Impact of surface adaptation and<i>Acacia nilotica</i>biofiller on static and dynamic properties of sisal fiber composite

Vimalanathan, P.; Venkateshwaran, N.; Srinivasan, Srikant; Santhanam, V.; Rajesh, M.

doi:10.1080/1023666x.2017.1387689

Cited by 34 publications

(18 citation statements)

References 25 publications

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“…It was also observed from Figure 7 a and Table 1 , that the experimental (E’) max increases from 2.572 GPa at 1 Hz to 2.715 GPa at 50 Hz (5.56% increase) whereas, the predicted (E’) max increases from 2.350 GPa at 1 Hz to 2.580 GPa at 50 Hz (9.79%). A reason for this increment in the storage modulus in higher frequencies is due to less availability of time for rearrangement of molecules in the resin than in the lower frequencies [ 13 , 59 ]. Similarly, for the same frequency range of 1 HZ and 50 Hz, the increase in experimental and predicted T g values were observed from Figure 7 b that the difference being 19.61% and 18.66%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Temperature-Frequency–Dependent Viscoelastic Properties of Neat Epoxy and Fiber Reinforced Polymer Composites: Experimental Characterization and Theoretical Predictions

et al. 2020

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In general, aerospace structures manufactured using fiber reinforced polymer composites are exposed to fluctuating temperatures and subjected to cyclic loading during their service life. Therefore, studying the temperature-frequency dependent properties of composites for different fiber orientations is essential. However, such experiments are expensive, time-consuming and labor-intensive while theoretical models minimize these issues, but temperature-frequency-dependent viscoelastic models for predicting the full-range of the storage and loss moduli curves of composites are limited. In this study, the dynamic mechanical properties of a neat epoxy resin, unidirectional ([0°]6, [45°]6 and [90°]6), symmetric angle-ply [+45°/−45°/+45°]s and quasi-isotropic [±45°/0°/90°]s carbon/epoxy and glass/epoxy composite panels were investigated. Experiments were performed from room temperature (approximately 35 °C) to 160 °C at five different frequencies (1, 10, 20, 33 and 50 Hz). Two parameter viscoelastic models as function of temperature and frequency were used, and their applicability in predicting the storage and loss moduli for the entire region of the temperature curve is shown. The storage modulus values were compared and validated against the static flexural modulus values coupled with scanning electron microscopy analysis. The flexural and storage moduli values were found to be higher for [0°]6 carbon/epoxy composites, while the activation energy values were found to be higher in the case of [+45°/−45°/+45°]s carbon/epoxy composites compared with epoxy resin and other laminates in different orientations. The predicted results were in reasonably good agreement with the experiments. Both experimental and modeling approaches used in this study are highly valuable for designing aerospace composites for harsh in-service loading conditions.

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Section: Resultsmentioning

confidence: 99%

Temperature-Frequency–Dependent Viscoelastic Properties of Neat Epoxy and Fiber Reinforced Polymer Composites: Experimental Characterization and Theoretical Predictions

et al. 2020

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“…This increase is mainly due to the low arrangement of molecules as the availability of time is less at higher frequencies compared to lower frequencies. 46 The glass transition temperature (T g ) of the pure epoxy and composite specimens was obtained from the peaks of the tan d vs. temperature curves. Overall, the lowest T g was observed for the pure epoxy specimens, followed by the GFRP composites that showed slightly higher values at all the applied frequencies.…”

Section: Dynamic Mechanical Analysismentioning

confidence: 99%

The effect of hybridization on microstructure and thermo-mechanical properties of composites reinforced with different weaves of glass and carbon fabrics

Khan

Fikri

Irfan

et al. 2020

Journal of Composite Materials

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In this research, an experimental investigation of the microstructural, viscoelastic, and flexural properties of glass/carbon hybrid Fiber Reinforced Polymer (FRP) composites consisting of two different types of weaves (plain and twill) was carried out. The hybrid composites were manufactured by using the VARTM technique. The scanning electron micrographs showed that the hybridization resulted in a significant improvement in fiber-matrix adhesion of the hybrid composites compared to the pure glass fiber reinforced polymer (GFRP) composites based on plain weave glass fabrics, whereas the best fiber-matrix adhesion was observed in carbon fiber reinforced polymer (CFRP) composites. The synergistic effect due to hybridization lead to substantial improvements in the dynamic mechanical and flexural response of the manufactured composites. The hybrid composites exhibited a 149% increase in flexural strength, and a 144% increase in the flexural modulus compared to the GFRP composites, and an increase of 109% in the average value of the storage modulus at three different frequencies (1 Hz, 5 Hz and 10 Hz) compared to the GFRP composites. Whereas, the highest values were observed for pure CFRP composites for both flexural strength and modulus. A positive hybridization effect was also confirmed by the higher experimental values compared to the estimated results calculated by using the Rule of hybrid mixtures (RoHM). Due to higher fiber volume content, the GFRP exhibited the highest thermal stability compared to other specimens.

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“…11 Vimalanathan et al. 12 had studied the reinforcing effect of sisal fiber in the polyester matrix, and the results showed that the composite reinforced by fibers with the length of 20 mm and volume fraction of 20% produced the best mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9][10] Some studies have shown that sisal fiber can be added into polymer matrix as reinforcement to obtain better performance. 11 Vimalanathan et al 12 had studied the reinforcing effect of sisal fiber in the polyester matrix, and the results showed that the composite reinforced by fibers with the length of 20 mm and volume fraction of 20% produced the best mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of fiber modified by alkali/polyvinyl alcohol coating treatment on properties of sisal fiber plastic composites

Zhou

Zhang

et al. 2020

Journal of Reinforced Plastics and Composites

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Demand for natural fibers reinforced composites is growing as an alternative to synthetic fiber reinforced plastic composites. However, poor compatibility between natural fiber and matrix has limited its development. Therefore, it is necessary to improve their interfacial adhesion to improve the comprehensive properties of composites. In this work, sisal fibers were subjected to an alkali/polyvinyl alcohol coating treatment by an ultrasonic impregnation method, and the sisal/high-density polyethylene composite was prepared by a twin-screw extruder. The Fourier transform infrared spectroscopy was used to characterize the modification effect of sisal fiber. The surface morphology of sisal fiber and the interfacial morphology of sisal/high-density polyethylene composites were observed. The mechanical properties and water absorption of sisal/ high-density polyethylene composites were also studied. The results show that alkali/polyvinyl alcohol coating compound treatment can effectively improve the interfacial adhesion between sisal fiber and high-density polyethylene, improve the mechanical properties of composite, and reduce water absorption. Alkali/polyvinyl alcohol coating compound treatment is a very environment-friendly, cost-effective fiber modification method when compared with traditional modification methods. It is helpful for the development and application of natural fibers reinforced composites.

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Impact of surface adaptation andAcacia niloticabiofiller on static and dynamic properties of sisal fiber composite

Cited by 34 publications

References 25 publications

Temperature-Frequency–Dependent Viscoelastic Properties of Neat Epoxy and Fiber Reinforced Polymer Composites: Experimental Characterization and Theoretical Predictions

Temperature-Frequency–Dependent Viscoelastic Properties of Neat Epoxy and Fiber Reinforced Polymer Composites: Experimental Characterization and Theoretical Predictions

The effect of hybridization on microstructure and thermo-mechanical properties of composites reinforced with different weaves of glass and carbon fabrics

Effect of fiber modified by alkali/polyvinyl alcohol coating treatment on properties of sisal fiber plastic composites

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