Fracture Behaviour of Chemically Treated Reshira-Epoxy Composite and Optimization of Parameters for Composite Fabrication

2012 ◽  
Vol 488-489 ◽  
pp. 182-187 ◽  
Author(s):  
M. Vasumathi ◽  
Murali Vela
Keyword(s):  
Sodium Hydroxide ◽  
Mechanical Performance ◽  
Natural Fiber ◽  
Epoxy Composite ◽  
Sodium Hydroxide Solution ◽  
Fiber Composite ◽  
Natural Fibre ◽  
Fiber Volume ◽  
Chemically Treated ◽  
Natural Fiber Composite

Natural fiber composite is nowadays used as an alternative to conventional materials. In this work, the natural fibre, Reshira is tried with epoxy resin, for the first time, as a composite material to be used for various applications. The reshira fiber is chemically treated with sodium hydroxide for better adhesion between fibre and resin. The reshira fiber–epoxy composite is fabricated with varying chemical concentrations of sodium hydroxide solution, fiber lengths and fiber volume fractions. The composite samples are subjected to tensile, flexural and impact tests and the optimum composition that produces maximum mechanical performance is selected. Further the optimum sample is tested for its fracture toughness property.

Mechanical Behaviour of Chemically Treated Reshira-Epoxy Composite at Cryogenic Temperatures

2012 ◽  
Vol 488-489 ◽  
pp. 718-723 ◽  
Author(s):  
M. Vasumathi ◽  
Murali Vela
Keyword(s):  
Room Temperature ◽  
Mechanical Performance ◽  
Natural Fiber ◽  
Epoxy Composite ◽  
Sodium Hydroxide Solution ◽  
Loss Modulus ◽  
Fiber Composite ◽  
Natural Fiber Composite ◽  
First Time ◽  
Cryogenic Conditions

Natural fiber composite has already proved its worth in various mechanical applications. Natural fibres with attractive properties such as low density, environment-friendliness and less processing work are widely available and provide an alternative to the conventional fibres. In this paper, the fibre reshira has been tried for the first time for cryogenic applications. Initially, the fibre is given chemical treatment with sodium hydroxide solution to enhance the adhesion between the fibre and the resin. The treated fibre is reinforced with epoxy resin and its properties such as storage modulus, loss modulus and Glass Transition Temperature are evaluated both at room temperature and under cryogenic conditions and these are compared to see which condition produces better mechanical performance.

Enhancing Mechanical Performance of Bagasse Fiber-Epoxy Composite by Surface Treatment

2020 ◽  
Vol 305 ◽  
pp. 8-17
Author(s):  
Felix Wong Wei Zie ◽  
Sujan Debnath ◽  
Mahmood Anwar ◽  
Abdul Hamid Abdullah
Keyword(s):  
Surface Treatment ◽  
Mechanical Performance ◽  
Natural Fiber ◽  
Epoxy Composite ◽  
Fiber Composite ◽  
Flexural Properties ◽  
Fiber Loading ◽  
Natural Fiber Composite ◽  
Bagasse Fiber ◽  
Soaking Temperature

Surface treatment is one of the method used to enhance the mechanical performance of natural fiber composite by improving the compatibility of fiber and matrix. Nevertheless, no proof can be shown on which surface treatment is the absolute solution in improving the mechanical properties of natural fiber composite. Different surface treatments might have needed for different kinds of natural fiber composites. In this research work, water, alkaline, permanganate, bleaching and acetylation treatment on bagasse fiber are evaluated and the effect of soaking temperature as well as the effect of fiber loading are investigated. The mechanical performance of bagasse fiber-epoxy composite was studied by carrying out three-point bending test and optical microscopy test. Among 0w/w% and 5w/w% fiber loading, composite with 1w/w% and 2w/w% fiber loading possessed the highest flexural strength and modulus respectively. However, poor wettability between fiber and matrix was observed at higher fiber loading. Water, bleaching, permanganate and acetylation treatment have minor positive effect on the mechanical performance of the composite, yet a great increment in flexural properties of alkali treated fiber composite was noticed such that 21.48% and 23.95% of improvement was made on flexural strength and flexural modulus respectively. Optical microscopy test indicated that alkali treatment is responsible for roughening the fiber surface, and improving the fiber wettability and dispersion. Depend on the surface treatment, effect of soaking temperature may vary. In some treatments, hotter soaking temperature led to faster rate of reaction, which resulted in greater surface roughening and greater cleansing effect. Despite of that, over reaction can be happened in some cases, which will result in lower flexural properties due to over damaged fiber. Hence, it was concluded that the alkaline treatment at room temperature could be the most effective surface treatment to enhance the mechanical performance of bagasse fiber-epoxy composite.

Surface roughness analysis and optimization during drilling on chemically treated natural fiber composite

2019 ◽  
Vol 16 ◽  
pp. 567-573 ◽  
Author(s):  
R. Vinayagamoorthy ◽  
Vikas Konda ◽  
Parikshit Tonge ◽  
Tumuluri Nikhil Koteshwar ◽  
M. Premkumar
Keyword(s):  
Surface Roughness ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Chemically Treated ◽  
Roughness Analysis ◽  
Natural Fiber Composite

Drilling associated parametric investigations on chemically treated natural fiber composite

2019 ◽  
Vol 16 ◽  
pp. 277-283
Author(s):  
R. Vinayagamoorthy ◽  
Tumuluri Nikhil Koteshwar ◽  
Vajhala Venu Madhav ◽  
Twarakavi Karthik Sai ◽  
Vikas Konda
Keyword(s):  
Natural Fiber ◽  
Fiber Composite ◽  
Chemically Treated ◽  
Natural Fiber Composite

Recycled PVC as Material for Natural Fiber Composite Manufacturing—study of Mechanical Performance and Durability

2020 ◽  
Vol 46 (1) ◽  
pp. 36-43
Author(s):  
Turku Irina ◽  
Kärki Timo
Keyword(s):  
Mechanical Properties ◽  
Mechanical Performance ◽  
Natural Fiber ◽  
Mechanical Test ◽  
Wood Flour ◽  
Fiber Composite ◽  
Wood Fibers ◽  
Before And After ◽  
The Matrix ◽  
Natural Fiber Composite

Manufacturing wood plastic composites from polyvinyl chloride (PVC) construction waste is one of the options for its continuously increasing scrap utilization. The aim of this study is to estimate the mechanical properties and durability of composites manufactured from recycled and commercially available PVC grades. The mechanical properties of PVC were reduced significantly after wood flour loading, showing weak compatibility between the matrix and the wood fibers. The composites from both PVC sources had weak durability, declining by up to 64% in tensile strength. The composite samples from recycled PVC displayed, however, better resistance to weathering compared to the composites from neat PVC. Chemical analysis of the composite surfaces by infrared spectroscopy and morphology study with a scan electron microscope before and after weathering confirmed the mechanical test results.

Optimization of Natural Fiber Composite Parameter Using Taguchi Approach

2016 ◽  
Vol 1133 ◽  
pp. 185-188 ◽  
Author(s):  
Fauziah Md Yusof ◽  
Mohd Khairul Hazami Abd Rahim ◽  
Ahmad Safwan Samsudin ◽  
Nor Hafiez Mohamad Nor ◽  
Zuraida Ahmad ◽  
...  
Keyword(s):  
Tensile Stress ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Tensile Load ◽  
Volume Ratio ◽  
Natural Fibre ◽  
Resin Matrix ◽  
Optimum Level ◽  
Taguchi’S Method ◽  
Natural Fiber Composite

The Taguchi’s method is a statistical tool to design and process optimization for achieving quality of product. Natural fibre composition is a brilliant option for the most widely applied fibre in the composite innovation. The advantages of natural fibre composites are renewable, environmental friendly, low cost, low density, flexibility of usage and tend to decompose (biodegradability). Since there are hundreds fibre that could be utilized in natural fibre composite, optimization in design of experiment is a promising in fabricating natural fiber composite. Taguchi’s method is used within this study whiche it can reduce the time consumed rather than doing all the experiment instead. The point of this project is to understand and study parameters of composite from three options of fibre, volume ratio and matrix against the tensile stress. From these parameters, it can show the optimum level that produces the highest strength against tensile load. The best combination obtained from the result of Taguchi’s method for each parameter are Kenaf fibre, 55:45 fraction of volume ratio, and ‘Bisphenol A epoxy resin’ matrix (Miracast epoxy 1517). This composition gives the highest tensile stress value of 30.5277 MPa.

scholarly journals Interfacial Compatibility Evaluation on the Fiber Treatment in the Typha Fiber Reinforced Epoxy Composites and Their Effect on the Chemical and Mechanical Properties

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1316 ◽  
Author(s):  
Samsul Rizal ◽  
Ikramullah ◽  
Deepu Gopakumar ◽  
Sulaiman Thalib ◽  
Syifaul Huzni ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Performance ◽  
Natural Fiber ◽  
Epoxy Composite ◽  
Fiber Composite ◽  
Alkali Treatment ◽  
Epoxy Composites ◽  
Fiber Reinforced ◽  
Pull Out ◽  
Interfacial Compatibility

Natural fiber composites have been widely used for various applications such as automotive components, aircraft components and sports equipment. Among the natural fibers Typha spp have gained considerable attention to replace synthetic fibers due to their unique nature. The untreated and alkali-treated fibers treated in different durations were dried under the sun for 4 h prior to the fabrication of Typha fiber reinforced epoxy composites. The chemical structure and crystallinity index of composites were examined via FT-IR and XRD respectively. The tensile, flexural and impact tests were conducted to investigate the effect of the alkali treated Typha fibers on the epoxy composite. From the microscopy analysis, it was observed that the fracture mechanism of the composite was due to the fiber and matrix debonding, fiber pull out from the matrix, and fiber damage. The tensile, flexural and impact strength of the Typha fiber reinforced epoxy composite were increased after 5% alkaline immersion compared to untreated Typha fiber composite. From these results, it can be concluded that the alkali treatment on Typha fiber could improve the interfacial compatibility between epoxy resin and Typha fiber, which resulted in the better mechanical properties and made the composite more hydrophobic. So far there is no comprehensive report about Typha fiber reinforcing epoxy composite, investigating the effect of the alkali treatment duration on the interfacial compatibility, and their effect on chemical and mechanical of Typha fiber reinforced composite, which plays a vital role to provide the overall mechanical performance to the composite.

Predictions of the Mechanical Performance of Leaf Fiber Thermoplastic Composites by FEA

2021 ◽  
Author(s):  
Faris M. AL-Oqla
Keyword(s):  
Composite Materials ◽  
Cantilever Beam ◽  
Mechanical Performance ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Fiber Composites ◽  
Fiber Types ◽  
Natural Fiber Composites ◽  
Pull Out ◽  
Structural Applications

The available potential plant waste could be worthy material to strengthen polymers to make sustainable products and structural components. Therefore, modeling the natural fiber polymeric-based composites is currently required to reveal the mechanical performance of such polymeric green composites for various green products. This work numerically investigates the effect of various fiber types, fiber loading, and reinforcement conditions with different polymer matrices towards predicting the mechanical performance of such natural fiber composites. Cantilever beam and compression schemes were considered as two different mechanical loading conditions for structural applications of such composite materials. Finite element analysis was conducted to modeling the natural fiber composite materials. The interaction between the fibers and the matrices was considered as an interfacial friction force and was determined from experimental work by the pull out technique for each polymer and fiber type. Both polypropylene and polyethylene were considered as composite matrices. Olive and lemon leaf fibers were considered as reinforcements. Results have revealed that the deflection resistance of the natural fiber composites in cantilever beam was enhanced for several reinforcement conditions. The fiber reinforcement was capable of enhancing the mechanical performance of the polymers and was the best in case of 20 wt.% polypropylene/lemon composites due to better stress transfer within the composite. However, the 40 wt.% case was the worst in enhancing the mechanical performance in both cantilever beam and compression cases. The 30 wt.% of polyethylene/olive fiber was the best in reducing the deflection of the cantilever beam case. The prediction of mechanical performance of natural fiber composites via proper numerical analysis would enhance the process of selecting the appropriate polymer and fiber types. It can contribute finding the proper reinforcement conditions to enhance the mechanical performance of the natural fiber composites to expand their reliable implementations in more industrial applications.

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