Estimation of fatigue safe lives of 7050-T7451 aluminum alloy samples

作者：Ren Xu Dong^*; Jiang Da Wei; Zhang Yong Kang; Zhang Tian; Luo Xin Min

来源：Journal of Aerospace Power, 2011, 26(1): 185-190.

• 7050-T7451 aluminum alloy
• Laser shock processing
• Safe life
• Unilateral tolerance factor method
• Weibull

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.

• 出版日期2011