ABSTRACT
The fatigue of metal of flight vehicle is an important issue in flight security. So the relationship between fatigue life of metal, ceramic or composite materials and applied stress is one of main concern for the design-for-reliability process. Fatigue data on ferrous and titanium alloys show that experimental results tested below a particular stress level are unlikely to fail, however, most non-ferrous metals such as aluminum, copper and magnesium seem not to have such fatigue limit.
