Multiaxial fatigue endurance of 30NCD16 steel
1989
Abstract Various criteria used to choose specimen dimensions under multiaxial fatigue have been proposed but their validity is not proven because not enough tests have been carried out in this field. A machine for carrying out fatigue tests under simple, radial and complex loads has therefore been designed. This prototype enables a specimen to be subjected to the loadings experienced by a propeller shaft: a combination of asymmetrical bending (plane or rotative bending) and torsion with various values. The results obtained for an aeronautical steel (30NCD16 steel) enable examination of the validity of the three accepted criteria for this study and the proposal of two methods of sizing (the former theoretical, the latter empirical) which better reflect the experimental results.
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