Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 31, Issue 4, Pages 759-765Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2008.03.006
Keywords
Round bar; Sickle-shaped surface crack; Stress-intensity factor (SIF); Eccentric axial loading; Fatigue
Funding
- Italian Ministry for University and Technological and Scientific Research (MIUR)
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In the present paper, the fatigue propagation of an initial sickle-shaped surface crack in a metallic round bar under eccentric axial loading acting perpendicular to the crack plane is examined. Firstly, the stress-intensity factor (SIF) along the crack front is determined through a three-dimensional finite element analysis and the one-quarter point displacement method, for different values of the loading eccentricity. Then, the fatigue behaviour of the cracked bar is numerically analysed by a step-by-step procedure based on the Paris-Erdogan law. The results are plotted in terms of crack paths, intersection angle and crack depth evolution, by varying the loading eccentricity. (C) 2008 Elsevier Ltd. All rights reserved.
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