The measurement of elastic modulus degradation on random glass fibre-reinforced polyester composites using ultrasonic testing pulse-echo method

2020 ◽  
Author(s):  
Firmansyah Sasmita ◽  
Hermawan Judawisastra ◽  
Ilham Nurhamidi ◽  
Dedi Alfian
Keyword(s):  
Elastic Modulus ◽  
Glass Fibre ◽  
Ultrasonic Testing ◽  
Glass Fibre Reinforced ◽  
Elastic Modulus Degradation ◽  
Polyester Composites ◽  
Pulse Echo ◽  
Pulse Echo Method

scholarly journals Machinability Study of Hybrid Nanoclay-Glass Fibre Reinforced Polyester Composites

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
P. Prabhu ◽  
P. Jawahar ◽  
M. Balasubramanian ◽  
T. P. Mohan
Keyword(s):  
Tool Wear ◽  
Glass Fibre ◽  
Microstructural Analysis ◽  
Process Parameter ◽  
Optimum Process ◽  
Machining Parameters ◽  
Twist Drill ◽  
End Mill ◽  
Glass Fibre Reinforced ◽  
Polyester Composites

Glass fibre reinforced polyester composites (GRP) and hybrid nanoclay and glass fibre reinforced polyester nanocomposites (CGRP) are fabricated by vacuum assisted resin infusion technique. The optimum mechanical properties are obtained for CGRP with 3 wt.% nanoclay. Three types of drills (carbide twist drill D 5407060, HSS twist drill BS-328, and HSS end mill (4 flutes “N”-type end mill RH-helical flute)) of 6 mm diameters are used to drill holes on GRP and CGRP. Three different speeds (600, 852, and 1260 rpm) and two different feeds (0.045, 0.1 mm/rev) are selected as process parameters. The effect of process parameter on thrust force and delamination during drilling CGRP is analyzed for optimizing the machining parameters. The delamination factor is low for the optimum process parameter (feed = 0.1 mm/rev and speed 852 rpm). Microstructural analysis confirms that at higher feeds, delamination is low for CGRP drilled with carbide tools. In order to analyze the effect of nanoclay in CGRP on tool wear, 200 holes were drilled on CGRP samples with 3 wt.% nanoclay, and the tool wear is analyzed under optimized parametric condition. Tool wear is high in HSS twist drill compared with carbide drill. The presence of nanoclay also accelerates the tool wear.

scholarly journals The interlaminar strength of the glass fiber polyester composite

2009 ◽  
Vol 15 (1) ◽  
pp. 45-48 ◽  
Author(s):  
Slavisa Putic ◽  
Branislav Bajceta ◽  
Dragana Vitkovic ◽  
Marina Stamenovic ◽  
Vladimir Pavicevic
Keyword(s):  
Experimental Investigation ◽  
Glass Fiber ◽  
Glass Fibre ◽  
Polyester Composite ◽  
Glass Fibre Reinforced ◽  
Formation Conditions ◽  
Polyester Composites

The paper outlines the method and the results of the experimental investigation of interlaminar strength of glass fibre reinforced polyester composites, with the aim of determining the influence that the structure, a reinforcement type and a sort of resin exert upon the interlaminar strength. The tested specimens were fabricated under different formation conditions, namely in eight composition patterns and with three sorts of resin used for polymerization.

Effect of the Gel Coat Composition on the Tensile Strength for Glass Fibre Reinforced Polyester Composites

2015 ◽  
Vol 1125 ◽  
pp. 79-83 ◽  
Author(s):  
Ahmad ◽  
M.R. Abdullah ◽  
Ab. Saman Abd Kadir
Keyword(s):  
Tensile Strength ◽  
Comparative Analysis ◽  
Glass Fibre ◽  
Gfrp Composites ◽  
Composite Surface ◽  
A Value ◽  
Before And After ◽  
Glass Fibre Reinforced ◽  
Polyester Composites ◽  
The Difference

In this study, the effect of the gel coat composition on tensile strength of glass fibre reinforced polyester (GFRP) composites was evaluated. The experiments were conducted on various gel coat composition and time. Samples were immersed in sea and river water for 6 months to investigate the differences in tensile strength. Optical observation using SEM on the composites surface and comparative analysis in terms of tensile strength were used before and after immersing. As results, the most excellent tensile strength was the gel coat composition consisting of 0.3 kg of reolosil QS-102 with 10 kg of resin SHCP 268BQTN with a value of 51.9 MPa. Tensile strength reduced about 33.4 % compared to other sample where reduced to 46.3401 %. The difference in the composite surface as a result of immersion process on each sample was also discussed in this paper.

scholarly journals PORE MORPHOLOGY INFLUENCE AT POROSITY ULTRASONIC TESTING OF CFRP BY PULSE-ECHO METHOD

2018 ◽  
pp. 22-29 ◽  
Author(s):  
A. S. Boychuk ◽  
V. Yu. Chertischev ◽  
I. A. Dikov ◽  
A. S. Generalov ◽  
A. V. Slavin
Keyword(s):  
Ultrasonic Testing ◽  
Pore Morphology ◽  
Pulse Echo ◽  
Pulse Echo Method ◽  
Morphology Influence

scholarly journals Ultraviolet curing of Glass Fibre Reinforced Polyester Composites

2000 ◽  
Vol 9 (5) ◽  
pp. 096369350000900 ◽  
Author(s):  
Qiang Yuan ◽  
Ming-Bao Yang ◽  
Yiu-Wing Mai
Keyword(s):  
Glass Fibre ◽  
Impact Damage ◽  
Cost Effective ◽  
Ultraviolet Curing ◽  
Fibre Composites ◽  
Glass Fibre Reinforced ◽  
Light Curing ◽  
Polyester Composites ◽  
Laminate Thickness ◽  
The Impact

Light curing of fibre composites was studied to explore its usefulness as a cost-effective production technique without unacceptable sacrifices of mechanical properties. Knitted continuous glass fibre reinforced polyester composites were cured by ultraviolet light and vacuum bag resin infusion (VBRI). A maximum thickness of 13 mm could be achieved with this technique. The compressive strength was shown to be independent of laminate thickness; but both the flexural strength and modulus were reduced with increasing thickness of laminate. The impact damage was also studied using drop-weight impact tests. For the same impact energy imposed on the laminates, the delamination areas decreased with laminate thickness.

scholarly journals Water Absorption Study on Pultruded E-Glass Fibre Reinforced Unsaturated Polyester Composites

2010 ◽  
Vol 19 (3) ◽  
pp. 096369351001900 ◽  
Author(s):  
Hazizan Md Akil ◽  
Leong Wei Cheng ◽  
M. H. Affzan ◽  
A. Abu Bakar ◽  
Z.A. Mohd Ishak
Keyword(s):  
Water Absorption ◽  
Glass Fibre ◽  
Sea Water ◽  
Unsaturated Polyester ◽  
Water Immersion ◽  
Compression Properties ◽  
Glass Fibre Reinforced ◽  
Polyester Composites ◽  
And Diffusion ◽  
Maximum Moisture Content

Glass fibre reinforced unsaturated polyester composites were subjected to water immersion tests in order to study its water absorption behaviour its effects on mechanical properties. Water absorption tests were conducted by immersing composite specimens into three different environmental conditions included distilled water, sea water and acidic solution. Water absorption curves were obtained and diffusion coefficient ( D) and maximum moisture content ( Mm) were determined. The water absorption behaviour of composite was found to follow a so-called Fickian behaviour. The flexural and compression properties were found to decrease with increasing water uptake.

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