Numerical and experimental analyses of the plasticity-induced fatigue crack growth in high-strength steels
DOI: 10.1016/j.conbuildmat.2011.04.025
Title: Numerical and experimental analyses of the plasticity-induced fatigue crack growth in high-strength steels
Journal Title: Construction and Building Materials
Volume: 25
Issue: 10
Publication Date: October 2011
Start Page: 3935
End Page: 3940
Published online: online 18 May 2011
ISSN: 0950-0618
Author: J. Toribioa, V. Kharina, F.J. Ayasoa, B. Gonzáleza, J.C. Matosb, D. Vergarac, M. Lorenzod
Affiliations:

  • a Department of Materials Engineering, University of Salamanca, E.P.S., Avda. Requejo 33, 49022 Zamora, Spain

  • b Department of Computing Engineering, University of Salamanca, E.P.S., Avda. Requejo 33, 49022 Zamora, Spain

  • c Department of Mechanical Engineering, University of Salamanca, E.P.S., Avda. Requejo 33, 49022 Zamora, Spain

  • d Department of Mechanical Engineering, University of Salamanca, E.T.S.I.I., Avda. Fernando Ballesteros 2, 37700 Béjar, Spain
  • Abstract: l analyses of plasticity-induced fatigue crack growth (FCG) were performed for high-strength steels. FCG proceeds by large crack tip deformations promoting transfer of material from the tip apex to the crack flanks, thus rendering plastic crack growth based on plastic deformations without bond breaking or material splitting at the crack tip (Laird–Smith mechanism of FCG by blunting and re-sharpening). Plastic FCG rates (da/dN)p were obtained and numerical results were fitted with a Paris-like equation (da/dN)p = CΔKm. An experimental validation of the simulations was performed by comparing the numerical Paris-like equation with real (experimental) Paris equations in the steels.
    Accepted: 14 April 2011
    Received: 22 October 2010
    Revised: 22 March 2011
    Keywords: Cyclic loading; Crack tip; Ductile crack growth; Fatigue; Finite element method; Large deformations; Numerical simulation; Paris-like equation
    Tel: +34 980 54 50 00x3634
    Fax: +34 980 54 50 02
    Email: toribio@usal.es

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