Room-temperature and frozen-stress photoelastic tests have been carried out to determine the magnitude, position, and extent of the stress concentrations which occur in the blending radii at the junctions of sections of different widths in symmetrical plates subjected to direct loads.
An empirical equation has been derived from the flat-plate tests which is also applicable to shafts in tension.
Other published data are consisent with the predictions of the empirical equations.
Stress concentration factors for shafts in torsion are lower than in tension.
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