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Metals 2015, 5(2), 603-627; doi:10.3390/met5020603

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

1
Department of Naval Architecture and Ocean Engineering, Pusan National University, Busan 609-735, Korea
2
Hyundai Heavy Industries, Ulsan 682-792, Korea
3
Research Institute of ClassNK, Tokyo 102-8567, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 10 February 2015 / Revised: 8 April 2015 / Accepted: 10 April 2015 / Published: 20 April 2015
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Abstract

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 versusK and the crack length versus the number of cycles were compared. View Full-Text
Keywords: fatigue crack growth rate; damage mechanics; 7% nickel steel; cryogenic temperature; ABAQUS user-defined material subroutine (UMAT) fatigue crack growth rate; damage mechanics; 7% nickel steel; cryogenic temperature; ABAQUS user-defined material subroutine (UMAT)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kim, S.-K.; Lee, C.-S.; Kim, J.-H.; Kim, M.-H.; Noh, B.-J.; Matsumoto, T.; Lee, J.-M. Estimation of Fatigue Crack Growth Rate for 7% Nickel Steel under Room and Cryogenic Temperatures Using Damage-Coupled Finite Element Analysis. Metals 2015, 5, 603-627.

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