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Journal of Materials Science

, Volume 44, Issue 22, pp 6187–6198 | Cite as

The variation in lateral and longitudinal stress gauge response within an RTM 6 epoxy resin under one-dimensional shock loading

  • G. J. Appleby-ThomasEmail author
  • P. J. Hazell
  • C. Stennett
Article

Abstract

The dynamic response of a commercially important epoxy resin (RTM 6) has been studied using plate impact experiments in the impact velocity regime of 80–960 m/s. Both longitudinal and lateral manganin stress gauges were employed to study the development of orthogonal components of stress both during and after shock arrival. In light of recent work raising doubts about the interpretation of lateral gauge data, lateral response within the RTM 6 resin was also used to investigate the physical phenomena being measured by the embedded lateral gauges. USuP and σXuP Hugoniot relationships were in good agreement with data for similar polymer materials from the literature. Derivation of shear strength behaviour both during and after shock arrival showed evidence of strengthening behind the shock front, attributed to compression of the cross-linked epoxy resin polymer chains. Comparison of the change in lateral stress behind the shock to the behaviour of an epoxy resin possessing a similar USuP Hugoniot from the literature showed a different response; likely attributable to enhanced cross-linking present in this second resin. This result suggests that the embedded lateral gauges were, at least in part, measuring a physical response behind the shock within the resin. A Hugoniot elastic limit of 0.88 ± 0.04 GPa was derived and found to be of the same order of magnitude as results found elsewhere for similar materials.

Keywords

Shear Strength PMMA Incident Shock Longitudinal Stress Lateral Stress 

Notes

Acknowledgements

The authors wish to thank Mr Steven Mortimer of Hexcel, Duxford, UK, for supplying the cured resin samples. In addition, the authors gratefully acknowledge the invaluable aid of Mr Gary Cooper in carrying out this work.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • G. J. Appleby-Thomas
    • 1
    Email author
  • P. J. Hazell
    • 1
  • C. Stennett
    • 1
  1. 1.Cranfield Defence and SecurityCranfield UniversitySwindonUK

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