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http://dx.doi.org/10.21289/KSIC.2022.25.6.1047

Damage Analysis of Leaf Spring for Transport Utility Vehicles  

Kim, Tae-Song (Dept. of Materials Science and Engineering, Pukyong National University)
Kang, Seok-Hee (Dept. of Materials Science and Engineering, Pukyong National University)
Kwon, Yung-Kug (Dept. of Materials Science and Engineering, Pukyong National University)
Yun, Seo-Hyun (Dept. of Die Mold System, Changwon Campus of Korea Polytechinics)
Nam, Ki-Woo (Dept. of Materials Science and Engineering, Pukyong National University)
Publication Information
Journal of the Korean Society of Industry Convergence / v.25, no.6_2, 2022 , pp. 1047-1053 More about this Journal
Abstract
The leaf spring for a truck absorbs shocks or vibrations from the road surface while driving with the elastic force of the material and prevents the shock from being transmitted to the vehicle body. It is subjected to cyclic stress, and fatigue fracture occurs frequently. This study analyzes fractured leaf spring from a 25 ton truck that has been operating for about a year. In the fractured portion, which is the origin of crack, inclusions were observed, and fatigue failure was caused by cyclic stress. In the stress calculation and FE analysis, the stress at the center of the leaf spring was obtained to be 54~65% of the yield strength of the base material and damaged material. It is most important to prevent the mixing of impurities in the steel manufacturing for leaf springs. The large stress portion of the leaf spring needs to introduce compressive residual stress by peening etc.
Keywords
Damage Analysis; Fatigue Fracture; Inclusions; Leaf Spring;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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