Effect of Fiber Loading and Surface Treatment on the Mechanical Properties of Coconut Sheath Fiber Reinforced Epoxy Composites

2014 ◽  
Vol 984-985 ◽  
pp. 178-184
Author(s):  
K. Santhanam ◽  
A. Kumaravel
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Alkali Treatment ◽  
Fiber Reinforced ◽  
Absorption Properties ◽  
Fiber Reinforced Composite ◽  
Fiber Loading ◽  
Fiber Properties ◽  
Reinforced Composite

In the present work coconut sheath fiber has been used to prepare the composite material with epoxy resin. First the untreated coconut fiber was used to prepare the composite material then the coconut sheath fibers were treated with NAOH to modify the fiber properties. Then the effect of fiber loading and alkali treatment were evaluated and investigated. The mechanical properties of alkali treated fibers found to be higher than the untreated coconut sheath fiber reinforced composite materials. The water absorption properties of alkali treated fibers were found to be higher than the untreated coconut sheath fiber reinforced composite materials.

Strength tests of fiber-reinforced composite with ultra-high molecular weight polyethylene

2018 ◽  
Vol 68 (3) ◽  
pp. 293-301
Author(s):  
Rafał Brożek ◽  
Szymon Kubanek ◽  
Beata Czarnecka ◽  
Ryszard Koczorowski ◽  
Barbara Dorocka-Bobkowska
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Composite Material ◽  
High Molecular Weight ◽  
Organic Polymer ◽  
Fiber Reinforced ◽  
Uhmwpe Fiber ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Ultra High Molecular Weight

Introduction. Ultra-high molecular weight polyethylene (UHMWPE) fibers are inert, thus their adhesion to the organic polymer matrix of the composite material may not be rewarding. Therefore, these types of fibers have not yet come into widespread use in dentistry. Aim of the study. To evaluate selected strength characteristics of the UHMWPE fiber-reinforced composite whose surface was chemically activated and then impregnated with a mixture of dimethacrylate resins and coated with a microhybrid composite material. Material and method. Tests were carried out which allowed to evaluate selected mechanical properties of the material under static stretching and shearing. Results. Based on the experiments the following values were calculated: Young’s elastic modulus Et = 3583.97 ± 1325.75 MPa, tensile stress σ = 59.73 ± 7.54 MPa, maximum tensile force Fmax = 121.23 ± 17.92 N, linear extension εt = 0.03 ± 0.003 and tangential stress τt = 4.99 ± 1.19 MPa. The loss of adhesion of the material to the hard tissues of the tooth was typical of the mixed adhesive-cohesive breakthrough. Conclusions. The study revealed high and desired mechanical strength in both the tensile test and in the shear test, which may justify the effective use of this type of fibers in clinical practice. The phenomena of saturation and penetration of the resin into the space between the fiber bundles occurring in the oxidation process did not negatively affect the mechanical properties of the material tested.

scholarly journals Carbon Fiber Polymer Composites

2019 ◽  
Vol 1 (1) ◽  
pp. 276-280
Author(s):  
Lenka Markovičová ◽  
Viera Zatkalíková ◽  
Patrícia Hanusová
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Polymer Composite ◽  
Fiber Orientation ◽  
Environmental Damage ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
The Matrix

Abstract Carbon fiber reinforced composite materials offer greater rigidity and strength than any other composites, but are much more expensive than e.g. glass fiber reinforced composite materials. Continuous fibers in polyester give the best properties. The fibers carry mechanical loads, the matrix transfers the loads to the fibers, is ductile and tough, protect the fibers from handling and environmental damage. The working temperature and the processing conditions of the composite depend on the matrix material. Polyesters are the most commonly used matrices because they offer good properties at relatively low cost. The strength of the composite increases along with the fiber-matrix ratio and the fiber orientation parallel to the load direction. The longer the fibers, the more effective the load transfer is. Increasing the thickness of the laminate leads to a reduction in the strength of the composite and the modulus of strength, since the likelihood of the presence of defects increases. The aim of this research is to analyze the change in the mechanical properties of the polymer composite. The polymer composite consists of carbon fibers and epoxy resin. The change in compressive strength in the longitudinal and transverse directions of the fiber orientation was evaluated. At the same time, the influence of the wet environment on the change of mechanical properties of the composite was evaluated.

The Effects of Ultrasonic Treatment on Fiber-Reinforced Composite Materials

2009 ◽  
Author(s):  
Chad Braver ◽  
Matthew Tumey ◽  
Adam Harlow ◽  
Qingyou Han
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Ultrasonic Treatment ◽  
Void Content ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Three Point Bending ◽  
Reinforced Composite ◽  
The Matrix ◽  
Reinforcement Fiber

The mechanical properties of fiber-reinforced composite materials are highly dependent on proper saturation of the resin within the reinforcement fibers. The research evaluates the effect of ultrasonic treatment during composite curing, in an effort to increase interlaminar bonding strength, lower void content, and improve the matrices ability to transfer stresses to the reinforcement fiber. The testing methods that were performed evaluated the effects or the ultrasonic treatment on the specimen in three point bending, and shear between layers of the matrix. The mechanical properties and the microstructure of the test specimen are discussed.

Mechanical Properties of Gamma-Irradiated Natural Fiber Reinforced Composites

2018 ◽  
Vol 23 ◽  
pp. 24-38 ◽  
Author(s):  
Mohammad Shahriar Kabir ◽  
M. Sahadat Hossain ◽  
Monir Mia ◽  
Md. Nazru Islam ◽  
Md.Mahmudur Rahman ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Tensile Properties ◽  
Uv Radiation ◽  
Natural Fiber ◽  
High Energy ◽  
Fiber Reinforced ◽  
Synthetic Compounds ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite

Today we are facing a great problem due to the synthetic compounds, as most of them are not environmentally friendly. Natural fibers are the fibers which are obtained from the nature and these fibers are environment friendly. So the use of natural fiber is increasing day by day in different sectors. But natural fiber has some limitations for widely use, one of them is the hydrophilic nature. So it cannot be widely used. That is why we need to incorporate them with low mechanical property synthetic compounds, widely known as composite materials. When we are using natural fiber with polymeric materials by forming composites, the fiber properties greatly influence the strength or mechanical properties. So researchers are trying to reduce this weakness of the natural fiber reinforced composite materials. One of the widely used methods for the improvement of tensile properties is the application of radiation (gamma and UV). The control use of gamma and UV-radiation increases the tensile properties in some extent for the use of materials in practical applications. The reason of this increment in tensile properties is the high energy radiation making crosslink among the molecules. In all the respect of fiber reinforced composite highest tensile properties are observed at a certain dose of gamma and UV-radiation.

Mechanical Properties Contrast Between Fiber Reinforced Composite Poles and Traditional Poles

2013 ◽  
Vol 405-408 ◽  
pp. 2690-2693
Author(s):  
Jing Gong ◽  
Dong Xue Ren ◽  
Chao Zhou ◽  
Guo Qing Ma
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Steel Tube ◽  
Fiber Reinforced ◽  
Concrete Filled Steel Tube ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Technical Specifications ◽  
Maximum Stresses ◽  
Reinforced Composite Material

Take advantages of concrete to improve the stiffness of fiber reinforced composite material(GFRP), reference to the existing dimensions of concrete-filled steel tube pole, applicate GFRP-concrete structure in 35 kV transmission line. Change the various parameters of the poles in ANSYS, compare the maximum deformations and the maximum stresses of GFRP tube-concrete pole and concrete-filled steel tube pole. Results show that different parameters have different impacts on the mechanical properties of the poles, suitable parameters of GFRP tube-concrete pole were got and the technical specifications of the application of GFRP in various voltage levels should be perfected.

scholarly journals Fabrication and Experimental Analysis of Treated Snake Grass Fiber Reinforced with Polyester Composite

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
I. Jenish ◽  
A. Felix Sahayaraj ◽  
M. Appadurai ◽  
E. Fantin Irudaya Raj ◽  
P. Suresh ◽  
...  
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Tribological Properties ◽  
Natural Fiber ◽  
Alkali Treatment ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Reinforced Polymer

The selection of fiber is predominant for natural fiber-reinforced polymer composite materials, which should have easy extraction and good bonding with considerable strength. In this paper, some chemical treatments were done on the fiber material to increase interfacial bonding between the snake grass fiber (Sansevieria ehrenbergii) and polyester matrix, such as alkali treatment (NaOH), potassium permanganate treatment, sodium carbonate treatment, hydrogen peroxide treatment, and calcium carbonate treatment. The chopped snake grass fiber-reinforced polymer composite material was prepared by keeping 25 wt.% of fiber and 30 mm fiber length reinforced with an unsaturated polyester resin that was cured with the help of the catalyst methyl ethyl ketone peroxide (MEPK). Cobalt naphthenate was used as an accelerator. Tribological properties were discussed for the highly potential sample with the help of a pin-on-disc wear tester, and the results were analysed by the Taguchi L9 orthogonal array. This paper exhibited the best mechanical and tribological properties among those chemical-treated fibers used in fiber-reinforced composite materials and untreated fibers used in fiber-reinforced composite materials. CaCO3 treatment provided higher tensile strength (45 MPa), impact strength (3.35 J), and hardness (27 BHN). Finally, the mechanical and tribological characterization of the samples was done with the aid of SEM (scanning electron microscope).

Sign in / Sign up

Export Citation Format

Share Document