Published January 1, 2008 | Version v1
Conference paper Open

Fatigue crack growth analysis models for functionally graded materials

  • 1. Middle East Tech Univ, Dept Mech Engn, TR-06531 Ankara, Turkey
  • 2. Def Ind Res & Dev Inst, Struct Mech Div, Ankara 06261, Turkey
  • 3. Hacettepe Univ, Dept Engn Mech, Ankara 06800, Turkey

Description

The objective of this study is to develop crack growth analysis methods for functionally graded materials (FGMs) subjected to mode I cyclic loading. The study presents finite elements based computational procedures for both two and three dimensional problems to examine fatigue crack growth in functionally graded materials. Developed methods allow the computation of crack length and generation of crack front profile for a graded medium subjected to fluctuating stresses. The results presented for an elliptical crack embedded in a functionally graded medium, illustrate the competing effects of ellipse aspect ratio and material property gradation on the fatigue crack growth behavior.

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