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http://dx.doi.org/10.5574/KSOE.2011.25.6.080

UNSM Surface Technology for Manufacturing and Remanufacturing Torsion Bars for Crawler Vehicles  

Suh, Chang-Min (School of Mechanical Engineering, Kyungpook National University)
Pyoun, Young-Sik (School of Mechanical Engineering, SunMoon University)
Cho, In-Ho (Design Mecha Co., Ltd.)
Baek, Un-Bong (Korea Research Institute of Standards & Science)
Publication Information
Journal of Ocean Engineering and Technology / v.25, no.6, 2011 , pp. 80-85 More about this Journal
Abstract
The Ultrasonic Nanocrystal Surface Modification (UNSM) technology improves the fatigue life of a torsion bar by inducing compressive residual stress on the surface layer. The UNSM is applied to replace the presetting method and shot peening technology. The torsion bar must be changed periodically because of a lack of durability and a phenomenon related to the stress relaxation. The torsion fatigue test specimens were made of DIN17221 material, and the results showed that the fatigue life was 5 times more than under durability test conditions. A comparison test between the commercial vehicles' presetting method and shot peened torsion bar and the UNSM torsion bar showed that the UNSM could replace the presetting method and shot peening.
Keywords
Torsion bar; Remanufacturing; Ultrasonic nanocrystal surface modification UNSM; Presetting; Shot peening SP; Stress relaxation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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