We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Fatigue life prediction method for contact wire using maximum local stress.
- Authors
Kim, Yongseok; Lee, Kiwon; Li, Haochuang; Seok, Chang-Sung; Koo, Jae-Mean; Kwon, Sam-Young; Cho, Yong
- Abstract
Railway contact wires supplying electricity to trains are exposed to repeated mechanical strain and stress caused by their own weight and discontinuous contact with a pantograph during train operation. Since the speed of railway transportation has increased continuously, railway industries have recently reported a number of contact wire failures caused by mechanical fatigue fractures instead of normal wear, which has been a more common failure mechanism. To secure the safety and durability of contact wires in environments with increased train speeds, a bending fatigue test on contact wire has been performed. The test equipment is too complicated to evaluate the fatigue characteristics of contact wire. Thus, the axial tension fatigue test was performed for a standard specimen, and the bending fatigue life for the contact wire structure was then predicted using the maximum local stress occurring at the top of the contact wire. Lastly, the tested bending fatigue life of the structure was compared with the fatigue life predicted by the axial tension fatigue test for verification.
- Subjects
FATIGUE life; ELECTRIC wire; STRAINS &; stresses (Mechanics); RAILROAD electric equipment; PANTOGRAPH in electric railroads
- Publication
Journal of Mechanical Science & Technology, 2015, Vol 29, Issue 1, p67
- ISSN
1738-494X
- Publication type
Article
- DOI
10.1007/s12206-014-1210-3