Composite Materials and Engineering

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A comparison of destructive behaviors of distilled water, salty water, sulfuric acid and heat on glass/vinyl ester composites

  • Asli, S.A. (Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology) ;
  • Shokrieh, M.M. (Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology) ;
  • Kamangar, M.A. (Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology)
  • Received : 2020.07.31
  • Accepted : 2021.07.26
  • Published : 2021.08.25
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Abstract

In the present paper, the destructive behavior of distilled water, salty water, sulfuric acid, and heat on glass/vinyl ester composites was investigated by experimental methods. Hetron 922 vinyl ester resin and two types of mat and woven glass fibers as the reinforcements were used to fabricate composite test samples. All samples were immersed in distilled water, salty water, and sulfuric acid with three different concentrations. The tests were performed at 20℃ and 70℃ for the exposure duration of 1, 2, 4, and 8 weeks. Bending tests were performed after aging for all composite samples to check the degradation of the bending modulus and strength. The results show that the effect of distilled water, in comparison with salty water, on the degradation of composite samples was significant. On the other hand, almost non-sensitivity of concentrations of salty water on the weight gain of specimens has been observed. In addition, it was also observed that the degradation of samples at 70℃ temperature is much more than that of at 20℃. Also, it was observed that the flexural modulus of virgin specimens exposed to salty water (2% concentration) has been recovered just after two weeks of immersion. Furthermore, in some cases, composite samples under the sulfuric acid solution have lost almost 80% of their mechanical properties.

Keywords

Acknowledgement

This research was supported by Iran National Science Foundation, Grant No. 97024007.

References

  1. Abd El-Baky, M.A. (2018), "Experimental investigation on impact performance of glass-polypropylene hybrid composites: Effect of water aging", J. Thermoplast. Compos. Mater., 32(10), 657-672. https://doi.org/10.1177/0892705718772876.
  2. Aktas, A. and I. Uzun (2008), "Sea water effect on pinned-joint glass fibre composite materials", Compos. Struct., 85(1), 59-63. https://doi.org/10.1016/j.compstruct.2007.10.007.
  3. Amaro, A., Reis, P.V.B., Neto, M.A. and Louro, C. (2014), "Effect of different commercial oils on mechanical properties of composite materials", Compos. Struct., 118, 1-8. https://doi.org/10.1016/j.compstruct.2014.07.017.
  4. Bal, S. and Saha, S. (2015), "Effect of sea and distilled water conditioning on the overall mechanical properties of carbon nanotube epoxy composites", Int. J. Damage Mech., 26(5), 758-770. https://doi.org/10.1177/1056789515615184.
  5. Boinard, E., Pethrick. R.A., Dalzel-Job. J. and Macfarlane. C.J. (2000), "Influence of resin chemistry on water uptake and environmental ageing in glass fibre reinforced composites-polyester and vinyl ester laminates", J. Mater. Sci., 35, 1931-1937. https://doi.org/10.1023/A:1004766418966.
  6. Boisseau, A., Davies, P. and Thiebaud, F. (2012), "Sea water ageing of composites for ocean energy conversion systems: influence of glass fibre type on static behaviour", Appl. Compos. Mater., 19(3-4), 459-473. https://doi.org/10.1007/s10443-011-9219-6.
  7. Davalos, J.F., Chen, Y. and Ray, I. (2012), "Long-term durability prediction models for GFRP bars in concrete environment", J. Compos. Mater., 46(16), 1899-1914 .https://doi.org/10.1177/0021998311427777.
  8. Garrido, M.N.T. (2013), "Aging of polymeric composites; A literature review", Ph.D. Dissertation; Massachusetts Institute of Technology, Massachusetts, U.S.A.
  9. Gentry, T., Bank, L.C., Barkatt, A. and Prian, L. (1998), "Accelerated test methods to determine the long-term behavior of composite highway structures subject to environmental loading", J. Compos., Technol. Res., 20(1), 38-50. https://doi.org/10.1520/CTR10499J
  10. Heshmati, M., Haghani, R. and Al-Emrani, M. (2017), "Durability of bonded FRP-to-steel joints: Effects of moisture, de-icing salt solution, temperature and FRP type", Compos. Part B Eng., 119, 153-167. https://doi.org/10.1016/j.compositesb.2017.03.049.
  11. Imielinska, K. and L. Guillaumat (2004), "The effect of water immersion ageing on low-velocity impact behaviour of woven aramid-glass fibre/epoxy composites", Compos. Sci. Technol., 64(13), 2271-2278. https://doi.org/10.1016/j.compscitech.2004.03.002
  12. Kim, H.Y., Park, Y.H., You, Y.J. and Moon, C.K. (2008), "Short-term durability test for GFRP rods under various environmental conditions", Compos. Struct., 83(1), 37-47. https://doi.org/10.1016/j.compscitech.2004.03.002.
  13. Martin, R. (2008), Ageing of Composites, Woodhead Publishing and Maney Publishing, Cambridge, U.S.A.
  14. Miyano, Y., Nakada, M. and Sekine, N. (2004), "Accelerated testing for long-term durability of GFRP laminates for marine use", Compos. Part B Eng., 35(6), 497-502. https://doi.org/10.1016/j.compositesb.2003.11.006.
  15. Mouzakis, D.E., Zoga, H. and Galiotis, C. (2008), "Accelerated environmental ageing study of polyester/glass fiber reinforced composites (GFRPCs)", Compos. Part B Eng., 39(3), 467-475. https://doi.org/10.1016/j.compositesb.2006.10.004.
  16. Shokrieh, M.M. and Bayat, A. (2007), "Effects of ultraviolet radiation on mechanical properties of glass/polyester composites", J. Compos. Mater., 41(20), 2443-2455. https://doi.org/10.1177/0021998307075441.
  17. Tsotsis, T.K., Keller, S., Lee, K., Bardis, J. and Bish, J. (2001), "Aging of polymeric composite specimens for 5000 hours at elevated pressure and temperature", Compos. Sci. Technol., 61(1), 75-86. https://doi.org/10.1016/S0266-3538(00)00196-2.