International Journal of Fracture

, Volume 110, Issue 4, pp 351–369 | Cite as

A cohesive model of fatigue crack growth

  • O. Nguyen
  • E.A. Repetto
  • M. Ortiz
  • R.A. Radovitzky


We investigate the use of cohesive theories of fracture, in conjunction with the explicit resolution of the near-tip plastic fields and the enforcement of closure as a contact constraint, for the purpose of fatigue-life prediction. An important characteristic of the cohesive laws considered here is that they exhibit unloading-reloading hysteresis. This feature has the important consequence of preventing shakedown and allowing for steady crack growth. Our calculations demonstrate that the theory is capable of a unified treatment of long cracks under constant-amplitude loading, short cracks and the effect of overloads, without ad hoc corrections or tuning.

Cohesive law fatigue finite elements overload short cracks. 


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Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • O. Nguyen
    • 1
  • E.A. Repetto
    • 1
  • M. Ortiz
    • 1
  • R.A. Radovitzky
    • 1
  1. 1.Graduate Aeronautical LaboratoriesCalifornia Institute of TechnologyPasadenaUSA

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