Paper Title:
Cyclic Plasticity and Fatigue Crack Growth
  Abstract

The relation between material’s cyclic plastic behavior and fatigue crack growth is investigated. The present model is proposed on the dislocation-free zone (DFZ) theory. A cohesive zone theory is developed to determine the stress field of the DFZ and the value of J-integer under cyclic loading. The crack growth criterion is proposed based on J-integral. The calculated curve of fatigue crack growth rate da/dN is agreement with the general propagation pattern and the predicted threshold accords with the experiment threshold well. It is found that the near threshold characteristics are most determined by the cyclic deformation behavior of the material. The relation between fatigue crack growth threshold and material’s cyclic hardening behavior is discussed.

  Info
Periodical
Key Engineering Materials (Volumes 324-325)
Edited by
M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz
Pages
603-606
DOI
10.4028/www.scientific.net/KEM.324-325.603
Citation
R. Zhang, S. Yi, "Cyclic Plasticity and Fatigue Crack Growth", Key Engineering Materials, Vols. 324-325, pp. 603-606, 2006
Online since
November 2006
Authors
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Price
$32.00
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