Effect of Fibre Volume Fraction on Tensile Fatigue Behaviour of UD Glass/Epoxy Composite

1989 ◽  
pp. 451-456
Author(s):  
I. Partridge ◽  
P. Virlouvet ◽  
J. Chubb ◽  
P. Curtis
Keyword(s):  
Volume Fraction ◽  
Epoxy Composite ◽  
Fibre Volume Fraction ◽  
Fatigue Behaviour ◽  
Fibre Volume ◽  
Tensile Fatigue

The environmental fatigue behaviour of reinforced plastics

1984 ◽  
Vol 396 (1811) ◽  
pp. 315-338 ◽  
Keyword(s):  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Aromatic Polyamide ◽  
Fatigue Behaviour ◽  
Fatigue Tests ◽  
Fibre Volume ◽  
Boiling Water ◽  
Reinforced Plastics ◽  
Reinforced Plastic ◽  
Tensile Fatigue

This paper presents the results of an investigation of the effects of hygrothermal conditioning on the mechanical properties and fatigue behaviour of epoxy-based composites reinforced with carbon, glass and aromatic polyamide fibres. Cross-plied (0°/90°) laminates of these materials, of nominal fibre volume fraction ca . 0.6, were conditioned by drying, by exposing to a 65% r. h. (relative humidity) atmosphere and by boiling in water. The effects of these treatments on the tensile and shear strengths and on the tensile fatigue response of the laminates when tested orthogonally and at ±45° to the fibre lay-up are discussed. The 0°/90° tensile properties of the three laminates are relatively little affected by the conditioning treatments except for g. r. p. (glass reinforced plastic) exposed to boiling water, and of K. f. r. p. (Kevlar fibre reinforced plastic) in which the strength is reduced somewhat by complete drying. The shear strengths and ±45° tensile strengths are more sensitive to the effects of moisture, however, and it appears that optimum strengths are developed after conditioning at the intermediate 65% r. h. Tensile fatigue tests have been carried out on laminates in the 0°/90° and ±45° orientations. In c. f. r. p. (carbon fibre reinforced plastic) there is no effect of conditioning on the fatigue behaviour of 0°/90° samples, and in g. r. p. only the boiling water treatment affects the results. Preloading g. r. p. samples before conditioning has no effect on their fatigue behaviour. The tensile fatigue resistance of 0°/90° Kevlar-epoxy laminates is reduced by drying more than by boiling, and in all conditions the stress against logarithm of life curves are characterized by a downward curvature that renders the long term stability of this material suspect. This behaviour is also reflected in differences in the ±45° tensile fatigue response of the three laminates.

scholarly journals Manufacturing of E-Glass/Epoxy Composite LSU-03 Propeller Using Hand Lay-up Method

AVIA ◽  
2021 ◽  
Vol 2 (2) ◽  
Author(s):  
A Z Dwi ◽  
H Syamsudin
Keyword(s):  
Mass Balance ◽  
Volume Fraction ◽  
Epoxy Composite ◽  
Low Cost ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Small Companies ◽  
Balance Point ◽  
Product Compatibility

Hand lay-up method is frequently used by small companies. It is due to its flexibility and low-cost considerations. One of the qualities problems that normally arises is the product unevenness. This study was carried out to analyse this variation on manufacturing E-glass/epoxy plates specimen and propeller product. Void and fibre volume fraction of manufactured plates are measured based on ASTM-D2734. Propellers of LSU-03 aircraft were manufactured and analysed to find out the uniformity of the product in terms of its mass and size. To determine product compatibility with the design, the geometry and the thickness were measured at several points of propeller. In addition to this, a balancing process is carried out to find out the mass balance point.

Effect of fibre volume fraction on the fatigue behaviour of GRP pultruded rod composites

1996 ◽  
Vol 56 (1) ◽  
pp. 23-29 ◽  
Author(s):  
M.H.Abd Allah ◽  
Enayat M. Abdin ◽  
A.I. Selmy ◽  
U.A. Khashaba
Keyword(s):  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Fatigue Behaviour ◽  
Fibre Volume

scholarly journals The Effects of Fibre Volume Fraction on a Glass-Epoxy Composite Material

2015 ◽  
Vol 7 (3) ◽  
pp. 113-119 ◽  
Author(s):  
LARCO Ciprian ◽  
◽  
PAHONIE Radu ◽  
EDU Ioana ◽  
◽  
...  
Keyword(s):  
Composite Material ◽  
Volume Fraction ◽  
Epoxy Composite ◽  
Fibre Volume Fraction ◽  
Fibre Volume

Characterisation and modelling of thermal expansion coefficient of woven carbon/epoxy composite and its application to the determination of spring-in

2016 ◽  
Vol 51 (11) ◽  
pp. 1527-1538 ◽  
Author(s):  
Yasir Nawab ◽  
Camille Sonnenfeld ◽  
Abdelghani Saouab ◽  
Romain Agogué ◽  
Pierre Beauchêne
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Thermal Expansion ◽  
Volume Fraction ◽  
Epoxy Composite ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Woven Composites ◽  
Thermal Gradients ◽  
Experimental Values

Properties of resin and composite, especially anisotropic coefficients of thermal expansion, are very crucial to precisely determine residual stress generated in a composite part. No comprehensive study is available in the literature to determine these properties for woven composites and then its application to model residual stress in woven carbon epoxy composite parts. In the present article, experimental results on thermal coefficients of RTM6 epoxy resin as well carbon/epoxy woven composites obtained using different experimental techniques are compared with homogenised coefficients of thermal expansion results. Evolution of spring-in angle of L-shaped carbon/epoxy woven composite (during and after cure) with three different thicknesses is modelled by simultaneously solving the thermal-kinetics and thermal-chemical-mechanics coupling by using finite element code COMSOL Multiphysics. Objective was to quantify the contribution of curing and cooling to the formation of residual stress. Anisotropic properties of composite, during and after cure, required for numerical simulation are obtained using an analytical method. Variation in properties with degree of cure and thermal gradients induced in the part during fabrication are considered while modelling. Modelled properties of cured composites were compared with experimental values and were found in agreement. The spring-in angle values obtained by numerical simulation are compared with the results of the analytical model as well as experiments. Effect of variation of fibre volume fraction and presence of thermal gradients on spring-in was studied as well.

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.

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