A compatible method to summarise the Low- and High-Cycle fatigue test results of ductile irons and structural steels

In this paper the low and high cycle fatigue behaviour of ten structural materials is analysed in terms of strain-life, stress-life and cyclic stress-strain curves. Push-pull, strain-controlled fatigue tests are performed and then the experimental data are processed according to the Standards in force as well as following a recent procedure proposed by the authors which ensures the compatibility conditions are satisfied. As a result, a three dimensional representation of the experimental data in a stress-strain-life diagram can be drawn. The stress-life, strain-life and cyclic stress-strain curves are the projection of a unique three-dimensional curve onto the co-ordinate planes.