Estimation of Fatigue Crack Growth Rate for 7% Nickel Steel under Room and Cryogenic Temperatures Using Damage-Coupled Finite Element Analysis

Metals

Seul-Kee Kim³  Chi-Seung Lee³  Jeong-Hyeon Kim³  Myung-Hyun Kim³  Byeong-Jae Noh¹  Toshyuki Matsumoto²  Jae-Myung Lee³ 

[1] Hyundai Heavy Industries, Ulsan 682-792, Korea; E-Mail:;Research Institute of ClassNK, Tokyo 102-8567, Japan; E-Mail:;Department of Naval Architecture and Ocean Engineering, Pusan National University, Busan 609-735, Korea; E-Mails:

关键词: fatigue crack growth rate;    damage mechanics;    7% nickel steel;    cryogenic temperature;    ABAQUS user-defined material subroutine (UMAT);   

DOI  :  10.3390/met5020603

来源: mdpi

【 摘 要 】

In this study, fatigue crack growth rates (FCGR) of 7% nickel steel at room and cryogenic temperatures were evaluated using damage-coupled finite element analysis (FEA). In order to perform the computational fatigue analysis effectively, methods for coupling damage to FEA are introduced and adopted. A hybrid method including the damage-coupled constitutive model and jump-in-cycles procedure was implemented into the ABAQUS user-defined material subroutine. Finally, the represented method was validated by comparing its results with the FCGR test results for 7% nickel steel under room and cryogenic temperatures. In particular, da/dN versus ∆K and the crack length versus the number of cycles were compared.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.