Fatigue Life Prediction For A Cracked Notched
Element Under Symmetric Load Condition
Author(s)
M.E. Biancolini, C. Brutti, G. Cappellini & M. D'Ulisse
Abstract
In this paper the crack growth emerging from a notch is studied for round bar
under symmetric load condition.
Modifying and synthesising some models found in literature, a method for
fatigue life prediction is outlined and verified. The model takes into account the
elastic-plastic crack growth and the change of crack shape during propagation.
Overall life is divided in two parts: first a surface emerging crack propagates in
the 3 D stressed region, then a Paris law stable propagation is assumed.
A detailed 3D FEM model was developed in order to evaluate SIF vs. crack
length, an elliptical crack shape was assumed imposing the proper eccentricity
growth. The same FEM model was then exploited to evaluate the extension of
plastic zone at notch tip.
Fatigue life
Keywords
Related Book
Other papers in this volume
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