Acta Metall Sin  2011, Vol. 47 Issue (5): 594-600    DOI: 10.3724/SP.J.1037.2010.00711

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NUMERICAL SIMULATION OF HYDROGEN INDUCED DELAYED FRACTURE OF AISI4135 HIGH STRENGTH STEEL USING COHESIVE ZONE MODELING

WANG Yanfei1), GONG Jianming1), JIANG Wenchun2),  JIANG Yong1), TANG Jianqun1)

1) College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009 2) College of Mechanical and Electronic Engineering, China University of Petroleum, Dongying 257061

WANG Yanfei GONG Jianming JIANG Wenchun JIANG Yong TANG Jianqun . NUMERICAL SIMULATION OF HYDROGEN INDUCED DELAYED FRACTURE OF AISI4135 HIGH STRENGTH STEEL USING COHESIVE ZONE MODELING. Acta Metall Sin, 2011, 47(5): 594-600.

Abstract References Related Articles Recommended Metrics Download:  PDF(1336KB)  Export:  BibTeX | EndNote (RIS)       Abstract  High strength steels are susceptible to hydrogen induced delayed fracture (HIDF). A sequential coupling calculation on HIDF of high strength steel was developed based on cohesive zone modeling (CZM) using finite element program-ABAQUS. The calculation procedure contained three steps: elastic plastic stress analysis, stress assisted transient hydrogen diffusion and cohesive stress analysis using hydrogen dependent linear traction-separation law. Using this method, the prediction of fracture time and crack initiation location of pre-charged notched bar of AISI4135 high strength steel was obtained. The effects of stress concentration factor, initial hydrogen content, and tension load were also considered. The results show: (i) predictions of the time to fracture were in good quantitative agreement with the experimental results; the hydrogen dependent cohesive zone modeling can be used in prediction of failure in actual structures; (ii) crack initiation occurs when a critical hydrogen concentration at the location of stress peak is reached by accumulation, the critical hydrogen concentration is dependent on stress concentration factor and tension load, but independent of initial hydrogen content; (iii) as one of the three parameters mentioned above decreasing, the fracture initiation time and the critical hydrogen\linebreak concentration increase. Key words:  cohesive zone modeling (CZM)      hydrogen induced delayed fracture (HIDF)      high strength steel      hydrogen embrittlement      Received:  30 December 2010      ZTFLH:  TG457   Fund:  Supported by Foundation for Six Talents Peak of Jiangsu Province (No.06-D-035) Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors YU Yan-Fei GONG Jian-Ming JIANG Wen-Chun JIANG Yong TANG Jian-Qun URL:  https://www.ams.org.cn/EN/10.3724/SP.J.1037.2010.00711     OR     https://www.ams.org.cn/EN/Y2011/V47/I5/594 [1] Chu W Y, Qiao L J, Chen Q Z, Gao K W. Fracture and Environment Fracture. Beijing: Science Press, 2000: 126 (褚武扬, 乔利杰, 陈奇志, 高克玮. 断裂与环境断裂. 北京: 科学出版社, 2000: 126) [2] Serebrinsky S, Carter E A, Ortiz M. J Mech Phys Solids, 2004; 52: 2403 [3] Liang Y, Sofronis P. J Mech Phys Solids, 2003; 51: 1509 [4] Olden V, Thaulow C, Johnsen R, Φstby E, Berstad T. Eng Fract Mech, 2008; 75: 2333 [5] Olden V, Thaulow C, Johnsen R, Φstby E. 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