Methodologies for developing distributional theoretical stress concentration factors, fatigue stress concentration factors, and notch sensitivity factors for circumferentially grooved, rotating AISI 4130 and AISI 1038, 3/8-in.-dia rods subjected to reversed bending are developed and the results are presented. The groove radii vary from 0.031 in. to 1.870 in., and the base diameters at the groove vary from 0.0937 in. to 0.2700 in. Two illustrative cases for designing such components to a specified life and reliability are given.

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