SYMPOSIA PAPER Published: 01 January 2003

Propagation of Non-Planar Fatigue Cracks: Experimental Observations and Numerical Simulations


Two types of mixed-mode fatigue crack growth tests are described. Experimental observations of non-planar fatigue crack growth are compared with numerical predictions from the computer code, FRANC3D. In these analyses, the evolution of crack shape is not assumed a priori. The code predicts evolving fatigue crack shapes and fatigue crack growth rates based on linear-elastic mixed-mode stress intensity factor distributions along the evolving crack fronts. The simulations are shown to result in accurate crack front shape predictions, and to predict overall fatigue crack life in a reasonable and/or conservative manner.

Author Information

Riddell, WT
US DOT/Volpe National Transportation Systems Center, Cambridge, MA
Ingraffea, AR
Cornell University, Ithaca, NY
Wawrzynek, PA
Cornell Fracture Group, Ithaca, NY
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Developed by Committee: E08
Pages: 573–597
DOI: 10.1520/STP11095S
ISBN-EB: 978-0-8031-5472-8
ISBN-13: 978-0-8031-2899-6