Fatigue Design of Leaf Springs for New Generation Trucks

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. Investigatio...

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Bibliographic Details
Published inIOP conference series. Materials Science and Engineering Vol. 161; no. 1; pp. 12065 - 12074
Main Authors Giannakis, E, Malikoutsakis, M, Savaidis, G
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.11.2016
Subjects
Fatigue life assessment
Heat treatment
Heavy duty trucks
High strength steels
Leaf springs
Manufacturing
Mathematical analysis
Mechanical properties
Surface properties
Surface treatment
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Summary: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.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/161/1/012065