Abstract
1. The fatigue limit and life of notched specimens are reduced by the action of corrosive media to a lesser extent than those of smooth specimens. 2. The effects of simultaneously acting stress concentration and corrosion upon the fatigue limit and endurance of a material are not additive. 3. Over the entire stress range studied the corrosion-induced reduction in endurance is more substantial than the reduction caused by this factor in the fatigue limit. This is an important consideration in the determination of the service] life of machine parts by a method based on estimation of the accumulated damage caused by cyclic stresses over a wide service load range. 4. It is shown that in calculating the permissible service life of aircraft components exposed to the simultaneous action of stress concentration and corrosion, it is advisable to use the coefficient characterizing the combined effect of these factors upon the endurance of the given material rather than the coefficients reflecting the separate effect of each of these factors.
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