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Title: Deformation micromechanics of single glass fibre reinforced composites
Author: Hejda, Marek
ISNI:       0000 0001 3552 2827
Awarding Body: University of Manchester
Current Institution: University of Manchester
Date of Award: 2008
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The current work presents for the first time the application of luminescence spectroscopy in following the micromechanical deformation of glass fibre reinforced composites; this has been achieved using luminescence-active glass fibres prepared from glass doped with small amounts of Sm3+. Glass prepared in this way exhibited several relatively sharp and intense luminescence peaks observed in the range 550 nm to 700 nm. The luminescence band located at 648 nm was used for the calibration of the local strain state of the fibre due to its distinctive linear shift towards lower wavelengths with increasing strain and the factors affecting this shift were studied in detail. The fragmentation of both untreated and silane-treated Sm3+ doped glass fibre has been followed in detail and the behaviour analysed using a classical shear-lag analysis. Silane treatment slightly enhanced adhesion between glass fibre and epoxy resin, which was confirmed by a supplementary fragmentation study, which employed carbon nanotubes dispersed in the silane agent as an additional strain sensor. This work has demonstrated luminescence spectroscopy as a new significant development in the ability to follow local mechanics of the interface between glass fibres and transparent resins.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available