EFFECT OF HYBRIDIZATION ON OPEN-HOLE TENSION PROPERTIES OF WOVEN KEVLAR/GLASS FIBER HYBRID COMPOSITE LAMINATES (original) (raw)

The Effect of Hybridization on Mechanical Behaviour of Kevlar and Natural Fiber Reinforced Composite

International Journal of Mechanical and Production Engineering Research and Development, 2019

Fiber Reinforced Polymer (FRP) composite is finding application in many fields such as structural elements, roof panels, wind mill blades etc., due to its low cost, high strength to weight ratio and stiffness to weight ratio. In this paper, initially four varieties of FRP reinforced with natural fibers like jute, flax, sisal and hemp have been numerically studied under modal analysis and static structural analysis by using ABAQUS/CAE-6.14 software. Moreover, numerical simulation and experimental analysis were carried out by replacing top and bottom natural fabric layer by Kevlar-29, keeping the same core of natural fibers. The substantial increase of around 54% in natural frequency and 20 % in flexural strength were observed in the hybrid FRP compared to Natural fabric FRP. The panels were fabricated by vacuum bagging technique and the volume fraction of fibers was 38%. Amongst all the varieties of FRP panels under study, the hybrid panel made of kevlar and hemp showed maximum natural frequencies

Physical and mechanical properties of hybrid composites using Kevlar fibre and nano-SiO2

Advances in Materials and Processing Technologies, 2022

The current study aims to examine the mechanical and physical properties of Kevlar fibre/nano-silica/epoxy hybrid composites. The hand layup process followed by compression moulding was used to prepare a hybrid composite with different weight percentages (0%, 1%, 3%, and 5%) of nano SiO 2 and four layers of the Kevlar fibres. Hardness, flexural, tensile, and impact tests were performed to evaluate mechanical properties. Nano SiO 2 and Kevlar fibre improve the mechanical properties of the hybrid composites up to 3 wt.%. Rockwell Hardness tests suggest that the hardness of composites (K3) has improved up to 29% compare to K0. Tensile strength is about double at 3 wt.% nano SiO 2 compared to neat laminates. The K3 has highest impact strength has increased by 50%. Flexural properties also increase up to 3 wt.% nano SiO 2 reinforcement. Density, water absorption, and thickness swelling test wear were performed for the evolution of physical properties. Morphological analysis was done with the help of the field emission scanning electron microscopy (FESEM) technique.

Deformation and failure behavior of hybrid composite laminates made of Glass Epoxy and woven Kevlar Epoxy

Materials Today: Proceedings, 2020

Due to the demand of reducing costs for high strength materials, hybridizing composite laminates could offer the alternative in producing materials with superior properties at reduced costs. Moreover, preparing samples and conducting experiments for these materials are very costly and tedious. Therefore, in order to establish the complex failure behavior of hybrid composite laminates, finite element analysis and simulation has been the choice for failure prediction. Accepting, this challenge, this paper investigates the deformation and failure behavior of composite plates made of woven Kevlar Epoxy (KE), unidirectional Glass Epoxy (GE), and their hybrids (KE/GE) under uniaxial tension. Solid plates and plates with circular hole were modeled using commercial finite element software, ANSYS APDL. In general, all laminates having the layup of [h4/04/-h4]s but the hybrid laminate arrangement varies between the number of GE and woven KE laminates. Using the built-in failure criteria function provided by ANSYS APDL, the first ply failure (FPF) and last ply failure (LPF) loads for several configuration of hybrid laminates were determined. In addition, the angle of fiber orientation, h, was varied from 0°to 90°to generate the trend of failure curves. The results show that the FPF and LPF curves for the plates with hole are lower compared to the solid plate. Nevertheless, the patterns of the failure curves are very much influenced by the angle of fiber orientation. This indicates that the fiber angles have a significant effect on the strength of hybrid composite laminates. Compared to GE and woven KE composite laminates, the hybridization between unidirectional lamina and woven lamina could also influence the pattern of the failure curves. It could be concluded that the current study is useful; and has provided knowledge about the failure and deformation behavior of hybrid composite laminates by combining unidirectional (GE) and woven (KE) laminates.

Evaluation of tensile properties on Glass/Carbon/Kevlar fiber reinforced hybrid composites

Composites made of synthetic fiber combined hybrid composites are find many industrial applications. Due to high strength to light weight ratio, higher modulus significantly reduced cost. In this research, composite fiber in woven mat form is added to matrix element with varying stacking sequences of symmetrical laminates. Four various hybrid laminate composites having glass, kevlar and carbon fibers are the reinforcements in varying stacking sequences are produced using hand lay-up technique followed by compression molding. The mechanical strength of the produced composite is evaluated. Experimental results found that composite having stacking sequences of Carbon-Kevlar-Carbon-Kevlar-Carbon (C-K-C-K-C) has the highest value of tensile strength 385.09 MPa respectively. Scanning Electron Microscope (SEM) is used to examine the morphology of fractured surface of hybrid composites during testing. SEM images revealed that hybrid composite with C-K-C-K-C had less defects on its fractured surface compared to other counter parts of the hybrid composites.

Investigation of Flexural Properties of Glass-Kevlar Hybrid Composite

2016

Composite materials are attracting huge attention due to their superior properties and being inert to most atmospheric effects. They have high strength to weight ratio and can be moulded into the required shape that can be used for various applications as replacement for metals. This paper consists of study of flexural behaviour of hybrid composite reinforced with woven glass fiber and Kevlar fiber in ply configuration. The three point bending test according to ASTM 790 was performed experimentally on this composite laminate. The fiber volume fraction to matrix volume fraction was taken 40%-60%. The volume fraction of the individual fibers in the composite was varied to determine the effects on the flexural strength of the composite laminate. The laminates prepared were having dimension 80mm X 13mm X 3mm. After testing the H4 configuration had the highest flexural strength of 217.91 MPa also the H2 configuration had maximum flexural modulus. The result of the study can be used for t...

Mechanical performance of woven kenaf-Kevlar hybrid composites

Journal of Reinforced Plastics and Composites, 2014

Hybrid composites offer a combination of advantages of constituent components to produce a material with determined properties. In the present work, woven hybrid composite was prepared by hand lay-up method in laminate configuration. Kevlar/kenaf hybrid composites were fabricated with total fibre content of 30% and the ratio of Kevlar/kenaf varies in weight fraction of 78/22, 60/40, 50/50, 26/74, and 32/68, respectively. The Kevlar/epoxy and kenaf/epoxy were also prepared for comparison. The mechanical properties of hybrid, kenaf/epoxy, and Kevlar/epoxy composites were tested. Morphological properties of tensile fracture surface of hybrid composites were studied by scanning electron microscopy. Results have established that the mechanical properties of kenaf-Kevlar hybrid composites are a function of fibre content. The hybrid composites with Kevlar/kenaf (78/22) ratio exhibited better mechanical properties compared to other hybrid composites. This result indicates the potential of Kevlar-kenaf hybrid composite for impact applications.

Evaluation of mechanical properties of hybrid composite laminates reinforced with glass/carbon woven fabrics

IOP conference series, 2018

Traditional fiber reinforced polymer (FRP) composite that is often fabricated from single type of reinforcement has shown its ability to replace the conventional metallic material counterparts. However, due to several stringent requirements on ductility, this has affected the performance of FRP composites for the structural applications. Therefore, hybrid composites, which combine two or more fiber reinforcements, have been introduced in order to overcome the short of traditional FRP composites. This paper investigates the mechanical properties of three different arrangements of hybrid composites made from glass fiber (plain-woven and stitched bi-axial ±45˚) and plain-woven carbon fiber. Vacuum assisted resin transfer moulding method was employed to fabricate the hybrid composite panels. Mechanical properties such as tensile strength, flexural strength and volume fraction of the hybrid composites were determined per ASTM standards. Experimental results indicate that the [CWW] 6 arrangement, where C and W are weaved carbon fiber and glass fiber respectively, were superior in terms of mechanical properties.

Global Journal of Engineering Science and Researches Estimating the Tensile Behavior of Hybrid Composite Laminates

The hybrids composite has emerged and have the potential reinforcement material for composites and thus gain attraction by many researchers. This is mainly due to their applicable benefits have they offer low density, low cost, renewable, biodegradability and environmentally harmless and also comparable mechanical properties with synthetic fiber composites. The laminates are reinforced with three different hybridization of fibre materials namely hybridization of E-glass and Kevlar fibres,hybridization of E-glass and jute fibres,hybridization of jute and kevlar and LY556 Epoxy resin and HY951 hardener.Hand layup method is used for fabrication of laminates.

Microstructural Study and Evaluation of Few Mechanical Properties of Hybrid Composites

2017

Limitations of monolithic composite can be addressed by hybrid composites which are gaining importance in field of composites. An attempt has been made in making of hybrid composite comprising of bi-directional plain weaved Kevlar, S-glass and E-glass fibers reinforcements and epoxy matrix by vacuum bagging and hand layup methods. Few tests such as Hardness, Impact strength and Inter-laminar shear strength tests are conducted as per ASTM standards. Characterization of composites was carried out using SEM to analyze the material bonding, defects and failure behavior under load conditions. S-glass composite outperformed other composites performing better in all the test conditions but when combined with Kevlar the reduction in property is minimal and even microstructural study showed bonding of S-glass and Kevlar hybrids compared to S-glass is acceptable

Experimental Investigation on Tensile Properties of Carbon Fabric-Glass Fabric-Kevlar Fabric-Epoxy Hybrid Composite Laminates

Revue des Composites et des Matériaux Avancés-Journal of Composite and Advanced Materials, 2021

In this paper, composite and hybrid composite materials were prepared using the hand lay-up method, with carbon, glass, and Kevlar fabrics as the reinforcing materials and epoxy as a matrix. The tensile test was performed to determine the optimal ratio of epoxy resin in carbon fabric/epoxy, glass fabric/epoxy, and Kevlar fabric/epoxy composites in terms of tensile properties. It was found that the optimal ratio of epoxy in terms of tensile properties to impregnate the used Kevlar fabric, glass fabric, and carbon fabric was around 45%wt, 3%wt, and 30 %wt, respectively. The effect of fabric content and stacking sequences, with a fixed epoxy content, on the hybrid composites' tensile properties were also investigated. The tensile properties of the prepared composites were compared to determine the most favorable preparation conditions for obtaining a hybrid laminate that has high tensile properties and is suitable for a wide range of applications at a low cost.