Journal
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
Volume 32, Issue 10, Pages 847-855Publisher
WILEY
DOI: 10.1111/j.1460-2695.2009.01391.x
Keywords
fatigue; low-amplitude loads below the fatigue limit; mechanical properties; strengthening; vehicle components
Funding
- Shanghai Natural Science Foundation [07ZR14081, 09ZR1422000]
- Shanghai Municipal Education Commission [08YZ102]
- Ministry of Baden-Wurttemberg
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Changes in the mechanical properties of vehicle components were investigated after strengthening under low-amplitude loads below the fatigue limit (SLAL). The strengths of vehicle components including fatigue strength, static strength and yield strength were significantly increased by SLAL. The surface hardness of the front axle, composed of a kind of low strength steel without heat treatment, was enhanced with increased strengthening and damaging. The change of surface hardness was reversed completely for the transmission gear, composed of a kind of high strength steel with surface heat treatment. The natural frequency of the transmission gear was appreciably increased by SLAL.
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