A 2014-T6 aluminium rod (3.5 cm in diameter) is subjected to a repeated tension-compression load cycling along its axis at a frequency of 100 Hz. If the part must last approximately 278 hours before failure, calculate the maximum allowable load amplitude (in N).
Cycles to failure. N 109
(a) Determine the total number of cycles during the time
(b) What is fatigue strength (i.e. S in the Figure above) in [MPa] at the cycles calculated in (a) for this aluminium alloy
(c) Calculate the maximum allowed load in [N]
