On design of fatigue resistance metallic parts

This paper is devoted to design of metallic parts exposed to low cycle fatigue. Two flat discs, as representatives of these parts, were discussed. The first with 8, and the second with 64 eccentrically arranged holes. Their resistance to low cycle fatigue was investigated. Cyclic properties of two aerospace steels nominated for workmanship, plus planned revolves per minute and revolves per minute of 5% above planned, are taken into account. On the base of estimated low cycle fatigue life data, good design solution was discovered. On the other hand, it was shown that the both mentioned discs would have a large drop of resistance to low cycle fatigue for revolves per minute of 5% above planned