Approximate Prediction Of Mixed-mode
Fatigue Crack Growth
Author(s)
D.G. Pavlou
Abstract
As the direction of the mixed-mode fatigue crack growth may not be known in
advance the T-fracture criterion is proposed to simulate the fatigue crack
trajectories under general in-plane fatigue loading. The dilatational component
of the strain energy density is found to be a suitable parameter for predicting
the mixed-mode fatigue crack growth path, as well as the fatigue crack growth
rate. Using the proposed concept for the predictions, only mode-I fatigue test
data are required. The derived fatigue crack growth rate relationship takes into
account both stress amplitude and mean stress effects, as well as the crack
geometry and material properties.
1 Introduction
Modern design considerations based on damage tolerance philosophy often
require prediction of fatigue crack growth under biaxial loading. However,
most of
Keywords
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