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Article
Implementation of a Plastically Dissipated Energy Criterion for Three Dimensional Modeling of Fatigue Crack Growth
International Journal of Fatigue
  • Parag G. Nittur, University of Delaware
  • Anette M Karlsson, Cleveland State University
  • Leif A. Carlsson, Florida Atlantic University
Document Type
Article
Publication Date
9-1-2013
Abstract
Fatigue crack growth is simulated using three dimensional elastic-plastic finite element analysis. The crack extension per load cycle, da/dN, as well as crack front profile changes (crack tunneling) under cyclic loading is not specified as an input but evaluated based on a condition that relates plastically dissipated energy to a critical value. Simulation of cyclic crack propagation in a middle-crack tension M(T) specimen using this implementation captures the well established, experimentally obtained crack growth rate reduction accompanying a single overload event. The analysis predicts that the single overload also affects the crack front profile, where a tunneling crack propagates with a flatter crack front in the overload affected zone.
DOI
10.1016/j.ijfatigue.2013.04.011
Version
Postprint
Citation Information
Nittur, P. G., Karlsson, A. M., and Carlsson, L. A., 2013, "Implementation of a Plastically Dissipated Energy Criterion for Three Dimensional Modeling of Fatigue Crack Growth," International Journal of Fatigue, 54pp. 47-55.