Abstract
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.
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Nguyen, O., Repetto, E., Ortiz, M. et al. A cohesive model of fatigue crack growth. International Journal of Fracture 110, 351–369 (2001). https://doi.org/10.1023/A:1010839522926
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DOI: https://doi.org/10.1023/A:1010839522926