EFFECT OF LOADING FREQUENCIES ON FATIGUE RESISTANCE OF MATERIALS

The influence of the loading frequency on the endurance limit, durability and cyclic strength of metals and alloys in the high frequency range depends on several factors: stress level, voltage change, loading method, material structure. With increasing speeds and power of engines and power-driven vehicles, the fatigue strength of parts and components is becoming increasingly important. During operation, parts are exposed to high-frequency cyclic loading, and their service life and reliable operation are determined by fatigue strength in most cases, therefore, it is necessary to conduct fatigue tests in a wide range of loading frequencies. In the general case, the frequency of application of the load ambiguously affects the material’s resistance to fatigue; therefore, different materials in different areas of fatigue failure have differences in their response to a change in the loading frequency.