scholarly journals The Use of Low Pressure Compression in Resin Transfer Moulding to Enhance the Fibre Volume Fraction of Composite Materials

1999 ◽  
Vol 8 (6) ◽  
pp. 096369359900800
Author(s):  
Scott McGovern ◽  
P.-Y. Ben Jar
Keyword(s):  
Electron Microscopy ◽  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Low Pressure ◽  
Fibre Volume ◽  
Resin Transfer Moulding ◽  
Resin Injection ◽  
Glass Fibre Reinforced ◽  
Transfer Moulding ◽  
Scanning Electron

A low-pressure compression was applied after complete resin injection in the manufacture of resin transfer moulded (RTM) glass-fibre-reinforced laminates. Representative laminates were produced and their fibre volume fraction's ( Vf's) compared with that of laminates manufactured under conventional vacuum-driven RTM. The intralaminar and overall Vf's were examined from images generated through scanning electron microscopy (SEM), and each manufacturing process was compared for its ability to produce uniform high Vf composites.

Applying Computational Analysis in Studies of Resin Transfer Moulding

2012 ◽  
Vol 326-328 ◽  
pp. 158-163 ◽  
Author(s):  
F. Ferreira Luz ◽  
Sandro Campos Amico ◽  
A. de Lima Cunha ◽  
E.Santos Barbosa ◽  
Antônio Gilson Barbosa de Lima
Keyword(s):  
Porous Media ◽  
Computational Analysis ◽  
Volume Fraction ◽  
Numerical Study ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Fibre Reinforcement ◽  
Resin Transfer Moulding ◽  
Advanced Composite Materials ◽  
Transfer Moulding

Resin Transfer Moulding (RTM) as it is most known process in the Resin Injections family, is an extensively studied and used processing method. This process is used to manufacture advanced composite materials made of fibres embedded in a thermoset polymer matrix. Fibre reinforcement in RTM processing of polymer composites is considered as a fibrous porous medium regarding its infiltration by the polymer resin. In this sense, the present work aims the computational analysis of a fluid in a porous media for a RTM composite moulding by using the ANSYS CFX® commercial software. In order to validate the numerical study of the fluid flow in a known RTM system, experiments was carried out in laboratory to characterize the fluid (vegetal oil) flowing into the porous media (0/90 glass fibre woven), were pressure and fibre volume fraction have been fixed. The numerical simulation provides information about volume fraction, pressure and velocity distribution of the phases (resin and air) inside the porous media. The predicted results were compared with the experimental data and its has shown a solid relationship between them.

Fabrication of SiC Fibre Reinforced MoSi2 Based Composites by Low Pressure Plasm a Spraying

2000 ◽  
Author(s):  
K.H. Baik ◽  
P.S. Grant ◽  
A.R. Bhatti ◽  
R.A. Shatwell
Keyword(s):  
Residual Stresses ◽  
Volume Fraction ◽  
Design Method ◽  
Fibre Volume Fraction ◽  
Deposition Efficiency ◽  
Low Pressure ◽  
Fibre Volume ◽  
Matrix Cracking ◽  
Experimental Design Method ◽  
Cte Mismatch

Abstract SiC fibre reinforced SiAlON-MoSi2 composites have been manufactured by concurrent fibre winding and low pressure plasma spraying (LPPS), producing multi-layer, circumferentially fibre-reinforced composite rings. LPPS parameters for the powder used were optimised by a two-level experimental design method followed by additional tuning, achieving smooth sprayed surfaces with low matrix porosity and good deposition efficiency. The microstructure of the SiAlON-MoSi2 matrix consisted of a lamellar structure and uniformly distributed SiAlON splats throughout the MoSi2 matrix. The spray/wind composites exhibited 2% porosity and well controlled fibre distribution. Matrix cracking occurred after heat treatment at 1500°C and was attributed to the development of large tensile residual stresses during cooling due to CTE mismatch. Increasing the SiAlON to MoSi2 ratio in the composite solved the problem. Simulations based on residual stresses showed that the maximum permissible fibre volume fraction to avoid matrix cracking was 0.06 for SiC/MoSi2 and 0.23 for SiC/SiAlON(40v/o)-MoSi2.

Impact of Processing Parameters and Tapering of Injection Chamber Walls in Resin Injection Pultrusion

2007 ◽  
Vol 15 (7) ◽  
pp. 507-519 ◽  
Author(s):  
A.L. Jeswani ◽  
J.A. Roux
Keyword(s):  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Injection Pressure ◽  
Processing Parameters ◽  
Fibre Volume ◽  
Fibre Reinforcement ◽  
Resin Injection ◽  
Resin Injection Pultrusion ◽  
The Impact

This study seeks to improve the wet-out and thus the quality of the pultruded part in the tapered injection pultrusion process. Complete wet-out of the dry fibre reinforcement by the liquid resin depends strongly on the processing parameters. Process parameters modelled were: fibre pull speed, fibre volume fraction and resin viscosity. In this work a 3-D finite volume technique was developed to simulate the flow of polyester resin through the glass rovings. The results show the impact of the tapering of the injection chamber walls on the minimum injection pressure necessary to achieve complete fibre matrix wet-out and the resin pressure at the injection chamber exit. Important chamber design information is presented.

Effect of fibre content on the mechanical properties of hemp fibre woven fabrics/polypropylene composite laminates

2021 ◽  
pp. 096739112110239
Author(s):  
Sheedev Antony ◽  
Abel Cherouat ◽  
Guillaume Montay
Keyword(s):  
Mechanical Properties ◽  
Polymer Matrix ◽  
Composite Laminates ◽  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Woven Fabrics ◽  
Fibre Content ◽  
Viscoelastic Behaviour ◽  
Hemp Fibre

Nowadays natural fibre composites have gained great significance as reinforcements in polymer matrix composites. Composite material based on a polymer matrix reinforced with natural fibres is extensively used in industry due to their biodegradability, recyclability, low density and high specific properties. A study has been carried out here to investigate the fibre volume fraction effect of hemp fibre woven fabrics/PolyPropylene (PP) composite laminates on the tensile properties and impact hammer impact test. Initially, composite sheets were fabricated by the thermal-compression process with desired number of fabric layers to obtain composite laminates with different fibre volume fraction. Uniaxial, shear and biaxial tensile tests were performed and mechanical properties were calculated. Impact hammer test was also carried out to estimate the frequency and damping parameters of stratified composite plates. Scanning Electron Microscope (SEM) analysis was performed to observe the matrix and fibre constituent defects. Hemp fabrics/PP composite laminates exhibits viscoelastic behaviour and as the fibre volume fraction increases, the viscoelastic behaviour decreases to elastic behaviour. Due to this, the tensile strength increases as the fibre content increases. On the other hand, the natural frequency increases and damping ratio decrease as the fibre volume fraction increases.

scholarly journals Insulation Characteristics of Sisal Fibre/Epoxy Composites

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
A. Shalwan ◽  
M. Alajmi ◽  
A. Alajmi
Keyword(s):  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Thermal Characteristics ◽  
Fibre Volume ◽  
Point Of View ◽  
Natural Fibres ◽  
Epoxy Composites ◽  
Ongoing Research ◽  
Sisal Fibre ◽  
The Impact

Using natural fibres in civil engineering is the aim of many industrial and academics sectors to overcome the impact of synthetic fibres on environments. One of the potential applications of natural fibres composites is to be implemented in insulation components. Thermal behaviour of polymer composites based on natural fibres is recent ongoing research. In this article, thermal characteristics of sisal fibre reinforced epoxy composites are evaluated for treated and untreated fibres considering different volume fractions of 0–30%. The results revealed that the increase in the fibre volume fraction increased the insulation performance of the composites for both treated and untreated fibres. More than 200% insulation rate was achieved at the volume fraction of 20% of treated sisal fibres. Untreated fibres showed about 400% insulation rate; however, it is not recommended to use untreated fibres from mechanical point of view. The results indicated that there is potential of using the developed composites for insulation purposes.

New Development of Cattail Fibre in Composite Uses

2013 ◽  
Vol 746 ◽  
pp. 385-389
Author(s):  
Li Yan Liu ◽  
Yu Ping Chen ◽  
Jing Zhu
Keyword(s):  
Mechanical Properties ◽  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Environmental Benefits ◽  
Bending Properties ◽  
New Development ◽  
Original Plant ◽  
Reinforcing Material ◽  
Pp Composites

This paper is aiming to develop the cattail fibre as reinforcing material due to its environmental benefits and excellent physical and insulated characteristics. The current work is concerned with the development of the technical fibres from the original plant and research on their reinforcing properties in the innovative composites. Polypropylene (PP) fibre was used as matrix in this research which was fabricated into fibre mats with cattail fibre together with different fibre volume fractions. Cattail fibre reinforced PP laminates were manufactured and compared with jute/PP composites. The tensile and bending properties of laminates were tested. The SEM micrographs of fracture surface of the laminates were analyzed as well. The results reveal that the tensile and bending properties of cattail/PP laminates are closed to those of jute/PP composites. The mechanical properties of cattail/jute/PP laminates with fibre volume fraction of 20/35/45 is betther than those of laminate reinforced with cattail fibers.

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