Experimental Investigation on Fatigue Life of Cord-Rubber Composites


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Kapucu O. A. , Kasım H., Can Y., Yazıcı M.

European Journal of Science and Technology, vol.1, no.1, pp.16-21, 2018 (Refereed Journals of Other Institutions)

  • Publication Type: Article / Article
  • Volume: 1 Issue: 1
  • Publication Date: 2018
  • Title of Journal : European Journal of Science and Technology
  • Page Numbers: pp.16-21

Abstract

Air springs are used in automobile suspensions and perform under highly dynamic loading conditions. An essential component of an air spring mechanism is the rubber tube. The rubber tube produced from layered cord rubber composites. It is constructed as two-layer cord fabric reinforced rubber composites. The matrix crack, debonding and failure of the cord are the most observed damage modes of cord-rubber composites. The presented study investigated fatigue life behavior and damage mechanisms of the PA 6.6 Cord fabric/Natural rubber composites. Curing conditions of rubber such as pressure (7.5,12.5, 15 MPa), temperature (140,160 and 180 °C) and time (5,8 and 10 min) were taken as research parameters. Moreover, two type of PA 6.6 cord fiber and three different fiber orientation angle (40,42 and 45°) were studied as material parameters. All experiments performed by using De-Mattia cyclic fatigue test equipment under 5 Hz frequency. The experimental study designed by Taguchi method using L18 orthogonal series. The results show that 12.5 to 15 MPa curing pressure, 8-10 min curing time and 160 °C are optimum values for cord rubber layered composites to obtain high fatigue life. The fiber type of the cord fabric and fiber orientation angle between 40 to 45° does not affect the fatigue life of the cord-rubber composites. The post-mortem analysis performed to clarify damage mechanisms