Stress concentration of an elastic strip with circular holes under tension. Stress mitigations by additional holes.

Abstract

This paper deals with the stress concentration problem of an elastic strip with a central hole and two supplemental holes under tension. An investigation is made for the stress mitigations due to the interference effects of stress concentrations by the addition of supplemental holes. The influences of the distances between the central and supplemental holes and the radii of the holes on the stress mitigations are shown. A principle of the method of solution is to distribute body forces in the interior of a strip with no hole and to determine the intensities of the body forces distributed so as to satisfy the boundary conditions at the holes. For this purpose, we apply Green's functions for body force problems of a strip. The method of solution may be regarded as a kind of so-called indirect boundary element method with a fictitious boundary, or of so called charge simulation method.