Intraply and interply hybrid composites based on E-glass and poly(vinyl alcohol) woven fabrics: tensile and impact properties (original) (raw)
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Composite Structures, 2013
In this study, the effect of stacking sequence on the impact behavior of sequentially stacked woven/knit fabric glass/epoxy hybrid composites was investigated. 2D (double layer) fabric was used as a woven fabric and rib and milano fabrics were used as knitted fabrics. Woven and knit fabric layers were sequentially stacked in six different variations to fabricate eight ply woven/knit fabric hybrid composites. The composite laminates were processed by hand lay-up technique using 3 mm thick spacers and cured under pressure of 8 MPa for 100 min. at 100°C, followed by cooling at room temperature under same pressure. The impact and post-impact (CAI) behavior of hybrid composites at various impact energies were investigated. FEA results were compared with experimental results. Results show that specimens having outer layer of woven fabric exhibited better impact properties than that of the specimens having outer layer of knitted fabric. The worst performance in terms of impact resistance was observed in knit/ knit composites. FEA analysis was in a good agreement with the experimental results.
International Journal of Integrated Engineering, 2021
Bamboo reinforced hybrid composites are needed in claim to progress use of polymer composite technology. This paper describes a hand lay-up laminate process using plain-woven bamboo/E-glass woven/epoxy hybrid composite with the Design of experiment (DOE) 2 factor with 3-level and analysis of variance (ANOVA) was implemented for an evaluation against how the bamboo and e-glass woven affect the mechanical properties of hybrid composite in various sequence. The present study considers influence of plain-woven bamboo and eglass woven laminated hybrid composite towards its tensile and charpy impact test performance. The results show that the 2-layer composites withstood better tensile strengths 185.372 MPa for EG/BW/EG while charpy impact 158.224 KJ/m 2 for EG/BW sequence respectively. Experiments results show that concentrate on both lay-up sequence and layers are important effect factors for tensile and charpy performance. It had been proven that both the layers and also the lay-up sequence demonstrated significantly different leads to terms of the mechanical performance.
Studies on Mechanical Properties of Banana / E-Glass Fabrics Reinforced Polyester Hybrid Composites
2016
The purpose of this research work is to evaluate and compare the mechanical properties of laminates prepared of different composition of Banana and E-Glass fabrics. The mechanical properties evaluated are tensile strength, flexural strength, impact strength and hardness. The density of each of the laminates and water absorption properties are also evaluated. The six laminates of banana and E-glass fabrics of dimension 240*240*3 mm 3 is fabricated by hand layup and vacuum bagging method. The impregnation of laminates is done by using polyester resin as matrix material. Finally, curing is done in the autoclave for 4 hours at 70 0 C. From the results of the testing process, it is found that the maximum tensile strength, maximum flexural strength, maximum impact strength and maximum hardness is observed in pure glass fabric laminate and minimum in pure banana fabric laminate. The pure E-glass fabric laminate absorbs more amount of water and pure banana fabric laminate absorbs minimum am...
Evaluation of Impact Strength of Epoxy Based Hybrid Composites Reinforced with E-Glass/Kevlar 49
Mehran University Research Journal of Engineering and Technology
In hybridization different fibers are stacked layer by layer to produce laminates have specific strength and stiffness and employed in light weight high strength applications. Physically mean fabricated hybrid composites used in aerospace, under water, body armors and armed forces establishment. In present work drop-weight impact response of hybrid composites were investigated by making laminates of hybrid composites. In Hybridization layers of E-glass (roving) and Kevlar 49 fabrics stacked with epoxy resin. The layers formulation was set up by hand layup method. Impregnationsof epoxy resin of commercial grade (601A) in fabrics were accomplished by VRTM (Vacuum Bagging Resin Transfer Molding) technique. Layup placementof Glass fibers/ Kevlar at 0°/90°, 45°/45° and 30°/60° were set for this work. Mechanical properties such as impact strength, bear resistance and break resistance were analyzed by usingASTM D-256 and D-3763 standard.Experimental investigation was conducted using instrumented Dart impact and Izod Impact test. E-glass/Kevlar 49 at layup 0°/90°and 30°/60°exhibited improvedimpact strength than 45°/45°. The surface morphology and fractography were also investigated by capturing different images of Specimens by using the SEM (Scanning Electron Microscopy). The fiberreinforcement and matrix fracture were also observed by using SEM.The SEM images suggest that epoxy resin tightly bonded with Kevlar fibers whereas Glass fibers were pulled out from laminations.
Post-impact mechanical characterisation of E-glass/basalt woven fabric interply hybrid laminates
Post-impact properties of different configurations (symmetrical and non-symmetrical) of hybrid laminates including E-glass and basalt fibre composites, all with volume fraction of fibres equal to 0.38 ± 0.02 and manufactured by RTM, have been studied. With this aim, interlaminar shear strength tests and four-point flexural tests of laminates impacted with different energies (0, 7.5, 15 and 22.5 J) have been performed. Acoustic emission (AE) localisation and AE evolution with applied flexural stress was studied to support impact damage characterisation, provided by SEM and transient thermography. The results indicate that a symmetrical configuration including E-glass fibre laminate as a core for basalt fibre laminate skins presents the most favourable degradation pattern, whilst intercalation of layers may bring to further improvement of the laminate properties, but also to more extended and complex damage patterns.
Examination of Mechanical Behavior of E-Glass Fabric Reinforced Polyester Composites
International Journal of Engineering and Advanced Technology, 2019
Cooling system this study aims at fabrication Glass Fiber Reinforced Polyester (G-P) Composites and investigation of their Physico-Mechanical Properties. In the present work Polyester based composites were fabricated manually by compression. Mechanical Properties are evaluated according to American Society for Testing and Materials (ASTM) D-638 and D-790 respectively. Further, Surface Morphology is emphasized to study their microstructure under varying magnifications.
Journal of Material Science & Engineering
The objective of this work is to compare the mechanical properties including tensile, bending and impact properties between different glass fiber architecture reinforced polyester composites which are fabricated by a hand lay-up technique. The effects of stacking sequences of glass fibers consists of five layers which mainly are plain woven, short fiber, and sandwich layer glass composites on the mechanical properties of composites have been studied. The results showed that the tensile and bending properties of all different composite laminates are significantly higher compared to the neat resin. The plain woven glass reinforced polyester composites showed the highest values compared with other composite laminates. As the glass fiber mats a core are tightly packed and absorbs the impact stresses and distributes them evenly in the composites sandwich layer, the glass composites showed the highest value of impact strength compared with other composite laminates. Moreover, from SEM investigations, in these composites, there is an inverse relationship between the amount of delamination and the amount of hackles, and as the hackles increase the mechanical properties including tensile and bending of these composites are enhanced.
NYLON/GLASS FABRICS SYNTHETIC REINFORCED POLYMER HYBRID COMPOSITES
Publication Impact Factor (PIF) :1.026 www.sretechjournal.org ABSTRACT Composite materials are being widely used in many light weight & high strength applications because of their excellent directional oriented properties. Their use becomes imperative in many corrosive environments. Commercially available synthetic fibers are used widely in many applications for composites fabrication owing to their high strengths and modulus. They also have good strength comparable with synthetic fiber reinforced composites. To take advantages of both natural and synthetic fibers, they can be combined in the same matrix to produce hybrid composites that take full advantages of best properties of the constituents. In this work, an attempt has been made to check the effort of fibers when it has been evaluated its mechanical and chemical properties to see the behavior of the composite material on nylon/glass fabrics synthetic reinforced polymer hybrid composites
Impact properties of compression moulded commingled E-glass–polypropylene composites
Plastics, Rubber and Composites, 2002
Abstract: The impact properties of commingled E-glass-polypropylene composites with varying fibre architectures have been investigated. The fabric structures include balanced and unbalanced twill weaves and a three-dimensional woven fabric. Comparative data for glass mat thermoplastics are included and additional comparisons with crossply continuous filament tape laminates are also made. All the materials were processed into flat panels via non-isothermal compression moulding. First, voidage was correlated with processing ...
Hybrid composites have been considered as modern materials for many engineering applications, yet there is still a major concern on the influence of stacking sequence configuration in hybrid composite laminates especially under impact loading. Therefore, the focus of this paper is to determine the optimized stacking sequence of glass/Kevlar fiber hybrid composite laminates under impact loading. Hybrid composite laminates were fabricated using vacuum bagging method with four different stacking sequences known as H1, H2, H3 and H4. Low velocity drop weight impact test (ASTM D7136) was conducted using a hemispherical nose impactor diameter of 12 mm with a mass of 6 kg at impact energy levels of 10 J, 20 J, 30 J, and 40 J. From the results obtained, H3 specimen which has a stacking sequence of glass fiber in the exterior part with Kevlar fiber in the interior part was concluded as the optimized stacking sequence with better impact resistance properties. H3 specimen recorded a higher value in peak load, maximum initiation energy, high impact strength, high strength to weight ratio and high total energy absorbed to weight ratio. In addition, it was observed that H3 specimen has less damaged area compared to H1, H2, and H4 specimens. This study contributes knowledge on the impact resistance properties of hybrid composite laminates which will be much useful for material selection and product development.