Investigation of Tensile Properties of Manila Fibre Reinforced Composite

2015 ◽  
Vol 766-767 ◽  
pp. 96-99 ◽  
Author(s):  
B. Vijaya Ramnath ◽  
V.M. Manickavasagam ◽  
C. Elanchezhian ◽  
A. Rajendra Prasad ◽  
C. Kavin ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Mechanical Stability ◽  
Glass Fibers ◽  
Homogeneous Distribution ◽  
Reinforced Composite ◽  
Three Samples ◽  
Reinforcing Agent ◽  
Natural Composites ◽  
Composite Samples ◽  
Break Load

In the present scenario, composites are beginning to play a major role in day to day applications. Suitable properties can be imparted by selection or orientation of fibers during the manufacturing process. This paper demonstrates the natural composites made up of Manila as reinforcing agent with epoxy resin as matrix enclosed between glass fibers. Glass fibers, also known as woven rovings, are used to improve the surface finish and provide better strength and rigidity to the composite. Using hand lay-up method, fibers of Manila are arranged in alternate layers. The strength of composites depends on the fiber-matrix interfacial bonding. Three composite samples are prepared and mechanical stability of the composite is determined by tensile test. It is seen that there is not much variation in the ultimate strength of the three samples. On an average, it is found that average break load of the composite is 4.8 KN and the corresponding displacement is 9.08 mm. All the three samples exhibit almost similar elongation of about 18 % and the average ultimate tensile strength is 31.66 MPa. The reason for uniform tensile properties is due to a homogeneous distribution of fibers in all the three samples.

Evaluation of the Flexural Properties of Pineapple Reinforced Polymer Composite for Automotive and Electrical Applications

2014 ◽  
Vol 893 ◽  
pp. 271-274 ◽  
Author(s):  
B. Vijaya Ramnath ◽  
C. Vinodh Krishna ◽  
S. Karthik ◽  
K. Saravanan ◽  
V.M. Manickavasagam ◽  
...  
Keyword(s):  
Natural Fiber ◽  
Low Cost ◽  
Glass Fibers ◽  
Natural Fibers ◽  
Flexural Properties ◽  
Fiber Reinforced ◽  
Horizontal Orientation ◽  
Reinforced Composite ◽  
Reinforced Polymer ◽  
Three Samples

The interest in natural fibers has been rising in the past decade due to low cost and abundant availability. Though the composites made from artificial fibers possess superior properties when compared to natural fiber reinforced composites, their high cost makes it unviable in day-to-day applications. This paper is an evaluation of a pineapple fiber reinforced composite using epoxy resin as matrix. Glass fibers are provided as the outer layers to improve the surface finish and strength. Using hand lay-up method, fibers of pineapple are assembled in alternate layers of vertical and horizontal orientation. The flexural properties of the composite are determined. Three samples are tested and it is seen that there is no appreciable variation in the properties. The average break load is 1.29 KN and the deflection is 5.533 mm. The flexural strength is calculated as 78.63MPa.

scholarly journals Efficient Improvement in Fracture Toughness of Laminated Composite by Interleaving Functionalized Nanofibers

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2509
Author(s):  
Seyed Mohammad Javad Razavi ◽  
Rasoul Esmaeely Neisiany ◽  
Moe Razavi ◽  
Afsaneh Fakhar ◽  
Vigneshwaran Shanmugam ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Fracture Behavior ◽  
Laminated Composite ◽  
Carbon Phase ◽  
Reinforced Composite ◽  
Reinforcing Agent ◽  
The Matrix ◽  
As Stress ◽  
Double Cantilever Beam Test ◽  
Pan Nanofiber

Functionalized polyacrylonitrile (PAN) nanofibers were used in the present investigation to enhance the fracture behavior of carbon epoxy composite in order to prevent delamination if any crack propagates in the resin rich area. The main intent of this investigation was to analyze the efficiency of PAN nanofiber as a reinforcing agent for the carbon fiber-based epoxy structural composite. The composites were fabricated with stacked unidirectional carbon fibers and the PAN powder was functionalized with glycidyl methacrylate (GMA) and then used as reinforcement. The fabricated composites’ fracture behavior was analyzed through a double cantilever beam test and the energy release rate of the composites was investigated. The neat PAN and functionalized PAN-reinforced samples had an 18% and a 50% increase in fracture energy, respectively, compared to the control composite. In addition, the samples reinforced with functionalized PAN nanofibers had 27% higher interlaminar strength compared to neat PAN-reinforced composite, implying more efficient stress transformation as well as stress distribution from the matrix phase (resin-rich area) to the reinforcement phase (carbon/phase) of the composites. The enhancement of fracture toughness provides an opportunity to alleviate the prevalent issues in laminated composites for structural operations and facilitate their adoption in industries for critical applications.

Molding Conditions and Mechanical Properties of Jute Fiber Reinforced Composite

2010 ◽  
Vol 452-453 ◽  
pp. 261-264 ◽  
Author(s):  
Kenichi Takemura
Keyword(s):  
Tensile Strength ◽  
Tensile Test ◽  
Tensile Properties ◽  
Jute Fiber ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Molding Temperature ◽  
High Fiber ◽  
Reinforced Composite ◽  
Molding Condition

In this study, molding condition and tensile properties of jute fiber reinforced composite were examined. PVA resin was used as matrix which is one of the biodegradable resin. Before tensile test, specimens have an offset twist. The tensile test after twist of jute fiber cloth was also conducted. As a result, following results were obtained. In the case of jute fiber cloth, the effect of twist deformation to tensile strength is not great. The reason is thought that the fiber cloth is flexible and easy to deform in this form. In the case of composite, molding time has an effect to the tensile properties. As the molding temperature increases, the tensile strength increases. So, the diffraction intensity was measured. The reason of effect to the strength is thought that the crystallization occurred in the matrix. When the molding temperature is so high, fiber has degradation, and the strength of the composite decreases. As the degree of twist increases, the strength decreases. The reasons are the delamination between layers and debonding between fiber and matrix.

Active thermography as a tool for internal composite structure observation and evaluation

2018 ◽  
Vol 9 (6) ◽  
pp. 779-792 ◽  
Author(s):  
Katarzyna Majewska ◽  
Magdalena Mieloszyk ◽  
Wieslaw Ostachowicz
Keyword(s):  
Research Work ◽  
Structural Condition ◽  
Original Research ◽  
Pulsed Thermography ◽  
Content Type ◽  
Three Samples ◽  
Structure Observation ◽  
Material Discontinuities ◽  
Excellent Tool ◽  
Composite Samples

Purpose The purpose of this paper is to study if it is possible applying infrared thermography (both vibro and pulsed) to detect and localise material discontinuities as well as to find the place where the inclusion was introduced. Design/methodology/approach The experimental investigation is performed on samples manufactured during infusion process. The measurements were performed on three four-layered rectangular composite samples with discontinuities. The discontinuities introduced in the samples were as follow: all three samples between first and second layer counting form the bottom two optical fibres (OFs) were embedded and additionally: sample no. 1 – one of the OF was broken, sample no. 2 – the drop of water was introduced, and sample no. 3 – the little amount of dust was introduced. Findings For some discontinuities, the vibrothermography is excellent tool (placement of broken OF, drop of water), for same is not sufficient (healthy OFs or dust). For dust, the pulsed thermography seems to be the required tool. Different approaches (vibrothermography and pulsed thermography) for the same sample will confirm that for same defects vibrothermograpy is better and for some pulsed thermography – complex combination of different thermography approaches is needed to have complex response about sample structural condition. Originality/value The presented paper is an original research work. There are very limited literature papers applying both vibro and pulsed thermography for one problem. The assessment of different discontinuities (inclusions) and detailed analysis is presented.

scholarly journals Mechanical Properties of Welt Knitted Fabric Reinforced Composites

1995 ◽  
Vol 4 (3) ◽  
pp. 096369359500400 ◽  
Author(s):  
Hiroyuki Hamada ◽  
Asami Nakai ◽  
Akihiro Fujita ◽  
Miyako Inoda
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Tensile Properties ◽  
Fracture Mode ◽  
Knitted Fabric ◽  
Reinforced Composites ◽  
Reinforced Composite ◽  
Plain Knitted Fabric ◽  
Knitted Structure

In this paper, welt knitted fabric reinforced composites were fabricated and its tensile properties were measured. Changing knitted structure from plain knit to welt knit caused changing mechanical properties, particularly isotropic tensile strength could be obtained. The fracture mode of welt knitted fabric reinforced composite was similar that of plain knitted fabric reinforced composite.

scholarly journals Water Absorption and Hygrothermal Aging Behavior of Wood-Polypropylene Composites

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 782 ◽  
Author(s):  
Wei Wang ◽  
Xiaomin Guo ◽  
Defang Zhao ◽  
Liu Liu ◽  
Ruiyun Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Natural Fiber ◽  
Glass Fibers ◽  
Diffusion Constant ◽  
Water Molecules ◽  
Wood Powder ◽  
Polypropylene Composites ◽  
Effect Of Water ◽  
Composite Samples

Environmentally sound composites reinforced with natural fibers or particles interest many researchers and engineers due to their great potential to substitute the traditional composites reinforced with glass fibers. However, the sensitivity of natural fiber-reinforced composites to water has limited their applications. In this paper, wood powder-reinforced polypropylene composites (WPCs) with various wood content were prepared and subjected to water absorption tests to study the water absorption procedure and the effect of water absorbed in the specimens on the mechanical properties. Water soaking tests were carried out by immersion of composite specimens in a container of distilled water maintained at three different temperatures, 23, 60 and 80 °C. The results showed that the moisture absorption content was related to wood powder percentage and they had a positive relationship. The transfer process of water molecules in the sample was found to follow the Fickian model and the diffusion constant increased with elevated water temperature. In addition, tensile and bending tests of both dry and wet composite samples were conducted and the results indicated that water absorbed in composite specimens degraded their mechanical properties. The tensile strength and modulus of the composites reinforced with 15, 30, 45 wt % wood powder decreased by 5.79%, 17.2%, 32.06% and 25.31%, 33.6%, 47.3% respectively, compared with their corresponding dry specimens. The flexural strength and modulus of the composite samples exhibited a similar result. Furthermore, dynamic mechanical analysis (DMA) also confirmed that the detrimental effect of water molecules on the composite specimens.

The crashworthiness performance of integrally woven sandwich composite panels made using natural and glass fibers

2020 ◽  
pp. 002199832096484
Author(s):  
Tohid Dastan ◽  
Aida Safian ◽  
Mohammad Sheikhzadeh
Keyword(s):  
Glass Fibers ◽  
Computational Cost ◽  
Sandwich Composite ◽  
Sandwich Composites ◽  
Green Composites ◽  
Compression Tests ◽  
Compression Load ◽  
Petroleum Resources ◽  
Cost Efficient ◽  
Composite Samples

As a way to save petroleum resources, considerable efforts were made in the last three decades to develop green composites. Green composites are a category of composite materials in which at least one phase (reinforcement or matrix) is made from renewable resources. An attempt was made to present a simple fabrication process to produce hollow integrally woven sandwich composites. In addition, the potential of jute fibers to be utilized as piles in the core of an integrally woven sandwich composite was assessed and compared to the counterparts made using glass fibers. The crashworthiness performances of integrally woven sandwich composite samples considering the effect of relative density, pile material and the presence of polyurethane foam were investigated through performing quasi-static flat-wise compression tests. Based on the findings, the foam-filled integrally woven sandwich composites exhibited stable compression load-displacement response and better energy absorption properties over pure foam, which make them appropriate for automobile interior components. Moreover, a computational cost-efficient finite element modeling was presented and subsequently validated with experimental results.

Sign in / Sign up

Export Citation Format

Share Document