가설환경에 따른 조가선의 피로수명 특성

Fatigue Life Properties of Messenger Wire with Service Environments

  • 발행 : 2003.03.01

초록

Environment-dependent fatigue life of Cu-Cd alloy wires used as messenger wires was investigated. Tensile test results showed the decrease of tensile strength and elongation of messenger wires by 3.7% and 16.8%, respectively, in used specimens when compared to new ones. Messenger wires used at industrial region for 26 yeras showed 35∼50% decrease in fatigue life, which is partly due to the in stress concentrations by formation of corrosion products at the surface. Single wires showed better fatigue properties than stranded wires, especially at low cycle regions with higher stresses. Stranded wires showed shorter fatigue lives than single wires because of friction between wires by surface contact. Service life of messenger wires was dependent upon the environments which they were exposed to. SO$_2$ and humidity deteriorated the fatigue properties by environmental degradation.

키워드

참고문헌

  1. 전철구조물의 수명예측기법에 관한 연구, 한국철도 기술연구원 연구보고서, 2000
  2. 한국철도기술연구원, 철도환경기술개발-전차선로가선재의 환경부식열화에 의한 피로특성 평가, 2002
  3. 정재기, 김성득, 심재명, 양해원 : 강심 알루미늄연선의 가공지선에 대한 부식검출과 수명예측, 전기학회논문지,45(7), pp. 1039-1044, 1996
  4. 大氣汚染と 金屬の 潔食, 大氣汚染ち 材料, 金屬, 5, pp.33~37,1994
  5. J. Tidblad and Leygraf, Atmospheric corrosion Effects of S02 AND 03 on Laboratory-Exposed Copper, J. Electrochem. SOC., Vol. 142, No. 3, March 1995
  6. J.A. Bannantine, Jess J. Comer and James L Handrock, Fundamentals of Metal Fatieue Analysis, Prentice-Hall Inc, New Jersy, pp. 83--114, 1990
  7. 이창순, 박인규, 김용기, 장세기, Cu-Cd 합금선의 사용환경에 따른 피로 수명평가, PROC. OF 16th Conference on Mechanical Behaviors of Metals, pp. 291-300, November 2002