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Journal of Materials Science

, Volume 29, Issue 4, pp 1004–1010 | Cite as

Non-destructive evaluation of the micromechanism of the deformation process during tensile tests on polymers by the elastic-wave transfer function method

  • H. Kawabe
  • Y. Natsume
  • Y. Higo
  • S. Nunomura
Papers

Abstract

The elastic-wave transfer function method (ETFuM) was applied to make clear the micromechanism of the deformation process during dynamic tensile testing of polymethylmethacrylate (PMMA) and polycarbonate (PC). In PC, the transfer function began to change at a high frequency. After that, it decreased abruptly in the low-frequency region. The variation of the transfer function at high frequency was caused by the nucleation and growth of microdefects such as crazes and microcracks. The variation at low frequency was caused by plastic deformation such as inclined necking and microdefects due to shear stress. On the other hand, in PMMA the transfer function changed homogeneously with elongation at high frequencies and did not change at low frequencies. The variation of the transfer function during tensile testing related to the micromechanism of elastic and plastic deformation processes in both PC and PMMA. The results suggested that the ETFuM is a useful and powerful method for evaluating the micromechanism of deformation processes in polymers in a non-destructive and dynamic way.

Keywords

Polymer Shear Stress Plastic Deformation Transfer Function Tensile Testing 
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.

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References

  1. 1.
    I. Narisawa, “Materials Strength in Plastics” (in Japanese) (Ohm Press, Tokyo, 1982) 163.Google Scholar
  2. 2.
    Y. Higo and S. Nunomura, in Proceedings of 2nd Symposium on Non-destructive Evaluation in New Materials and Products, Tokyo (1988) 131.Google Scholar
  3. 3.
    Y. Hushimi and A. Wada, Rev. Sci. Instrum. 47(2) (1976) 213.CrossRefGoogle Scholar
  4. 4.
    H. Kawabe and Y. Higo, J. Mater. Sci. 27 (1992) 5547.CrossRefGoogle Scholar
  5. 5.
    Idem, in “Nondestructive Characterization of Material V, Tokyo (1992) 745.Google Scholar
  6. 6.
    Idem., J. Mater. Sci. in press.Google Scholar
  7. 7.
    W. P. Manson, J. Acoust. Soc. Amer. 19 (1947) 464.CrossRefGoogle Scholar
  8. 8.
    M. Kikuchi, Phys. Earth & Plan. Inter. 25 (1981) 159.CrossRefGoogle Scholar
  9. 9.
    Idem, ibid. 27 (1981) 100.CrossRefGoogle Scholar
  10. 10.
    Y. Higo and M. Ono, in “Progress in A.E.”, Vol. 3 (Japan Society of Non-Destructive Inspection, Tokyo, 1986) p. 685.Google Scholar
  11. 11.
    “Ultrasonic Technology Manual” (in Japanese) (Nikkan Kogyo Shimbun Ltd., Tokyo, 1978).Google Scholar

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • H. Kawabe
    • 1
  • Y. Natsume
    • 1
  • Y. Higo
    • 2
  • S. Nunomura
    • 2
  1. 1.Nippondenso Co. LtdKariyaJapan
  2. 2.Precision and Intelligence LaboratoryTokyo Institute of TechnologyYokohamaJapan

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