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Lifetime prediction of woven GFRP laminates under constant tensile loading in hydrothermal environment

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Abstract

This study aims to investigate the effects of a hydrothermal environment on the creep behavior of woven glass fiber reinforced plastics (GFRPs) and to propose a method for predicting their lifetime. Toward this end, experiments were carried out in air and deionized water at 40, 60, 80 and 95 ∘C. Static tensile tests of woven GFRP were conducted in air and in deionized water to evaluate its mechanical properties and to determine suitable experimental conditions for subsequent constant tensile load tests. The mechanical properties of the woven GFRP decreased with an increase in temperature and with water immersion. Constant tensile load tests were also conducted in air and in deionized water to investigate the creep behavior and fracture time. The fracture time decreased with an increase in stress and water temperature and demonstrated the possibility of a threshold stress for fracturing. In addition, the fracture time during each constant tensile load test was predicted using a modified Reiner–Weissenberg (R-W) criterion, which is a failure criterion for linear viscoelastic materials based on the accumulation of dissolved energy within the GFRP. In this study, the R-W criterion was modified to consider the effects of degradation and its acceleration, which are due to the applied stress and immersion in a solution. The predicted results were in good agreement with the experimental data when considering the effects of hydrothermal aging.

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Acknowledgements

This work was supported by a Grant-in-Aid for Scientific Research (C) No. 20560089 and by the Mizuho Foundation for the Promotion of Sciences.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan

    Masahiro Kotani & Hiroyuki Kawada

  2. Graduate School of Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan

    Yusuke Yasufuku, Naoki Inoue & Ken Kurihara

Authors
  1. Masahiro Kotani
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  2. Yusuke Yasufuku
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  3. Naoki Inoue
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  4. Ken Kurihara
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  5. Hiroyuki Kawada
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Correspondence to Masahiro Kotani.

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Kotani, M., Yasufuku, Y., Inoue, N. et al. Lifetime prediction of woven GFRP laminates under constant tensile loading in hydrothermal environment. Mech Time-Depend Mater 17, 261–274 (2013). https://doi.org/10.1007/s11043-012-9181-1

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  • DOI: https://doi.org/10.1007/s11043-012-9181-1

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