“…This comparison allows for the assessment of the model’s accuracy in capturing the behaviour of the hybrid composites under three-point bending. In the FE simulations, the elastic properties of glass and carbon plies (Table 3), as well as the damage properties (Table 4), are extracted from reputable sources such as Rahimian Koloor et al, 34 Ribeiro et al, 35 Ribeiro Junior et al, 36 while the values of fracture energies are obtained from the properties provided by Shi et al 37 By utilizing data from these sources, the model can effectively capture the mechanical response of the hybrid composites in the FE simulations.Figure 5.Representative FE model for three-point bending analysis.…”
Hybrid composites are an advanced solution that offers multifunctional capabilities, including exceptional strength-to-weight ratios, vibrational damping and impact absorption. This work describes the damping capacity and flexural behaviour of a hybrid fibrous-particulate system composed of glass/carbon fabrics and three distinct micro-inclusions: silica particles, carbon waste microfibres, and cement. A statistical methodology based on the full factorial design is applied to identify the effects of fibre stacking sequence, including carbon-C5, glass-G5, C2G3, G3C2, GCGCG and CG3C, microparticle inclusions and matrix/fibre volume fraction (40/60 and 60/40) on damping and bending responses. A non-linear finite element (FE) analysis is conducted to explore the stress distribution based on the stacking sequence and predict the failure mechanisms of the hybrid laminate. The results indicate significant interaction effects, with hybrid architectures showcasing approximately 33% higher performance compared to glass fibre composites. A greater dependence on the fibre layup sequence is found for the damping factor, flexural modulus and strength. Notably, the incorporation of silica microparticles leads to an increase in flexural strength. Furthermore, a greater volume fraction of the matrix phase enhances the rheological efficiency in terms of the fibre-particle interface. Carbon fibre layers placed symmetrically on both beam sides (CG3C) and bottom layers (G3C2) significantly enhance the bending performance of hybrid composites.
“…This comparison allows for the assessment of the model’s accuracy in capturing the behaviour of the hybrid composites under three-point bending. In the FE simulations, the elastic properties of glass and carbon plies (Table 3), as well as the damage properties (Table 4), are extracted from reputable sources such as Rahimian Koloor et al, 34 Ribeiro et al, 35 Ribeiro Junior et al, 36 while the values of fracture energies are obtained from the properties provided by Shi et al 37 By utilizing data from these sources, the model can effectively capture the mechanical response of the hybrid composites in the FE simulations.Figure 5.Representative FE model for three-point bending analysis.…”
Hybrid composites are an advanced solution that offers multifunctional capabilities, including exceptional strength-to-weight ratios, vibrational damping and impact absorption. This work describes the damping capacity and flexural behaviour of a hybrid fibrous-particulate system composed of glass/carbon fabrics and three distinct micro-inclusions: silica particles, carbon waste microfibres, and cement. A statistical methodology based on the full factorial design is applied to identify the effects of fibre stacking sequence, including carbon-C5, glass-G5, C2G3, G3C2, GCGCG and CG3C, microparticle inclusions and matrix/fibre volume fraction (40/60 and 60/40) on damping and bending responses. A non-linear finite element (FE) analysis is conducted to explore the stress distribution based on the stacking sequence and predict the failure mechanisms of the hybrid laminate. The results indicate significant interaction effects, with hybrid architectures showcasing approximately 33% higher performance compared to glass fibre composites. A greater dependence on the fibre layup sequence is found for the damping factor, flexural modulus and strength. Notably, the incorporation of silica microparticles leads to an increase in flexural strength. Furthermore, a greater volume fraction of the matrix phase enhances the rheological efficiency in terms of the fibre-particle interface. Carbon fibre layers placed symmetrically on both beam sides (CG3C) and bottom layers (G3C2) significantly enhance the bending performance of hybrid composites.
“…Researchers studied many other microparticles such as hexagonal boron nitride (hBN) [18], SiC [19], fly ash [20], Al 2 O 3 [21], silicon [22], TiO 2 [23] and silica [24], etc. These micro particulates were interlaced with a polymer matrix to enhance their structural properties such as mechanical, thermal, electrical and water-absorbing properties of MPP composites.…”
The objective of this work is to enhance the thermal conductivity and electrical properties of polymer hybrid composites through a systematic novel Grey Relation Grade Analysis (GRGA) optimization approach. This involves reinforcing the hybrid composites with hexagonal Boron Nitride (hBN) and various kinds of natural fibers or fillers. The development of a unique technology to produce multiphase composites using 2% of natural fibers or fillers such as coir fiber (CF), rice husk filler (RF), wood filler (WF), banana fiber (BF) and sugarcane fiber (SF) along with hBN (1, 3, 5 wt.%) particulates as reinforcements in epoxy matrix. The Taguchi L15 matrix array is utilized to fabricate interlaced composite samples via hand layup molding. Ultrasonic waves are used to ensure the uniform distribution of hBN filler into the matrix. Analysis of variance (ANOVA) and GRGA reveal the significant results. It shows that the multiphase hybrid composites exhibit good thermal conductivity when higher content of hBN (5 wt.%) particulate for all the micro particulate polymer (MPP) composites. Multi-response optimization shows that the micro banana fiber (2 wt.%) interlaces with hBN (5 wt.%) composite exhibits the higher thermal conductivity and electrical resistance compared to all other natural fiber interlaced composites. The aforementioned MPP composite has thermal conductivity of 1.03 W/m.K and electrical resistance of 279.88 Giga Ohms. Besides, the wood filler interlaced hBN (5 wt.%) composite shows the minimum dielectric constant compared to all other natural fiber composites. This desirable result is caused by the proper dispersion of hBN with the matrix which encourages interlocking with the fiber and the matrix. Maximum electrical resistance is observed for composite containing 5 wt.% of h-BN and 2 wt.% of BF. The developed MPP composite could be used in heat shields, electrical insulation components, and interior automotive components like dashboards, luggage compartments and interior walls.
“…In the second step, the property estimated in the first step is used as the “matrix” modulus and homogenized with the second reinforcing phase. In paper [ 34 ] a multiscale finite element technique and a sequential methodology are used to estimate the mechanical properties of hybrid composites made of a polymer matrix, reinforced with carbon fibers and silica microparticles. The results show a very good agreement with the experimental data.…”
Hybrid composites, usually combining natural and synthetic reinforcing filaments, have gained a lot of attention due to their better properties than traditional two-component materials. For structural applications of hybrid composites, there is a need to precisely determine their mechanical properties on the basis of the mechanical properties, volume fractions, and geometrical distributions of constituent materials. The most common methods, such as the rule of mixture, are inaccurate. More advanced methods, giving better results in the case of classic composites, are difficult to apply in the case of several types of reinforcement. In the present research, a new estimation method is considered, which is simple and accurate. The approach is based on the definition of two configurations: the real, heterogeneous, multi-phase hybrid composite configuration, and the fictitious, quasi-homogeneous one, in which the inclusions are “smeared out” over a representative volume. A hypothesis of the internal strain energy equivalence between the two configurations is formulated. The effect of reinforcing inclusions on the mechanical properties of a matrix material is expressed by functions of constituent properties, their volume fractions, and geometrical distribution. The analytical formulas are derived for an isotropic case of a hybrid composite reinforced with randomly distributed particles. The validation of the proposed approach is performed by comparing the estimated hybrid composite properties with the results of other methods, and with experimental data available in the literature. It is shown that a very good agreement is obtained between experimentally measured hybrid composite properties and their predictions resulting from the proposed estimation method. The estimation errors are much lower than the errors of other methods.
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