期刊
METALS
卷 13, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/met13081453
关键词
notch effect; elliptically notched bar; eccentric annular external crack; finite element method; J-integral; stress intensity factor (SIF); bar bending; partial and full contact
This paper obtained stress intensity factor (SIF) solutions of eccentric annular external cracks in elliptical notched round bars under tension loading through 3D finite element analysis, and their relation to the energy release rate obtained with the J-integral contour. The variables analyzed were the ligament diameter, its eccentricity, and the elliptical notch aspect ratio. The maximum SIF increases with the ligament eccentricity, the presence of the notch (compared to when the bar is smooth), and the elliptical notch axial semi-axis (for the same notch depth); it decreases with the ligament diameter.
In this paper, stress intensity factor (SIF) solutions of eccentric annular external cracks in elliptical notched round bars under tension loading have been obtained from 3D finite element analysis, along with their relation to the energy release rate obtained with the J-integral contour. The analysis variables have been the ligament diameter, its eccentricity, and the elliptical notch aspect ratio. The maximum SIF increases with the ligament eccentricity, the presence of the notch (compared to when the bar is smooth), and the elliptical notch axial semi-axis (for the same notch depth); it decreases with the ligament diameter. For external cracks, eccentricity induces bending of the bar subjected to tensile loading, which can produce partial and full contact of the crack surface, relevant phenomena in terms of the SIF value at the different points of the crack front.
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