Articolul precedent |
Articolul urmator |
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Ultima descărcare din IBN: 2024-05-16 07:18 |
SM ISO690:2012 BUNEA, Marina. The effect of stacking sequence on the impact response of fabric reinforced epoxy hybrid composites. In: Patrimoniul cultural de ieri – implicaţii în dezvoltarea societăţii durabile de mâine, Ed. 8, 8-9 februarie 2024, Chişinău. Iași – Chișinău-Lviv: 2024, Ediția 9, p. 102. ISSN 2558 – 894X. |
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Patrimoniul cultural de ieri – implicaţii în dezvoltarea societăţii durabile de mâine Ediția 9, 2024 |
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Conferința "Yesterday’s cultural heritage – contribution to the development of tomorrow’s sustainable society" 8, Chişinău, Moldova, 8-9 februarie 2024 | ||||||
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The response of fabric reinforced epoxy hybrid composites under low velocity im-pact loadings at energy level of 45 J was investigated using a drop weight impact system. The aim of this study was to investigate the influence of stacking sequence on the impact behaviour. The studied epoxy hybrid composite materials were made of 17 layers by wet lay-up method. They were reinforced with simple plain pure (carbon, glass and aramid) and hybrid (carbon fibres/aramid fibres/glass fibres/tinned copper wires) fabrics with dif-ferent stacking sequences with ply orientation at 0°. The layers were arranged in sym-metrical order relative to the medial ply (made of hybrid fabric) regarding the fibre fabric type. The experimental results of impact tests and the tomographic images showed that the composites with outer layers made of glass fabric exhibited higher impact resistance as compared to the composites with outer layers made of carbon and aramid fabrics. In case of the composites with outer layers made of glass fabric, the ones with outer plies precededby aramid fabric sheets and medial layer made of carbon fabric sheet exhibited better impact response in comparison with the ones with outer plies preceded by carbon fabric sheets and the medial layer made of aramid fabric sheet. It was found that the replacing of used glass fabric with another glass fabric with a higher specific density improved their low velocity impact behaviour. The addition of different fillers (potato starch, aramid powder, carbon black and barium ferrite) into epoxy matrix between certain layers of the composite materials with outer plies made of glass fabrics, also, improved the impact response. So, the results showed, in this case, that the ones with outer plies preceded by carbon fabric sheets and medial layer made of aramid fabric sheet exhibited higher impact strength in comparison with the ones with outer plies preceded by aramid fabric sheets and the medial layer made of carbon fabric sheet. |
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