J. Naveen

Bio: J. Naveen is an academic researcher from VIT University. The author has contributed to research in topic(s): Ultimate tensile strength & Kevlar. The author has an hindex of 14, co-authored 33 publication(s) receiving 842 citation(s). Previous affiliations of J. Naveen include Universiti Putra Malaysia & Kongu Engineering College.

Glass fiber-reinforced polymer composites – a review:

Abstract: Glass fibers reinforced polymer composites have been prepared by various manufacturing technology and are widely used for various applications. Initially, ancient Egyptians made containers by glass...

Hybrid fiber reinforced polymer composites – a review

Abstract: The polymer matrix composites have been widely used for many applications. These are light in weight and easy for manufacturing. The hybrid fiber reinforced composites have been prepared to enhance the mechanical, thermal, damping properties compared to single-fiber reinforced composites. The fiber reinforced hybrid composites consist of two or more fiber in a matrix system. The different fibers were reinforced with suitable matrix for preparing the hybrid composites using various manufacturing methodology. The hybrid composites are used for many application and replacing wood, wood fiber composites and conventional materials. The mechanical properties (tensile, flexural and impact), dynamic, tribological and water absorption properties of natural fiber reinforced hybrid polymer composites and natural/synthetic fiber reinforced hybrid polymer composites were reported.

Mechanical and physical properties of sisal and hybrid sisal fiber-reinforced polymer composites

Abstract: Growing awareness about eco-friendly materials and environmental regulations have encouraged researchers to use natural resources for structural applications. Natural fibers such as sisal, banana, kenaf, jute, and oil palm are abundantly available; they are cheap and possess superior mechanical properties. Sisal fiber is one of the most promising reinforcements in polymer composites because of its higher tensile strength, modulus and impact strength. Traditionally, sisal fibers were used to make ropes, fancy articles, carpets, etc. There has been growing interest in finding potential structural applications for using sisal fiber-based polymer composites, especially in automobile, marine, and aircraft structures. This chapter addresses developments in sisal fiber-based thermoset and thermoplastic composites and the effects of surface modifications through various treatments. This chapter also deals with the effects of sisal fiber hybridization with other plant and synthetic fibers on mechanical and physical properties.

Characterization of sisal/cotton fibre woven mat reinforced polymer hybrid composites:

Abstract: The present research work addressed the results of experimental investigation on the mechanical properties and free vibration behaviours of sisal/cotton fabric reinforced polyester hybrid composites. Influence of fibre content and changing layer pattern (CLP) on the mechanical properties and free vibration characteristics are analysed. Hybrid composites are fabricated with simple hand lay-up method followed by compression moulding process. Natural frequency and modal damping values of hybrid composites are analysed by experimental modal analysis. Mechanical properties of composites are measured according to ASTM standards. It is found that an increase in the lamina content in the composite increase the mechanical and damping properties. The maximum mechanical properties are obtained for 40% fibre volume fraction (Vf) in sisal and cotton direction. Maximum natural frequency is found at 40% fibre Vf. By CLP, mechanical properties and damping characteristics are found intermittence of sisal and cotton direct...

Thermal degradation and viscoelastic properties of Kevlar/Cocos nucifera sheath reinforced epoxy hybrid composites

Abstract: The aim of this research work is to develop high performance structural composites using Kevlar 29 (K) and Cocos nucifera sheath (CNS). The Kevlar and CNS laminates were fabricated by using hand lay-up method followed by hot pressing. The weight ratios of Kevlar/CNS are as follows 100/0 (S1), 75/25 (S2), 50/50 (S3), 25/75 (S4), 0/100 (S5). Thermal and viscoelastic properties of laminated composites were investigated as a function of temperature using thermogravimetric (TGA) and dynamic mechanical analyzer (DMA). The obtained results revealed that the thermal stability, char residue of S2 laminate was higher compared S3, S4 and S5 laminates. Moreover, S2 laminates showed comparable thermal stability with Kevlar/epoxy composites (S1). Differential scanning calorimetry (DSC) results revealed that hybrid composite (S2) offers a virtuous resistance or stability towards heat in the epoxy composites . Viscoelastic analysis results showed that the storage modulus (E′) and loss modulus (E″) of S2 composites were higher among the laminates due to improved interfacial interactions and effective stress transfer rate. Moreover, the damping of hybrid laminates (S2) almost closer to Kevlar/epoxy laminates (S1). Hence, it was observed that hybrid Kevlar/CNS composites (S2) can be efficiently utilized for advanced structural applications where rigidity, thermal stability along with renewability are prime requirements.

A Review on Potentiality of Nano Filler/Natural Fiber Filled Polymer Hybrid Composites

Abstract: The increasing demand for greener and biodegradable materials leading to the satisfaction of society requires a compelling towards the advancement of nano-materials science. The polymeric matrix materials with suitable and proper filler, better filler/matrix interaction together with advanced and new methods or approaches are able to develop polymeric composites which shows great prospective applications in constructions and buildings, automotive, aerospace and packaging industries. The biodegradability of the natural fibers is considered as the most important and interesting aspects of their utilization in polymeric materials. Nanocomposite shows considerable applications in different fields because of larger surface area, and greater aspect ratio, with fascinating properties. Being environmentally friendly, applications of nanocomposites offer new technology and business opportunities for several sectors, such as aerospace, automotive, electronics, and biotechnology industries. Hybrid bio-based composites that exploit the synergy between natural fibers in a nano-reinforced bio-based polymer can lead to improved properties along with maintaining environmental appeal. This review article intended to present information about diverse classes of natural fibers, nanofiller, cellulosic fiber based composite, nanocomposite, and natural fiber/nanofiller-based hybrid composite with specific concern to their applications. It will also provide summary of the emerging new aspects of nanotechnology for development of hybrid composites for the sustainable and greener environment.

Fiber-Reinforced Polymer Composites: Manufacturing, Properties, and Applications.

Abstract: Composites have been found to be the most promising and discerning material available in this century. Presently, composites reinforced with fibers of synthetic or natural materials are gaining more importance as demands for lightweight materials with high strength for specific applications are growing in the market. Fiber-reinforced polymer composite offers not only high strength to weight ratio, but also reveals exceptional properties such as high durability; stiffness; damping property; flexural strength; and resistance to corrosion, wear, impact, and fire. These wide ranges of diverse features have led composite materials to find applications in mechanical, construction, aerospace, automobile, biomedical, marine, and many other manufacturing industries. Performance of composite materials predominantly depends on their constituent elements and manufacturing techniques, therefore, functional properties of various fibers available worldwide, their classifications, and the manufacturing techniques used to fabricate the composite materials need to be studied in order to figure out the optimized characteristic of the material for the desired application. An overview of a diverse range of fibers, their properties, functionality, classification, and various fiber composite manufacturing techniques is presented to discover the optimized fiber-reinforced composite material for significant applications. Their exceptional performance in the numerous fields of applications have made fiber-reinforced composite materials a promising alternative over solitary metals or alloys.

Impact behaviour of hybrid composites for structural applications: a review

Abstract: Recently published research indicates that natural fibre based polymer composites have limited applications in advanced structural systems due to their low impact performance. However, natural fibres have great potential for reducing the product weight, lowering material cost, and renewability. Hybrid composites made from a combination of natural/synthetic fibres, natural/natural fibres, or synthetic/synthetic fibres are also receiving attention from both researchers and the industry for structural applications owing to the tailored mechanical and impact properties of these materials. The hybridisation process is one of the paramount and more efficient ways to strengthen and improve the performance of composite materials. This review paper examines the impact properties of hybrid composites manufactured with the aim of improving their structural characteristics, and in particular, is focused on the impact resistance and penetration behaviour of hybrid composites reinforced with natural and synthetic fibres as well as their suitability for modern structural applications.

An overview on 3D printing technology: Technological, materials, and applications

Abstract: Digital fabrication technology, also referred to as 3D printing or additive manufacturing, creates physical objects from a geometrical representation by successive addition of materials. 3D printing technology is a fast-emerging technology. Nowadays, 3D Printing is widely used in the world. 3D printing technology increasingly used for the mass customization, production of any types of open source designs in the field of agriculture, in healthcare, automotive industry, locomotive industry and aviation industries. 3D printing technology can print an object layer by layer deposition of material directly from a computer aided design (CAD) model. This paper presents the overview of the types of 3D printing technologies, the application of 3D printing technology and lastly, the materials used for 3D printing technology in manufacturing industry.

Tensile and flexural properties of polylactic acid-based hybrid green composites reinforced by kenaf, bamboo and coir fibers

Abstract: Bio-based hybrid green composites in unidirectional configuration were prepared by using kenaf, bamboo and coir fibers to reinforce polylactic acid (PLA) polymer matrix. Three types of hybrid green composites: kenaf-coir/PLA, bamboo-coir/PLA and kenaf-bamboo-coir/PLA composites were investigated by tensile and flexural tests. Scanning electron microscopy and optical microscopy were used to observe their microstructural failures. Tensile strength of kenaf-bamboo-coir/PLA composites achieved 187 MPa, approximately 20 and 78% higher than bamboo-coir/PLA and kenaf-coir/PLA, respectively. Young’s moduli of the three composites were low, ranging from 6.0 to 7.5 GPa. High flexural strength was obtained in both kenaf-bamboo-coir/PLA (199 MPa) and bamboo-coir/PLA (206 MPa) composites, approximately 16 and 20% higher than that of kenaf-coir/PLA, respectively. However, kenaf-coir/PLA composites showed the highest flexural modulus, approximately 70% higher than other combinations. Higher strain energy per unit volume required to break (toughness) was characteristic of kenaf-bamboo-coir/PLA composites. It was found that the combination of high strength and stiffness of bamboo and kenaf fibers and high ductility of coir fiber improved tensile and flexural strengths compared to those of single fiber green composites.