Low-temperature interlaminar shear strength of reactor irradiated glass-fibre-reinforced laminates

Glass-fibre-reinforced plastics (GFRPs) are candidate insulating materials for superconducting magnet coils in future fusion reactors. Therefore, the influence of radiation damage (gamma and fast neutrons) especially on the interlaminar shear behaviour of these materials has to be investigated caref...

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Bibliographic Details
Published in:Cryogenics (Guildford) 1996, Vol.36 (8), p.611-617
Main Authors: Humer, K., Spieβberger, S., Weber, H.W., Tschegg, E.K., Gerstenberg, H.
Format: Article
Language:English
Subjects:
Epoxy resins
Fiber reinforced materials
fibre-reinforced plastics
Fractography
Insulating materials
interlaminar shear
Irradiation
Laminated composites
mechanical properties
Nuclear reactors
Polyimides
Radiation damage
Scanning electron microscopy
Shear strength
Superconducting magnets
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Summary:Glass-fibre-reinforced plastics (GFRPs) are candidate insulating materials for superconducting magnet coils in future fusion reactors. Therefore, the influence of radiation damage (gamma and fast neutrons) especially on the interlaminar shear behaviour of these materials has to be investigated carefully. Different types of GFRP laminate (two-dimensional E- or S-glass fibre reinforcements, epoxy or polyimide resins) have been irradiated at room temperature in the TRIGA reactor (Vienna, Austria) and at 5 K in the FRM Munich (Garching, Germany) up to a neutron fluence of 5 × 10 22m −2 ( E > 0.1 MeV) prior to short-beam-shear (SBS) testing at 77 K. After low-temperature irradiation, half of the samples were subjected to a warm-up cycle to room temperature before testing at 77 K. Results on the influence of different radiation sources, irradiation temperatures and annealing cycles as well as the boron content of some laminates on the interlaminar shear strength (ILSS) are compared and discussed, together with microstructural observations made with a scanning electron microscope.
ISSN:0011-2275
1879-2235
DOI:10.1016/0011-2275(96)00027-6