ferritic steel

文献类型：期刊论文

作者Shen AR3; Li PC3; Wang KY3; Qian GA(钱桂安)2; Berto F1
刊名THEORETICAL AND APPLIED FRACTURE MECHANICS
出版日期2019-04-01
卷号100页码:426-433
关键词Parameters calibration NLAM Cleavage fracture Weibull parameters Threshold coefficient of fracture process zone
ISSN号0167-8442
DOI10.1016/j.tafmec.2019.02.004
通讯作者Li, Peichao(wiselee18@163.com) ; Qian, Guian(qianguian@imech.ac.cn)
英文摘要This work presents a simplified method for parameters calibration of the new local approach model (NLAM) for cleavage fracture in a ferritic steel. Based on the Beremin model, a NLAM was recently proposed by Lei (2016) to calculate the Weibull parameters. Although the above NLAM proves to be mathematically and physically self-consistent, yet there are still no reliable and convenient methods to calibrate the model parameters. Considering the plastic volume is determined by the threshold coefficient of fracture process zone lambda, we adopt four different values of lambda in this work to calculate the plastic volume so as to obtain four groups of calibrated Weibull parameters. The material used in this study is the pressure vessel steel 20MnMoNi55 with some published strength data under two subzero temperatures. And the finite element analysis FEA) software ABAQUS is employed to obtain the stress distributions, then the calibration results for four different values of lambda are compared and analyzed. These efforts show that taking lambda = 1.5 is a more reasonable and reliable choice.
分类号二类
WOS关键词WEIBULL STRESS ; BEREMIN MODEL ; TEMPERATURE-DEPENDENCE ; BRITTLE-FRACTURE ; TOUGHNESS ; CONSTRAINT ; PREDICTION ; TRANSFERABILITY ; REGION
资助项目National Natural Science Foundation of China[11872364]
WOS研究方向Engineering ; Mechanics
语种英语
WOS记录号WOS:000462107700041
资助机构National Natural Science Foundation of China
其他责任者Li, Peichao ; Qian, Guian
源URL[http://dspace.imech.ac.cn/handle/311007/78937]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Norwegian Univ Sci & Technol NTNU, Dept Mech & Ind Engn, Richard Birkelands Vei 2b, N-7491 Trondheim, Norway
2.Chinese Acad Sci, State Key Lab Nonlinear Mech LNM, Inst Mech, Beijing 100190, Peoples R China;
3.Shanghai Univ Engn Sci, Sch Mech & Automot Engn, Shanghai 201620, Peoples R China;
推荐引用方式
GB/T 7714		 Shen AR,Li PC,Wang KY,et al. A simplified method for parameters calibration of the new local approach model for cleavage fracture in a ferritic steel[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2019,100:426-433.
APA Shen AR,Li PC,Wang KY,钱桂安,&Berto F.(2019).A simplified method for parameters calibration of the new local approach model for cleavage fracture in a ferritic steel.THEORETICAL AND APPLIED FRACTURE MECHANICS,100,426-433.
MLA Shen AR,et al."A simplified method for parameters calibration of the new local approach model for cleavage fracture in a ferritic steel".THEORETICAL AND APPLIED FRACTURE MECHANICS 100(2019):426-433.

入库方式： OAI收割

来源：力学研究所

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