The paper presents the conditions that must be implemented in stress analysis using the finite element method when the stress concentration factors in bars of circular cross section, having longitudinal holes and subjected to torsion must be accurate obtained. There are presented parametrically the stress concentration factors of some particular cross sections. In order to reduce the calculation time and effort, some facilities given by the symmetry of the cross section and the symmetry/antisymmetry of the load were used. The results are presented graphically and can be used in the design process of such structures. More than that, the methodology depicted in this paper may be used as a model for the analysis of other type of cross sections, different from the ones presented here.
