In this paper, a fatigue model formulated in the framework of the continuum damage mechanics (CDM) is presented. The model is based on an explicit definition of fatigue damage and introduces a kinematic damage differential equation formulated directly as a function of the number of cycles and the stress cycle parameters. The model is initially presented for uniaxial problems, which facilitates the identification of its constants. An extension of the fatigue model to multiaxial problems is also proposed. This model was implemented in a nonlinear finite element code in conjunction with a constitutive model for cyclic plasticity. The cyclic plasticity model considered is based on a J2-plasticity theory with nonlinear isotropic and kinematic hardenings. In order to enhance the description of the cyclic elastoplastic behavior, the superposition of several nonlinear kinematic hardening variables is suggested. Both fatigue and plasticity models are identified for the P355NL1 (TStE355) steel. Finally, the numerical model is used to predict the fatigue crack initiation for a welded nozzle-to-plate connection, made of P355NL1 steel, and results are compared with experimental fatigue data.
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Finite Element Modeling of Fatigue Damage Using a Continuum Damage Mechanics Approach
Abı´lio M. P. De Jesus,
Abı´lio M. P. De Jesus
Engineering Department—Mechanical Engineering, University of Tra´s-os-Montes and Alto Douro, Quinta de Prados, 5000-911 Vila Real, Portugal
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Alfredo S. Ribeiro,
Alfredo S. Ribeiro
Engineering Department—Mechanical Engineering, University of Tra´s-os-Montes and Alto Douro, Quinta de Prados, 5000-911 Vila Real, Portugal
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Anto´nio A. Fernandes
Anto´nio A. Fernandes
Rua Dr. Roberto Frias, 4200-Porto, Portugal University of Porto—Faculty of Engineering
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Abı´lio M. P. De Jesus
Engineering Department—Mechanical Engineering, University of Tra´s-os-Montes and Alto Douro, Quinta de Prados, 5000-911 Vila Real, Portugal
Alfredo S. Ribeiro
Engineering Department—Mechanical Engineering, University of Tra´s-os-Montes and Alto Douro, Quinta de Prados, 5000-911 Vila Real, Portugal
Anto´nio A. Fernandes
Rua Dr. Roberto Frias, 4200-Porto, Portugal University of Porto—Faculty of Engineering
Paper presented at the 2004 ASME Pressure Vessels and Piping Division Conference (PVP2004), July 25–29, 2004, San Diego, California, USA. Contributed by the Pressure Vessels and Piping Division for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received by the PVP Division October 18, 2004; revision received November 24, 2004. Review conducted by: S. Zamrik.
J. Pressure Vessel Technol. May 2005, 127(2): 157-164 (8 pages)
Published Online: May 27, 2005
Article history
Received:
October 18, 2004
Revised:
November 24, 2004
Online:
May 27, 2005
Citation
De Jesus, A. M. P., Ribeiro, A. S., and Fernandes, A. A. (May 27, 2005). "Finite Element Modeling of Fatigue Damage Using a Continuum Damage Mechanics Approach ." ASME. J. Pressure Vessel Technol. May 2005; 127(2): 157–164. https://doi.org/10.1115/1.1858927
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