Abstract
In this paper, the tension problem of a cylinder with spheroidal cavity is analyzed by the use of the indirect fictitious-boundary integral method in the linear couple-stress theory. The stress concentration factors and the stress distributions on a net section are obtained for various values of parameters, such as the characteristic length l, the diameter of a cylinder and the flatness ratio of a cavity. The results of the infinite problem with a spherical cavity are comparerd with the others. From the results, it is shown that, with increasing l, the axial stress concentration factor decreases monotonously, however, the hoop stress concentration factor decreases in the case of large stress gradient but increases in the case of small one.
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