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Non destructive examination of composite structures using dielectric examination

Banks, W.M. and Hayward, D. and Pethrick, R.A. (2007) Non destructive examination of composite structures using dielectric examination. In: 16th International Conference on Composite Materials, 2011-07-20, Kyoto.

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Dielectric measurements are widely used in the laboratory to probe the dynamics of molecules, particularly the dynamics of polymer molecules. The dielectric technique exploits the fact that many molecules, although electrically neutral posses an asymmetric distribution of charges which can be approximated to an electric dipole. The (usually thermal) motion of the molecule can be detected by the interaction of this dipole with a time varying electric field. The great advantage of the technique is that no transducers or sensors are required; the direct application of an electric field produces a directly measurable electric response over a frequency range of MHz to GHz. This paper discusses the practical application of dielectric measurements to composite structures and the information that can be obtained on the state of the polymer in polymer composite matrix materials.

Item type: Conference or Workshop Item (Paper)
ID code: 9788
Keywords: composite structures, dielectric analysis, Mechanical engineering and machinery, Chemistry
Subjects: Technology > Mechanical engineering and machinery
Science > Chemistry
Department: Faculty of Engineering > Mechanical and Aerospace Engineering
Faculty of Science > Pure and Applied Chemistry
Depositing user: Strathprints Administrator
Date Deposited: 22 Jul 2011 15:01
Last modified: 24 Jul 2015 12:55

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