Laser shock processing of three categories of 7050-T7451 aluminum alloy samples was carried out

and their seven groups of fatigue life values were studied.To obtain the values of fatigue safe life of 7050-T7451 aluminum alloy specimens

the unilateral tolerance factor statistical analysis method and two-dimensional Weibull distribution method were used to predict the values of fatigue safe life

respectively

and these two kinds of calculation results were compared.The results show that:the fatigue life of aluminum alloy samples is enhanced greatly by laser shock processing

and in consideration of the confidence and reliability

the unilateral tolerance factor method can get an exact estimation value of the fatigue safe life

while the two-dimensional Weibull distribution method can get the range of values of fatigue safe life;considering different requirements of capital and safety

etc

on the fatigue safe life

the two-dimensional Weibull distribution method is more suitable for engineering applications.