Browsing by Author "Godara, Ajay"
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Item Compressibility of CNT-grafted fibrous reinforcements: A theory(Springer, 2010-04) Lomov, Stepan Vladimirovitch; Koissin, Vitaly; Godara, Ajay; Gorbatikh, Larissa; Verpoest, I.; Karahan, Mehmet; Uludağ Üniversitesi/Teknik Bilimler Meslek Yüksekokulu.; AAK-4298-2021; 8649952500The paper introduces a theoretical model of compressibility of a nanotube forest with randomly oriented nanotubes, which is applied to predict compressibility of a fibrous reinforcement with CNT-grafted fibres. It is shown that the pressure needed to achieve the target fibre volume fraction of the perform increases drastically when CNT are present in the preform. This can lower the achievable fibre volume fraction for economical vacuum assisted light-RTM manufacturing techniques and increase the pressure requirements in autoclave processing. The modelling is complemented with experimental investigation of compressibility of woven carbon performs with CNT grown on the carbon twill 2/2 fabric using CVD method.Item Influence of carbon nanotubes grown on the fibres on damage progression in woven carbon-epoxy composites(Sage Publications, 2013-04) Godara, Ajay; Karahan, Mehmet; Uludağ Üniversitesi/Teknik Bilimler Meslek Yüksekokulu.; AAK-4298-2021; 8649952500This study examined basic mechanical properties and damage development properties of composite plates produced with carbon nanotubes grown on 2 x 2 twill woven carbon fabric and compared the results with composite materials without carbon nanotubes. The results revealed that there were significant decreases in mechanical properties and characteristic strain values where damage initiation and progression of the composite samples produced from carbon nanotubes grown on fabrics. It was found that Young's modulus values decreased by 15-17%. Characteristic strain values where damage threshold decreased by 36-53%.