ATENA Conferences System, NAV 2012 17th International Conference on Ships and Shipping Research

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HYBRID COMPOSITE HULL PANELS FABRICATED USING VACUUM BAGGING TECHNIQUES
Claire De Marco Muscat-Fenech, Jeremy Cortis, Charles Cassar

Last modified: 2012-09-15

Abstract


Approved marine grade orthophthalic polyester, POLYLITE® 440-M850, resin and E-glass 300, 400 and 450 g/m2 CSM & 400 and 600 g/m2 woven roving layers are the constituent components of the hybrid laminated composite hull panels. The enhanced composite panel is to be fabricated using vacuum bagging techniques. Tests are conducted in accordance with ISO 527-4, 14125, 14126, 14130 standards testing methods to obtain the relevant material properties.  This characterisation shows that the resulting composite panel, when compared to the traditional boat building hand lay up technique, is one of superior mechanical properties, which is more efficient and fit for purpose.  The weight percentage reinforcement originally within 35–40% is expected to rise to 50–60%, producing a high fibre content laminate with thickness reductions in the order of around 40%.  As a consequence the material properties, namely young’s modulus, ultimate tensile and compressive strength, flexural stress and modulus are enhanced.  Additionally, the resulting laminate is to be cored using DIAB Divinycell® H Foam, a closed cell linear material.  The laminated high fibre to resin ratio (by weight) vacuum bagged compacted sandwich construction is expected to save 30-50% of laminate weight compare with the equivalent hand lay up method.


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