scholarly journals Physicochemical and Mechanical Characterization of Raffia vinifera Pith

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
N. R. Sikame Tagne ◽  
T. E. Mbou ◽  
O. Harzallah ◽  
D. Ndapeu ◽  
W. Huisken ◽  
...  
Keyword(s):  
Natural Fibers ◽  
Tensile Tests ◽  
Effective Area ◽  
Bending Tests ◽  
Energy Dispersion Spectrometer ◽  
Eds Analysis ◽  
Matrix Properties ◽  
The Matrix ◽  
Imagej Software

In this paper, the physicochemical and mechanical properties of Raffia vinifera pith (RVP) are discussed. Microscopic observations have shown that the structure of the RVP is similar to that of a composite consisting of natural fibers. The effective area ratio of Raffia vinifera (RV) fibers was evaluated along the raffia stem using ImageJ software, and it decreases from the periphery to the center. Energy dispersion spectrometer (EDS) analysis shows that RVP is essentially composed of carbon and oxygen. Densities of RVP and its matrix were determined using Archimedes’ principle and law of mixtures, respectively; from the results obtained, they can be considered as one of the lightest materials. Young’s modulus of RVP has been obtained from tensile and bending tests, while that of matrix has been obtained using the law of mixtures during tensile tests. RVP has better specific properties, and the results of the matrix properties show that we can easily select another matrix which has better properties than the case studied during the elaboration of composites.

scholarly journals Synthesis and Characterization of Natural Fibers Reinforced Fiber Epoxy Composites

2015 ◽  
Vol 51 ◽  
pp. 47-53
Author(s):  
U. Mahaboob Basha ◽  
D. Mohana Krishnudu ◽  
P. Hussain ◽  
K. Manohar Reddy ◽  
N. Karthikeyan ◽  
...  
Keyword(s):  
Room Temperature ◽  
Natural Fibers ◽  
Epoxy Composites ◽  
Synthesis And Characterization ◽  
Mechanical And Thermal Properties ◽  
Epoxy System ◽  
Pennisetum Typhoides ◽  
The Matrix ◽  
Reinforced Fiber

In the current work epoxy resin is chosen as matrix, treated Sacharum offinarum ( SugarCane) fiber, Pennisetum typhoides (Jowar)/ Fillet miller (Ragi) filler are chosen as reinforcement. Room temperature cured Epoxy System filled with Sacharum offinarum fiber and Pennisetum typhoides (Jowar)/ Fillet miller (Ragi) filler are synthesised by mechanical shear mixer, then kept in a Ultra sonic Sonicator for better dispersion of Pennisetum typhoides (Jowar)/ Fillet miller (Ragi) filler in the matrix. Different weights of modified Pennisetum typhoides (Jowar)/ Fillet miller (Ragi) filler (1,2,3,4,5 gm wt) has been incorporated into the Epoxy matrix in order to study the variation of Mechanical and Thermal properties.

scholarly journals Effect of addition of different reinforcements on the microstructure and mechanical characterization of the Al-Flyash composites

2021 ◽  
Vol 15 (56) ◽  
pp. 217-228
Author(s):  
Milind K. Wasekar ◽  
Mohan P. Khond
Keyword(s):  
Tensile Strength ◽  
Hybrid Composites ◽  
Tensile Tests ◽  
Stir Casting ◽  
Interface Bonding ◽  
Casting Technique ◽  
Testing Procedures ◽  
The Matrix ◽  
Aluminum 6061 Alloy

The aim of this work is to investigate the influence of the addition of silicon carbide and molybdenum disulfide on the microstructure and the tensile strength of the Al-Flyash hybrid composites prepared using the stir casting technique. The composite with aluminum 6061 alloy as the matrix and flyash as the reinforcement, with different weight fractions, is investigated to study its microstructure and the tensile strength. The same has been compared with the hybrid composites with Aluminum-Flyash/SiC and Aluminum-Flyash/MoS2 for different weight fractions of the reinforcements. The tensile tests were conducted as per ASTM standard testing procedures at room temperature. From the results it is identified that tensile strength of the Al6061-Flyash composite is lesser than the Al6061-Flyash/SiC and Al6061-Flyash/MoS2 hybrid composites. It is also observed that increment in the composition of the SiC and MoS2 causes the increment in the tensile strength of the hybrid composite. This increment in the tensile strength is due to good interface bonding and uniform distribution of the reinforcements in the composite.

Composite materials derived from biodegradable starch polymer and Atriplex halimus fibers

e-Polymers ◽  
2015 ◽  
Vol 15 (6) ◽  
pp. 419-426 ◽  
Author(s):  
Hayet Latifa Boudjema ◽  
Hayet Bendaikha
Keyword(s):  
Corn Starch ◽  
Natural Fibers ◽  
Cellulose Fibers ◽  
Tensile Tests ◽  
Thermoplastic Starch ◽  
Atriplex Halimus ◽  
The Matrix ◽  
Environmentally Safe ◽  
Solution Casting Method ◽  
Mechanical Tensile

AbstractBiocomposites from starch and cellulose fibers have gained renewed interest as environmentally friendly materials and as biodegradable renewable resources for a sustainable development. In this study, natural fibers were extracted from a Mediterranean saltbush (Atriplex halimus) plant found abundantly in North Africa. The composites were prepared by a solution casting method from corn starch using 0–15 wt.% of micro-cellulose fibers as a filler. The structure of the composites was investigated by Fourier transform infrared spectroscopy. The physical properties of the composites were determined by mechanical tensile tests, thermogravimetric analysis and water absorption. The results showed that higher fiber content raised the elastic modulus by 92% and the temperature of degradation by up to 355°C. Optical microscopy revealed a good adhesion between the matrix and the fibers owing to their chemical similarities. Water uptake measurements showed that the composites had a much better water resistance and a more hydrophobic character than pure thermoplastic starch films. Biodegradability tests confirmed that the prepared composites are an environmentally safe material suited for different applications.

An Alternative Approach for FRCM Matrix Tensile Strength Evaluation

2019 ◽  
Vol 817 ◽  
pp. 365-370 ◽  
Author(s):  
Alessandro Bellini ◽  
Marco Bovo ◽  
Andrea Incerti ◽  
Claudio Mazzotti
Keyword(s):  
Tensile Strength ◽  
High Performance ◽  
Mechanical Characterization ◽  
Experimental Tests ◽  
Tensile Tests ◽  
Test Methods ◽  
Test Method ◽  
The Matrix ◽  
Flexural Tests

Structural retrofitting with composite materials proved to be an effective technique for rehabilitation of degraded or damaged masonry and concrete buildings. Nowadays, Fiber Reinforced Cementitious Matrix (FRCM) composites are widely used as externally bonded strengthening systems thanks to their high performance, low weight and easiness of installation. Several experimental tests and numerical studies are currently available concerning the tensile and bond behavior of FRCM systems, but a debated and still open issue concerns the methods for the mechanical characterization of the mortar used as matrix within the strengthening system. The present paper analyses and compares different test methods for determining the matrix tensile strength. Pure tensile and flexural tests have been carried out on different mortar matrix samples. In order to evaluate which is the most suitable value to be considered for a correct interpretation and modeling of the composite system, the experimental results obtained through flexural tests on standard mortar specimens have been compared with the outcomes obtained from direct tensile tests on FRCM coupons. The present study represents only a first step for the definition of the most appropriate test method for the mechanical characterization of the matrix used within FRCM strengthening systems.

scholarly journals Manufacture of student chair in composite material reinforced with fique fiber

2021 ◽  
Vol 26 (1) ◽  
pp. 6-13
Author(s):  
Sergio Andrés Gómez ◽  
Edwin Cordoba ◽  
Christian Vega Mesa ◽  
Sergio Gómez Becerra
Keyword(s):  
Composite Material ◽  
Polyester Resin ◽  
Natural Fibers ◽  
Environmental Damage ◽  
Good Adhesion ◽  
Sustainable Products ◽  
Reinforced Composite ◽  
The Matrix ◽  
Reinforced Composite Material

The use of natural fibers as reinforcement for composite materials is on the rise due to the need to reduce environmental damage and manufacture sustainable products. One of the fibers used for this purpose is fique fiber. This article describes the manufacture of a student chair with fique fiber-reinforced composite material. To choose the amount of reinforcement to be used in the elaboration of the chair, the mechanical characterization of several composites with different percentages of the fiber was carried out, where it was found that both the flexural and tensile properties increased with a higher insertion of fique. The selected material was analyzed morphologically with optical microscopy, finding that there was good adhesion between the fiber and the matrix. A simulation with finite elements showed that the chair would resist a load of 100 kg. The student chair was manufactured using the Hand Lay Up technique with material composed of fique fiber and polyester resin.

scholarly journals Characterization of Titanium Metal Matrix Composites (Ti-MMC) Made Using Different Manufacturing Routes

2021 ◽  
Author(s):  
Luigi Sanguigno ◽  
Marcello Antonio Lepore ◽  
Angelo Rosario Maligno
Keyword(s):  
Composite Laminates ◽  
Metal Matrix ◽  
Mechanical Performance ◽  
Tensile Tests ◽  
Morphological Properties ◽  
Elastic Behaviour ◽  
Matrix Composites ◽  
Micromechanical Modelling ◽  
The Matrix

The mechanical and morphological properties of the unidirectional metal matrix composite (MMC) in titanium alloy reinforced with continuous silicon carbide (SiC) fibres are investigated. The lay-up manufacturing process known as the Foil / Fibre (FF) lay-up was compared with the matrix-coated-fibre (CF) method which promises a better final shape of the reinforcing fibre net. Tensile tests were performed to measure mechanical performance of the manufactured MMCs both longitudinally and transversely respect to the direction of SiC fibres. Elastic behaviour of the investigated MMCs was assumed orthotropic and related to mechanical properties and spatial distribution of the MMC constituents: SiC fibres and Titanium (Ti) matrix. This was achieved using micromechanical modelling based on Finite Element (FE) calculations. FE micromechanical modelling was carried out on the Representative Elementary Volume (REV) of the MMC microstructure resolved by non-destructive analysis such as X-Ray tomography. The analysis carried out highlighted and justified mechanical performance difference between composite laminates containing the same amount of SiC reinforcement fibres for unit of volume but made following different manufacturing routes. To compute overall orthotropic behaviour of the MMC laminate, each constituent was assumed as an elastic isotropic heterogeneity during the averaging. This simplify assumption was validated by comparison with experimental data during the mechanical characterization of the investigated MMC composites.

Modeling and Characterization of Strain Sensing in CNT-Based Polymer Composites Under Tensile Loading

2012 ◽  
Author(s):  
Yu Kuronuma ◽  
Tomo Takeda ◽  
Yasuhide Shindo ◽  
Fumio Narita ◽  
Zhijuan Wei
Keyword(s):  
Polymer Composites ◽  
Electrical Resistance ◽  
Matrix Material ◽  
Tensile Loading ◽  
Tensile Tests ◽  
Tunneling Effect ◽  
Strain Sensing ◽  
Resistance Change ◽  
The Matrix

This paper presents a study on the strain sensing behavior of carbon nanotube (CNT)-based polymer composites subjected to tensile loading. Tensile tests were performed on CNT/polycarbonate composites and the responses in strain and electrical resistance were measured during the tests. An analytical model incorporating the electrical tunneling effect due to the matrix material between CNTs was also developed to predict the electrical resistance change resulted from deformation. The analytical predictions were compared with the experimental data.

Mechanical Properties of 91% Tungsten Alloy

2007 ◽  
Vol 345-346 ◽  
pp. 1625-1628 ◽  
Author(s):  
Wei Dong Song ◽  
Hai Yan Liu ◽  
Jian Guo Ning
Keyword(s):  
Crack Initiation ◽  
Tensile Tests ◽  
Tungsten Alloy ◽  
Test Results ◽  
Bending Tests ◽  
Three Point Bending ◽  
Grain Sizes ◽  
Initiation And Propagation ◽  
Fracture Behaviors ◽  
The Matrix

The tensile tests and the three-point bending tests have been conducted to investigate the crack initiation and propagation and the fracture behavior of 91W-6.3Ni-2.7Fe with three kinds grain sizes of 1~3μm, 10~15μm and 30~40μm. SEM was introduced to analyze the grain sizes, the micro-defects, the deformations and the fracture behaviors of tungsten alloys. The test results show that under the same loading conditions, the crack initiation and the crack propagation are not only related to grain size, but also related to the contiguity of tungsten grains and the interface between the tungsten grains and the matrix.

scholarly journals Development and Multiscale Characterization of 3D Warp Interlock Flax Fabrics with Different Woven Architectures for Composite Applications

Fibers ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 15 ◽  
Author(s):  
Henri Lansiaux ◽  
Damien Soulat ◽  
François Boussu ◽  
Ahmad Rashed Labanieh
Keyword(s):  
Mechanical Properties ◽  
Natural Fibers ◽  
Three Dimensional ◽  
Tensile Tests ◽  
Woven Fabrics ◽  
Flax Fiber ◽  
Raw Material ◽  
Mechanical Tensile

Multiscale characterization of the textile preform made of natural fibers is an indispensable way to understand and assess the mechanical properties and behavior of composite. In this study, a multiscale experimental characterization is performed on three-dimensional (3D) warp interlock woven fabrics made of flax fiber on the fiber (micro), roving (meso), and fabric (macro) scales. The mechanical tensile properties of the flax fiber were determined by using the impregnated fiber bundle test. The effect of the twist was considered in the back-calculation of the fiber stiffness to reveal the calculation limits of the rule of mixture. Tensile tests on dry rovings were carried out while considering different twist levels to determine the optimal amount of twist required to weave the flax roving into a 3D warp interlock. Finally, at fabric-scale, six different 3D warp interlock architectures were woven to understand the role of the architecture of binding rovings on the mechanical properties of the dry 3D fabric. The results reveal the importance of considering the properties of the fiber and roving at these scales to determine the more adequate raw material for weaving. Further, the characterization of the 3D woven structures shows the preponderant role of the binding roving on their structural and mechanical properties.

Bending Mechanical Behavior of Epoxy Matrix Reinforced with Jute Fiber

2014 ◽  
Vol 775-776 ◽  
pp. 314-318 ◽  
Author(s):  
Sergio Neves Monteiro ◽  
Frederico Muylaert Margem ◽  
Isabela Leão Amaral da Silva ◽  
Alice Bevitori ◽  
Michel Picanço Oliveira
Keyword(s):  
Mechanical Behavior ◽  
Tensile Properties ◽  
Epoxy Matrix ◽  
Natural Fibers ◽  
Tensile Tests ◽  
Entire Length ◽  
Jute Fiber ◽  
Matrix Composites ◽  
Bending Tests ◽  
Astm Standard

Environmentally correct composites, made from natural fibers, are among the most investigated and applied materials today. In this paper, the mechanical behavior of epoxy matrix composites reinforced with continuous jute fiber was investigated through bending tensile tests. Specimens containing 0, 10, 20 and 30% in volume of jute fiber were aligned along the entire length of a mold to create plates of these composites. Those plates were cut following the ASTM standard to obtained bending tests specimens. The test was conducted in an Instron machine and the fractured specimens were analyzed by SEM. The results showed an increase in the materials tensile properties with the increase of fiber amount.

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