Measurements of Residual Stress in Carbon Fibre Composite Materials Using X-Ray Diffraction

  • Ruth H. Fenn
  • Adrian M. Jones

Abstract

The presence of thermal residual stresses in cured carbon fibre composites is well known and can lead to mechanical failure. A non-destructive X-ray diffraction technique which allows the six components of the threedimensional strain tensor to be determined was used to investigate carbon fibre composite materials. Measurements were made on unidirectional composites containing small metal particles as a filler, because neither the carbon fibres nor the resin matrix give suitable high angle Bragg reflexions. Significant shear strains were measured in addition to principal compressive strains. Ancillary experiments were performed on particles in resin only and whilst applying strain to the composite parallel to the ’fibres. The latter enables the strain in the metal particles to be related to that in the bulk composite.

Keywords

Carbon Fibre Nickel Particle Thermal Residual Stress Nickel Powder Carbon Fibre Composite 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Dorey, G., J. Phys. D: Appl. Phys., 1987, 20, 245–56.CrossRefGoogle Scholar
  2. 2.
    Barrett, C.S. and Predecki, P., Polymer Composites, 1980, 1, 2–6.CrossRefGoogle Scholar
  3. 3.
    Fenn, R.H., Jones, A.M. and Wells, G.M., AERE Report R12901, Harwell Laboratory, Oxfordshire, UK, 1988.Google Scholar
  4. 4.
    Dolle, H., J. Appl. Cryst., 1979, 12, 489–501.CrossRefGoogle Scholar
  5. 5.
    French, D.N., J. Am. Ceram. Soc., 1969, 52, 271–5.CrossRefGoogle Scholar
  6. 6.
    Fenn, R.H. and Jones, A.M., J. Appl. Cryst., 1988, 21, 38–40.CrossRefGoogle Scholar
  7. 7.
    Predecki, P. and Barrett, C.S., Proc. 28th Sagamore Army Mat. Res. Conf., Plenum Publishers, 1982, 409-424.Google Scholar
  8. 8.
    Favre, J.P., Composites Design for Space Applications, ESA SP-243, 1986, 31.Google Scholar
  9. 9.
    Tsai, S.W. and Hahn, H.T., Composite Materials Workbook, AFML-TR-78-33, 1978, 65.Google Scholar

Copyright information

© United Kingdom Atomic Energy Authority 1989

Authors and Affiliations

  • Ruth H. Fenn
    • 1
  • Adrian M. Jones
    • 1
  1. 1.Materials Development DivisionHarwell LaboratoryOxfordshireUK

Personalised recommendations