Fatigue damage in light alloys under block loading, with stress concentration and fretting corrosion

The investigation was performed into the laws of high-cycle fatigue of aluminum and titanium alloys under regular and block loading in the presence of stress concentration and fretting-corrosion. It is shown that in accordance with the linear damage summation hypothesis the magnitudes of relative accumulated damage under block loading with stress concentration and fretting-corrosion are equal to or exceed those for smooth specimens, which is defined by the degree of the influence of the processes initiated on the block high step upon those of fatigue damage accumulation on the block low step.