Study of Mechanical Properties of Natural and Hybrid Yarns Reinforcements

2015 ◽  
Vol 1117 ◽  
pp. 231-234
Author(s):  
Aina Bernava ◽  
Maris Manins ◽  
Guntis Strazds

The present work was focused on development and studies of mechanical properties that natural fibres have in the woven reinforcements made from hemp and flax as well as hybrid yarns of hemp and glass fibres. Natural fibres such as hemp and flax are biodegradable, have low weight and show good flexibility. Glass fibre is widely used in the industry when low cost and good performance is required. The hemp yarns (100 Tex and 1186 Tex), the flax yarns (678 Tex) and the hybrid yarn of hemp and glass fibres (1644 Tex) were used to develop woven reinforcement structures. Average surface density for reinforcements of hemp yarns is 83- 529 g/m2 and for reinforcements of hybrid yarns 738- 741 g/m2.

2018 ◽  
Vol 7 (2) ◽  
pp. 110-112
Author(s):  
Sasikumar Gnanasekaran ◽  
Sivasangari Ayyappan

Natural fibres namely sisal, jute, kenaf, hemp, abaca and banana are mainly used in industries for developing Natural fibres composites. They find many applications such as automobiles, furniture, packing and construction due to many merits such as their low cost, good mechanical properties, non-toxic, low weight, less damage to processing equipment, improved surface finish, abundant and renewable resources. The objective of this paper is to review the applications of various kenaf fibre reinforced polymer composites which will provide a base for further research in this area.


Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1369
Author(s):  
Sanjeev Kumar ◽  
Lalta Prasad ◽  
Vinay Kumar Patel ◽  
Virendra Kumar ◽  
Anil Kumar ◽  
...  

In recent times, demand for light weight and high strength materials fabricated from natural fibres has increased tremendously. The use of natural fibres has rapidly increased due to their high availability, low density, and renewable capability over synthetic fibre. Natural leaf fibres are easy to extract from the plant (retting process is easy), which offers high stiffness, less energy consumption, less health risk, environment friendly, and better insulation property than the synthetic fibre-based composite. Natural leaf fibre composites have low machining wear with low cost and excellent performance in engineering applications, and hence established as superior reinforcing materials compared to other plant fibres. In this review, the physical and mechanical properties of different natural leaf fibre-based composites are addressed. The influences of fibre loading and fibre length on mechanical properties are discussed for different matrices-based composite materials. The surface modifications of natural fibre also play a crucial role in improving physical and mechanical properties regarding composite materials due to improved fibre/matrix adhesion. Additionally, the present review also deals with the effect of silane-treated leaf fibre-reinforced thermoset composite, which play an important role in enhancing the mechanical and physical properties of the composites.


2019 ◽  
Vol 57 (2) ◽  
pp. 208-214
Author(s):  
Zuzana Mitalova ◽  
Juliana Litecka ◽  
Dusan Mital ◽  
Marta Harnicarova ◽  
Jan Valicek ◽  
...  

The paper deals with destructive testing of �new� group of material - Wood Plastic Composite (in short WPC). WPC emerging from a fusion of two different kinds of components - thermoplastics matrix and natural reinforcement (fibres or flour). Natural fibres offer several advantages - they are renewable, inexpensive, low-density, good isolate a sound and low cost. These components are mixed under the influence of high temperature and then pressed to make various shapes. This material contains cracks localized on the interface between the wood and plastic. These cracks occurred due to inhomogeneity of WPC and affected mechanical properties of final WPC product. The testing of mechanical properties (tensile test and bending test) were determinate in VUHZ Dobra (Ostrava) - following the ISO standards. Significant differences between mechanical properties after testing were caused by non-perfect encapsulation between components and non-homogeneity of materials.


Author(s):  
K. Rajaguru ◽  
V. Vijayan ◽  
S. Saravanan ◽  
A. Godwin Antony

In this investigation, soot particles were doped with glass fibre and its characteristic and mechanical properties were examined. The glass fibres with soot particles composite were prepared via compression mould method and the effect of glass fibre on the mechanical properties of the composites was studied. The various wt. % of soot particles as 0%, 0.1%, 0.5% and 1.0% were added into epoxy. Tensile, flexural and impact tests were conducted. The addition of more than 0.1%wt. of soot particles with glass fibre has resulted in high mechanical properties compared to other weight ratios.


2018 ◽  
Vol 51 (3) ◽  
pp. 224-243 ◽  
Author(s):  
Jyoti Jain ◽  
Shorab Jain ◽  
Shishir Sinha

The progress in the development of composites with natural fibers for various applications in different sectors witnesses remarkable success worldwide in the last decade. Among the various natural fibers existing worldwide, pineapple leaf fibers (PALFs) possess remarkable mechanical properties because of the maximum content of cellulose (∼80%) among all natural fibers. In spite of having few limitations such as hydrophilicity, its advantages such as low cost, low weight, and biodegradability overweigh their limitations. The PALFs are poorly reported in the literature as a reinforcement in epoxy material. Bagasse, wheat straw, and coir have been successfully reinforced with epoxy resin; but inspite of having highest tensile strength among all natural fibers, PALF’s are seldom used. PALF has been characterized chemically, morphologically, and thermally. Using thermal analysis, the models were fitted to calculate its activation energies at different fraction levels using different heating rates. PALF epoxy composites have been prepared using the hand layup method. The effect of fiber loading has also been studied for morphological, chemical, mechanical, and thermal properties of composites. Composites with 10% fiber loading have better mechanical properties in comparison to composites with other fiber loading. Scanning electron microscopic micrographs of fractured surfaces have been analyzed for all fiber loading composites, and the results have been successfully studied linking the stated work of other distinguished researchers of this arena.


Author(s):  
Raza Muhammad Khan ◽  
Asim Mushtaq

The aim of this study is to enhance the tensile and flexural strength of polyamide (nylon 6, 6) by incorporation of glass fibre. Nylon has high elasticity, strength, toughness and maintain mechanical properties at elevated temperatures. The method employed for enhancement of properties is by the reinforcement of glass fibre. Glass fibre is the most extensively used reinforcement material. It is a lightweight, extremely solid, durable, low cost material that moderafly stiff. The composition of glass fibre was kept at 0 wt.%, 30 wt.% and 50 wt.% in nylon 6,6 blend. Initially, samples were manufactured by injection molding of nylon 6,6 and glass fibre. The pressure and velocity profiles at 0 wt.%, 30 wt.% and 50 wt.% reinforced nylon 6,6 are also compared. The samples thus formed were checked for shrinkage. The samples were tested for their tensile and flexural properties. The mechanical properties of polyamide (nylon 6,6) significantly improves by increasing glass fibre reinforcement.    


Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1468
Author(s):  
Ummu Raihanah Hashim ◽  
Aidah Jumahat ◽  
Mohammad Jawaid

Basalt fibre (BF) is one of the most promising reinforcing natural materials for polymer composites that could replace the usage of glass fibre due to its comparable properties. The aim of adding nanofiller in polymer composites is to enhance the mechanical properties of the composites. In theory, the incorporation of high strength and stiffness nanofiller, namely graphene nanoplatelet (GNP), could create superior composite properties. However, the main challenges of incorporating this nanofiller are its poor dispersion state and aggregation in epoxy due to its high surface area and strong Van der Waals forces in between graphene sheets. In this study, we used one of the effective methods of functionalization to improve graphene’s dispersion and also introducing nanosilica filler to enhance platelets shear mechanism. The high dispersive silica nanospheres were introduced in the tactoids morphology of stacked graphene nanosheets in order to produce high shear forces during milling and exfoliate the GNP. The hybrid nanofiller modified epoxy polymers were impregnated into BF to evaluate the mechanical properties of the basalt fibre reinforced polymeric (BFRP) system under tensile, compression, flexural, and drop-weight impact tests. In response to the synergistic effect of zero-dimensional nanosilica and two-dimensional graphene nanoplatelets enhanced the mechanical properties of BFRP, especially in Basalt fibre + 0.2 wt% GNP/15 wt% NS (BF-H0.2) with the highest increment in modulus and strength to compare with unmodified BF. These findings also revealed that the incorporation of hybrid nanofiller contributed to the improvement in the mechanical properties of the composite. BF has huge potential as an alternative to the synthetic glass fibre for the fabrication of mechanical components and structures.


2017 ◽  
Vol 44 (7) ◽  
pp. 43-48 ◽  
Author(s):  
A.A. Nikiforov ◽  
S.I. Vol'fson ◽  
N.A. Okhotina ◽  
R. Rinberg ◽  
L. Kroll

The results of investigating the influence of processing additives from a group of lubricants on the degree of comminution of glass fibres during extrusion and the properties of composites based on biobased polyamide 1010 with different degrees of filling with chopped glass fibre are presented.


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