Abstract
This paper deals with the stress concentration problem of a circular solid cylinder with a central notch and two supplemental notches under torsion. Stress mitigations due to interference effects of stress concentrations are investigated. The influences of the distances between a central notch and two supplemental notches and the radius of the semicircular notches on the mitigations of stress concentration are considered. The principle of the method of solution used here is to distribute torsional body forces in the interior of a solid cylinder so as to satisfy boundary conditions of the notched surfaces imagined in the solid cylinder with no notch. For this purpose, we apply Green's functions for torsional body force problems of an infinite solid cylinder. Numerical results are shown for stress concentration factors of the problem.
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