Influence of water saturation on fracture toughness in woven natural fiber reinforced composites

  • Kim, Hyo-Jin (Department of Mechanical Engineering, Doshisha University) ;
  • Seo, Do-Won (Fracture and Reliability Research Institute, Tohoku University)
  • 발행 : 2007.06.01

초록

Woven sisal textile fiber reinforced composites were used to evaluate fracture toughness, tensile and three-point bending. The water absorption testing of all specimens was repeated five times in this study. All specimens were immersed in pure water during 9 days at room temperature, and dried in 1 day at $50^{\circ}C$. Two kinds of polymer matrices such as epoxy and vinyl-ester were used. Fractured surfaces were taken to study the failure mechanism and fiber/matrix interfacial adhesion. It is shown that it can be enhanced to improve their mechanical performance to reveal the relationship between fracture toughness and water absorption fatigue according to different polymer matrices. Water uptake of the epoxy composites was found to increase with cycle times. Mechanical properties are dramatically affected by the water absorption cycles. Water-absorbed samples showed poor mechanical properties, such as lower values of maximum strength and extreme elongation. The $K_{IC}$ values demonstrated a decrease in inclination with increasing cyclic times of wetting and drying for the epoxy and vinyl-ester.

키워드

참고문헌

  1. A. K. Mohanty, M. Misra and L. T. Drzal, Sustainable bio-composites from renewable resources: opportunities and challenges in the green materials world, J. Polym. Environ. 10, 19-26 (2002) https://doi.org/10.1023/A:1021013921916
  2. Y. Li, Y. W. Mai and L. Ye, Sisal fibre and its composites: a review of recent developments, Compos. Sci. Technol. 60, 2037-2055 (2000) https://doi.org/10.1016/S0266-3538(00)00101-9
  3. H. J. Savastano, V. Agopyan, A. M. Nolasco and L. Pimentel, Plant fibre reinforced cement components for roofing, Constr. Build. Mater. 13, 433-438 (1999) https://doi.org/10.1016/S0950-0618(99)00046-X
  4. M. A. Dweib, B. Hu, A. O'Donnell, H. W. Shenton and R. P. Wool, All natural composite sandwich beams for structural applications, Compos. Struct. 63, 147-157 (2004) https://doi.org/10.1016/S0263-8223(03)00143-0
  5. J. Prabakar and R. S. Sridhar, Effect of random inclusion of sisal fibre on strength behaviour of soil, Constr. Build. Mater. 16, 123-131 (2002) https://doi.org/10.1016/S0950-0618(02)00008-9
  6. G. Kalaprasad, P. Pradeep, G. Mathew, C. Pavithran and S. Thomas, Thermal conductivity and thermal diffusivity analyses of low-density polyethylene composites reinforced with sisal, glass and intimately mixed sisal/glass fibres, Compos. Sci. Technol. 60, 2967-2977 (2000) https://doi.org/10.1016/S0266-3538(00)00162-7
  7. P. V. Joseph, K. Joseph and S. Thomas, Effect of processing variables on the mechanical properties of sisal-fiber-reinforced polypropylene composites, Compos. Sci. Technol. 59, 1625-1640 (1999) https://doi.org/10.1016/S0266-3538(99)00024-X
  8. E. T. N. Bisanda, The effect of alkali treatment on the adhesion characteristics of sisal fibres, Appl. Compos. Mater. 7, 331-339 (2000) https://doi.org/10.1023/A:1026586023129
  9. M. Z. Rong, M. Q. Zhang, Y. Liu, G. C. Yang and H. M. Zeng, The effect of fiber treatment on the mechanical properties of unidirectional sisal-reinforced epoxy composites, Compos. Sci. Technol. 61, 1437-1447 (2001) https://doi.org/10.1016/S0266-3538(01)00046-X
  10. X. Lu, M. Q. Zhang, M. Z. Rong, D. L. Yue and G. C. Yang, Environmental degradability of self-reinforced composites made from sisal, Compos. Sci. Technol. 64, 1301 (2004) https://doi.org/10.1016/j.compscitech.2003.10.013
  11. J. Gassan and A. K. Bledzki, Effect of moisture content on the properties of silanized jute-epoxy composites, Polym. Compos. 18, 179-184 (1997) https://doi.org/10.1002/pc.10272
  12. K. Joseph, S. Thomas and C. Pavithran, Effect of ageing on the physical and mechanical properties of sisal-fiber-reinforced polyethylene composites, Compos. Sci. Technol. 53, 99-110 (1995) https://doi.org/10.1016/0266-3538(94)00074-3
  13. A. Espert, F. Vilaplana and S. Karlsson, Comparison of water absorption in natural cellulosic fibres from wood and one-year crops in polypropylene composites and its influence on their mechanical properties, Composites Part A 35, 1267-1276 (2004) https://doi.org/10.1016/j.compositesa.2004.04.004
  14. Q. Lin, X. Zhou and G. Dai, Effect of hydrothermal environment on moisture absorption and mechanical properties of wood flour-filled polypropylene composites, J. Appl. Polym. Sci. 85, 2824-2832 (2002) https://doi.org/10.1002/app.10844
  15. S. Barsberg and L. G. Thygesen, Nonequilibrium phenomena influencing the wetting behavior of plant fibers, J. Coll. Interf. Sci. 234, 59-67 (2001) https://doi.org/10.1006/jcis.2000.7216
  16. P. V. Joseph, M. S. Rabello, L. H. C. Mattoso, K. Joseph and S. Thomas, Environmental effects on the degradation behaviour of sisal fibre reinforced polypropylene composites, Compos. Sci. Technol. 62, 1357-1372 (2002) https://doi.org/10.1016/S0266-3538(02)00080-5
  17. Y. Li, The investigation of fracture properties of sisal textile reinforced polymers, Acta Mech. Solida. Sin. 17, 95-103 (2004)
  18. S. L. Bai, R. K. Y. Li, L. C. M. Wu, H. M. Zeng and Y. W. Mai, Tensile failure mechanisms of sisal fibers in composites, J. Mater. Sci. Lett. 17, 1805-1807 (1998) https://doi.org/10.1023/A:1006661704908