The Fatigue Life Prediction of Pistons Based on the Cumulate Damage
In this study, the FEA static and dynamic analysis for one type of piston are carried out by using software ANSYS to obtained the cranny origin position and stress range value of the dangerous part of the piston, respectively. The critical crack length is analyzed based on the fatigue theory; the stress intensity factors (SIF) are computed, and the expression of the shape geometry factor of the piston is obtained according to the least squares method. An estimated formula of the fatigue life is developed by amending the Paris formula on the basis of studying the fatigue behavior of pistons. Finally, the fatigue cracked life of the piston is calculated using these parameters and the Amending Paris formula.
Zhengyi Jiang and Chunliang Zhang
Y. X. Wang et al., "The Fatigue Life Prediction of Pistons Based on the Cumulate Damage", Advanced Materials Research, Vols. 97-101, pp. 2654-2657, 2010