Fatigue Design of Leaf Springs for New Generation Trucks

20th Innovative Manufacturing Engineering and Energy Conference

机械制造;能源学

Giannakis, E.^1 ; Malikoutsakis, M.^1 ; Savaidis, G.^1

Department of Mechanical Engineering, Aristotle University of Thessaloniki, Thessaloniki

GR-54124, Greece^1

关键词: Fatigue design;    Fatigue loadings;    Heavy truck;    Manufacturing process;    Mechanical surface;    Stress peening;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/161/1/012065/pdf
DOI  :  10.1088/1757-899X/161/1/012065

来源: IOP

【 摘 要 】

Taking as example high-performance parabolic leaves made of the high-strength steel 52CrMoV4 used for the suspensión of heavy truck axles, the present paper focuses on the effect of the manufacturing process (heat treatment and stress peening) on their performance under fatigue loading. Investigations of the microstructure and the mechanical properties of the core and the surface of selected prototype specimens reveal the degradation of the mechanical surface properties due to the applied manufacturing process. The results of these investigations have been used as input for analytical fatigue life calculations and the theoretical assessment of every individual life-influencing factor (material, heat treatment, surface treatment, loading). Wohler (S-N) curves for various probabilities of survival were experimentally determined and compared to the calculated ones. The agreement between Experiment and Theory is satisfactory.