Article ID Journal Published Year Pages File Type
777939 International Journal of Fatigue 2008 7 Pages PDF
Abstract

The influence of Poisson’s ratio (ν) on the thickness-dependent stress concentration factor (SCF) along the root of elliptic holes in elastic plates subjected to tension is systematically investigated by use of three-dimensional finite element method. It is found that the thickness-dependent maximum of SCF, (Kt)max, increases significantly with increasing ν. As the thickness to root radius ratio B/ρ grows from 0.1 to 1000, the (Kt)max undergo a peak value, which can be increased 9% for a circular hole and 23% for an elliptic hole with length of short to long axial aspect ratio t = 0.1 when ν increases from 0.1 to 0.49. It is also found that the peak value occurs in a narrow range of the thickness to elliptic short axis ratio B/b (2–3) with different t and ν. When B/ρ is high enough, an increase of ν from 0.1 to 0.49 leads to decreasing in the SCFs on the free surface (Kt)surf about 24% and 61% and increasing in the ratio of (Kt)max/(Kt)surf about 38% and 195% for circular hole and elliptic hole with t = 0.1. The ν-dependent empirical formulae of the relationships among (Kt)max, (Kt)surf and the corresponding planar solution (Kt)p−σ have been obtained by fitting the numerical results with satisfied accuracy, which will be useful for strength and fatigue designs of engineering structures with notches and holes.

Related Topics
Physical Sciences and Engineering Engineering Mechanical Engineering
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