Abstract
The body force method is applied to calculate stress concentration factors of partially-circular circumferential notched cylindrical specimens subjected to torsion, tension of bending. This type specimen is used frequently for fatigue tests. The stress field induced by a ring force in an infinite body is used to solve these problems. The fundamental solutions and calculation method developed here have a wide applicability for various kinds of axisymmetric notch problems under torsion, tension or bending. Through the comparison of the present result with Neuber's analytical solution for a deep hyperbolic notch, the Neuber's solution is found to give a sufficient accuracy for a blunt notch in engineering use.
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