Journal of Materials Science

, Volume 29, Issue 18, pp 4736–4741 | Cite as

Effect of moisture absorption on damping performance and dynamic stiffness of NY-6/CF commingled yarn composite

  • A. Djumaev
  • K. Takahashi


The damping performance of a unidirectional (0 °) nylon 6-carbon fibre (NY-6/CF) commingled yarn composite was experimentally studied with special concern for the effect of moisture absorption. Dried specimens were immersed in distilled water for a certain time to allow water to diffuse into the material. The damping measurements were conducted on double-cantilever and cantilever beam specimens using sinusoidal and impact-hammering techniques. The damping loss factor η, flexural dynamic stiffness E′ and loss modulus E″ were evaluated as a function of the moisture content up to 8.2 wt %. η and E″ initially increased significantly with increasing moisture content up to 5–6%. Further increase of the moisture content up to 8.2% caused a slight reduction in damping ability. The reverse was true of E′ although the variation amplitude was smaller. The moisture content dependency of the damping performance obtained is discussed.


Polymer Nylon Cantilever Beam Loss Factor Slight Reduction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    A. B. Shultz and S. W. Tsai, J. Compos. Mater. 2 (1968) 368.CrossRefGoogle Scholar
  2. 2.
    R. D. Adams and D. G. Bacon, ibid. 7 (1973) 402.CrossRefGoogle Scholar
  3. 3.
    R. F. Gibson, S. K. Chaturvedi and C. T. Sun, J. Mater. Sci. 17 (1982) 3499.CrossRefGoogle Scholar
  4. 4.
    C. T. Sun, R. F. Gibson and S. K. Chaturvedi, ibid. 20 (1985) 2575.CrossRefGoogle Scholar
  5. 5.
    S. A. Suarez, R. F. Gibson, C. T. Sun and S. K. Chaturvedi, Exper. Mech. 2 (26) (1986) 175.CrossRefGoogle Scholar
  6. 6.
    R. M. Grane and J. W. Gillespie, Compos. Sci. Technol. 40 (1991) 355.CrossRefGoogle Scholar
  7. 7.
    T. A. Willway and R. G. White, ibid. 36 (1989) 77.CrossRefGoogle Scholar
  8. 8.
    S. A. Suarez, R. F. Gibson and L. R. Deobald, Exp. Tech. 8 (10) (1984) 19.CrossRefGoogle Scholar
  9. 9.
    T. Matsuo and T. Hokudoh, in Proceedings of 2nd Japan International SAMPE Symposium (SAMPE, Tokyo, Japan, 1991) p. 959.Google Scholar
  10. 10.
    L. E. Nielsen, “Mechanical Properties of Polymers and Composites” Vol. 1 (Dekker, New York, 1974) p. 49.Google Scholar
  11. 11.
    R. E. Allred, J. Compos. Mater. 15 (1981) 100.CrossRefGoogle Scholar
  12. 12.
    K. A. Ramsey, Sound & Vibration 10 (4) (1976) 18.Google Scholar
  13. 13.
    W. G. Halvorsen and D. L. Brown, ibid. 11 (11) (1977) 8.Google Scholar

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • A. Djumaev
    • 1
  • K. Takahashi
    • 1
  1. 1.Research Institute for Applied MechanicsKyushu UniversityFukuokaJapan

Personalised recommendations