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    Volume 49, Issue 4 (July 2021)

    Special Issue Paper

    Fatigue Performance Analysis of GRE Composite Pipes by Conducting Tension-Tension Tests on the Rings Cut from the Pipe

    (Received 23 December 2018; accepted 18 June 2019)

    Published Online: 2021

    CODEN: JTEVAB

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    Abstract

    The main purpose of this study is to analyze the fatigue behavior of an industrial (±55°)9 filament-wound glass reinforced epoxy pipe. Fatigue tests are conducted in accordance with ASTM D2992, Standard Practice for Obtaining Hydrostatic or Pressure Design Basis for Fiberglass (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Fittings, but instead of the entire pipe, rings cut from the pipe are used in the tests. This standard proposes a frequency of 0.42 Hz and stress ratio of R = 0.05. Tension-tension fatigue tests are performed on the rings at different load levels from 60 to 90 % of the ultimate hoop strength of the pipe. After the tests, the maximum pressure and maximum hoop stress curves versus the number of cycles to fatigue failure are presented. A comprehensive discussion about the importance of substituting the ring test method with ASTM D2992 standard test methods to determine the long-term performance of the composite pipes in the future is presented. The microscopic fatigue failure mechanisms of the rings are also characterized and interpreted using a scanning electron microscope.

    Author Information:

    Mahdavi, Hamidreza
    Faculty of Mechanical Engineering, Tarbiat Modares University, Jalal AleAhmad, Tehran,

    Rahimi, Gholam Hossein
    Faculty of Mechanical Engineering, Tarbiat Modares University, Jalal AleAhmad, Tehran,

    Farrokhabadi, Amin
    Faculty of Mechanical Engineering, Tarbiat Modares University, Jalal AleAhmad, Tehran,


    Stock #: JTE20180948

    ISSN:0090-3973

    DOI: 10.1520/JTE20180948

    Author
    Title Fatigue Performance Analysis of GRE Composite Pipes by Conducting Tension-Tension Tests on the Rings Cut from the Pipe
    Symposium ,
    Committee F17