Stability of GFRP composites with varied fractions of reinforcement exposed to ageing processes outdoors

2020 ◽  
pp. 096739112097350
Author(s):  
S Beura ◽  
SR Sahoo ◽  
DN Thatoi ◽  
UK Mohanty ◽  
AP Chakraverty
Keyword(s):  
Weight Fraction ◽  
Interfacial Area ◽  
Sem Analysis ◽  
Gfrp Composites ◽  
Weight Percentage ◽  
Highest Weight ◽  
Reinforced Plastic ◽  
Glass Fibre Reinforced Plastic ◽  
Glass Fibre Reinforced ◽  
Interlaminar Shear

The effects of outdoor ageing on various compositions of glass fibre reinforced plastic (GFRP) composites were studied. Changes in the interlaminar shear strength (ILSS) of hand-laid samples with 50–60 wt.% of fibre were determined by three-point bending and glass transition temperature (Tg) measurements. SEM analysis was carried out for exploring the mode of failure. The moisture ingress rate and extent were concentration-dependent at first, but became increasingly dependent on the fibre-matrix interfacial area. The ILSS initially fluctuated and then showed a decreasing trend with time, especially for the higher fibre concentrations. ILSS variations were zigzag initially and showed a lowering trend after the initial periods. Rate of lowering of ILSS was the highest for samples with the highest fraction reinforcement. Weight fraction reinforcement didn’t have any significant effect on the Tg variations. SEM fractograph revealed excessive fracture and fragmentation for the composite samples with the highest weight percentage reinforcement.

scholarly journals Wear Characterisitcs of Nano-Particle Filled GFRP Composites

2010 ◽  
Vol 19 (1) ◽  
pp. 096369351001900 ◽  
Author(s):  
V. Srinivasan ◽  
R. Karthikeyan ◽  
N.Mohamad Raffi ◽  
G. Ganesan
Keyword(s):  
Volume Fraction ◽  
Nano Particle ◽  
Sliding Velocity ◽  
Gfrp Composites ◽  
Tribological Behaviour ◽  
Reinforced Plastic ◽  
Nano Alumina ◽  
Glass Fibre Reinforced Plastic ◽  
Glass Fibre Reinforced ◽  
Wear Maps

In the recent years, the growth of glass fibre reinforced plastic (GFRP) is significantly higher than that of steel. In this study, the GFRP filled with 1 & 2% volume fraction of nano Alumina (Al2O3) particles were tested for their tribological behaviour. The wear maps were utilized to study the influence of control parameters like sliding velocity and normal force over the responses like coefficient of friction, contact temperature and wear rate. The micrographs of the worn out specimen showed the dominance of a particular wear mechanism in each sliding conditions.

Impact of the ambiance on GFRP composites and role of some inherent factors: A review report

2018 ◽  
Vol 37 (8) ◽  
pp. 533-547 ◽  
Author(s):  
S Beura ◽  
DN Thatoi ◽  
AP Chakraverty ◽  
UK Mohanty
Keyword(s):  
Composite Material ◽  
Service Life ◽  
Volume Fraction ◽  
Present Report ◽  
Ambient Conditions ◽  
Gfrp Composites ◽  
Reinforced Plastic ◽  
The Matrix ◽  
Glass Fibre Reinforced Plastic ◽  
Glass Fibre Reinforced

A composite material scores over its metallic counter parts in many aspects and can be tailor-made to suit the specific purpose for which it is conceived. However, during functioning the composite is exposed to the severities of the surrounding ambiance and is damaged and degraded by the atmospheric deterrent-reagents like moisture and heat fluctuations. In order to ensure a safe, extended service life-span of the composite material, it is, therefore, pertinent that the behaviour of the material related to its physical, chemical and mechanical characteristics must be analysed and established under different fluctuating ambient conditions. The present report aims at analysing and presenting the degradation/damages caused to the glass-fibre reinforced plastic (GFRP) composites under different ambient conditions and the role played by some inherent factors like the constituent components of the GFRP composites, its pre-existing flaws created during manufacturing/service-life, volume fraction fibres, length and distribution of the fibres in the matrix phase and the curing processes adopted for strengthening and stabilising the matrix structure.

Reduction of AWJ Induced Delaminations by Impregnated Nanoclay GFRP Composites

2019 ◽  
Vol 969 ◽  
pp. 284-290
Author(s):  
V.V. Subba Rao ◽  
Godavarthi Yeswanth Kiran Kumar ◽  
Sansanka Pentapalli
Keyword(s):  
Mechanical Properties ◽  
Research Work ◽  
Physical And Mechanical Properties ◽  
Weight Fraction ◽  
Sem Analysis ◽  
Machining Parameters ◽  
Gfrp Composites ◽  
Industrial Sectors ◽  
Nano Clay ◽  
Glass Fibre Reinforced

Composite materials are extensively used in various applications like space, aircraft, and automobile sector because of superior physical and mechanical properties even though they are costly. In recent technological innovations, using Montmorillonite (Nanoclay) to reinforce polymer-based composites has raised attention to academic and industrial sectors since small addition could enhance Mechanical properties thereby decreasing failures like delaminations. In present research work, the effect of AWJ machining parameters on delaminations of glass fibre reinforced epoxy composite is investigated. The Main objective is determining delamination factor and reduce delaminations which is major failure in laminates. This paper investigates on effects of impregnated Nanoclay epoxy in Bi-directional GFRP where previous research has been made only in changing the parameters for reduction of delaminations. The samples were machined using AWJ, delamination factors are measured using image-J software and SEM analysis for comparing micrographs. Finally with increase in nano clay weight fraction, delaminations are checked.

scholarly journals Seawater effects on static loads and interlayer cracking performance for polyvinyl chloride foam-cored sandwich composites

2018 ◽  
Vol 10 (11) ◽  
pp. 168781401880734
Author(s):  
Jian He ◽  
Dongyuan Xie ◽  
Qichao Xue ◽  
Yangyang Zhan
Keyword(s):  
Energy Release ◽  
Polyvinyl Chloride ◽  
Glass Fibre ◽  
Critical Energy ◽  
Bending Tests ◽  
Rate Dependent ◽  
Reinforced Plastic ◽  
Glass Fibre Reinforced Plastic ◽  
Glass Fibre Reinforced ◽  
Cantilever Bending

The diffusion influence of seawater on the static and interlayer cracking properties of a polyvinyl chloride foam sandwich structure is investigated in this study. After soaking specimens in seawater for various durations, various comparison tests are performed to investigate the effects of seawater. Compression tests for H60 and H200 polyvinyl chloride foam specimens are conducted to study strength and modulus degradation, and the results show that immerging time and temperature have significant effects on polyvinyl chloride foam properties. Tensile tests for glass-fibre-reinforced plastic panels, four-point bending tests and double cantilever bending tests for polyvinyl chloride foam sandwich specimens are also performed. The results show that seawater immerging treatment has a noticeable influence on glass-fibre-reinforced plastic tensile properties and interlayer critical energy release rate values, but has almost no effect on bending properties of foam sandwich specimen. Furthermore, a rate-dependent phenomenon is observed in double cantilever bending tests, in which higher loading rate will lead to larger critical energy release values. Numerical simulation is also performed to illustrate the cracking process of double cantilever bending tests and shows a certain accuracy. The simulation also demonstrates that the viscoelasticity of foam material after immerging treatment results in the rate-dependent characterization of double cantilever bending tests.

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