Elastoplastic Behavior of Unidirectional Hybrid Composites Containing SiO2 Nanoparticles Under Transverse Tension

The aim of this study was to investigate the influence of new hybrid composites of TiO2 or SiO2 nanoparticles with poly(2,2’- bithiophene) on 50% cotton/50% polyester fabric and sheep skin leather surface properties. The dispersion-based newly made nanocomposites were analyzed to determine conductivity, particle size, polydispersity and Zeta potential. The finished textile and leather materials were characterized in terms of functionalization treatments performance by: surface resistivity, water contact behaviour, physical-mechanical characteristics and photocatalytic properties. SEM analysis was used to investigate the distribution of nanoparticles on the textile and leather materials surface. Textile materials treated with SiO2/poly(2,2’-bithiophene) nanocomposite with concentration 98 wt% nanoparticles of SiO2 and leather treated with poly SiO2/poly(2,2’-bithiophene) nanocomposite with concentration of 95 wt% nanoparticles of SiO2 showed lower resistivity values, confirming the conductive properties of silica. The higher photodegradation efficiency of functionalized materials has been obtained for textile material treated with poly TiO2/(2,2’-bithiophene)with concentration of 95 wt% nanoparticles of TiO2 and for leather material treated with TiO2/poly(2,2’-bithiophene) with concentration of 98 wt% nanoparticles of TiO2, respectively.

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A micromechanical approach to the viscoelasticity of unidirectional hybrid composites

Composites ◽

10.1016/0010-4361(91)90669-8 ◽

1991 ◽

Vol 22 (2) ◽

pp. 113-119 ◽

Cited By ~ 24

Author(s):

L.E. Govaert ◽

E.L.J.C.J. D'Hooghe ◽

A.A.J.M. Peijs

Keyword(s):

Hybrid Composites ◽

Micromechanical Approach ◽

Unidirectional Hybrid

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Analytical hybrid effect prediction and evolution of the tensile response of unidirectional hybrid fibre-reinforced polymers composites for civil engineering applications

Journal of Composite Materials ◽

10.1177/0021998320911956 ◽

2020 ◽

Vol 54 (22) ◽

pp. 3205-3228

Author(s):

Filipe Ribeiro ◽

José Sena-Cruz ◽

Fernando G Branco ◽

Eduardo Júlio ◽

Fernando Castro

Keyword(s):

Yield Stress ◽

Hybrid Composites ◽

Damage Model ◽

Strain Curve ◽

Strength Distribution ◽

Progressive Damage ◽

Layer By Layer ◽

Hybrid Effect ◽

Unidirectional Hybrid ◽

Progressive Damage Model

The performance of a progressive damage model in quantitative hybrid effect prediction of a comprehensive set of different 16 unidirectional interlayer (layer-by-layer) hybrid composites was assessed. Composites, produced by the hand lay-up method, made out of four different commercially available dry unidirectional fabric materials, namely high-modulus carbon, standard carbon, E-glass and basalt, were tested. Tensile tests on single fibres were performed in order to determine their Weibull strength distribution parameters, which were used as inputs of the progressive damage model. Reasonably good agreement between analytical and experimental hybrid effect results was obtained, which allowed to estimate satisfactorily the reference strengths of the unidirectional low strain composite materials. Next, an existing analytical model for the simulation of stress–strain curve of hybrid composites was adapted to contemplate the hybrid effect, which allowed to predict the following properties of unidirectional hybrid combinations: ‘yield’ stress (or pseudo-yield stress), pseudo-ductile strain and strength. It was verified as well that predictions of the three properties referred to were in close agreement with the test results. Finally, damage mode maps were used in the analysis of these properties and, furthermore, of the hybrid effect and the elastic modulus of hybrid combinations.

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