Mechanical Properties of Graphene Nanoplatelets-Reinforced Epoxy Grout in Repairing Damaged Pipelines

2019 ◽  
Vol 962 ◽  
pp. 242-248
Author(s):  
Lim Kar Sing ◽  
Libriati Zardasti ◽  
Norhazilan Md Noor ◽  
Nordin Yahaya
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Tensile Tests ◽  
Graphene Nanoplatelets ◽  
Neat Epoxy ◽  
Frp Composites ◽  
Reinforced Polymer ◽  
Noticeable Improvement ◽  
Fibre Reinforced Polymer ◽  
Flexural Tests

The use of Fibre Reinforced Polymer (FRP) composites together with infill grout has been proven effective for repairing damaged steel pipelines. This paper study the mechanical properties of epoxy grouts where an amount of 0.2% and 0.8% of graphene nanoplatelets particles were added to commercial epoxy resin to evaluate their behaviour regarding neat epoxy resin. Compressive tests, tensile tests and flexural tests were conducted to study the effect of graphene nanoplatelets towards neat epoxy resin. By comparing graphene-modified grouts and neat epoxy grout, there is no increment of strength under compression and tensile test due to poor dispersion of graphene nanoplatelets. Nevertheless, the addition of graphene has produced a noticeable improvement in flexural properties. This signifies that with the inclusion of graphene nanoplatelets, the properties of epoxy grout can be improved if a better dispersion can be achieved.

The Effects of Graphene and Flame Retardants on Flammability and Mechanical Properties of Natural Fibre Reinforced Polymer Composites

2016 ◽  
Vol 701 ◽  
pp. 286-290 ◽  
Author(s):  
Pooria Khalili ◽  
Kim Yeow Tshai ◽  
Ing Kong ◽  
Chin Hooi Yeoh
Keyword(s):  
Mechanical Properties ◽  
Flame Retardants ◽  
Tensile Tests ◽  
Natural Fibre ◽  
Zinc Borate ◽  
Bunsen Burner ◽  
Bomb Calorimetry ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Alumina Trihydrate

The effects of incorporating three different types of flame retardant (FR) and two variants of graphene into 10 %wt palm EFB natural fibre (NF) filled epoxy composites were investigated in term of the flammability, thermal and mechanical properties through standard Bunsen burner experiment, bomb calorimetry, TGA and tensile tests. The types of FR employed include zinc borate (ZB), ammonium polyphosphate (APP) and alumina trihydrate (ATH) while a lab synthesised and a commercial form of graphene were used in the current work. Compared to the neat NF filled epoxy composite, specimens loaded with 15 %wt of either ZB or APP demonstrated a drip-free condition as observed from the Bunsen burner tests, which could be attributed to the strong char forming characteristic of the compositions. In specimens containing 15 %wt of either ZB or ATH, results from Bomb calorimetry revealed that these specific formulations produced the lowest mean gross heat release amongst others, suggesting better resistant to flame. Relative to the graphene incorporated composites, the post TGA measured mass residue was observed to be greater in FR rich formulations, suggesting that FR additives capable of yielding a much superior flame retardancy compared to graphene. While a slight increases in Young’s modulus was recorded in composites loaded with FR, such formulations produced several main drawbacks whereby reduction in ultimate tensile strength and elongation to break were being measured in large proportion of the specimens.

Evaluation of Mechanical Properties of Banana and Glass-Epoxy Hybrid Composites with Addition of Copper Powder

2019 ◽  
Vol 11 (3) ◽  
Author(s):  
P. Parameswaran ◽  
V. Vijayan ◽  
K. Radhakrishnan ◽  
A.Godwin Antony
Keyword(s):  
Mechanical Properties ◽  
Metal Powder ◽  
Hybrid Composites ◽  
Glass Fibres ◽  
Frp Composites ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Temperature Application ◽  
Deflection Test ◽  
Made In

More studies have been made in recent years on the fibre reinforced polymer. Natural fibres play an important role in modern FRPs. To obtain higher mechanical properties, glass fibres are incorporated to prepare hybrid FRP composites. Present study, focuses the effect of adding the copper metal powder in polymer matrix i.e. the metal powder is mixed in the resin with varying proportions along with the banana and glass fibres. Five laminates were fabricated by varying the copper content from 1% to 5% and keeping the banana and glass fibres weight as common. The study concentrates on mechanical properties of the obtained hybrid composites. Good flexural and ultimate tensile strengths were obtained. The flame deflection test shows the hybrid composite is not suitable for high temperature application as it breaks the bond between the resin and the reinforcements due to thermal conductivity of copper.

scholarly journals Investigation of Mechanical Properties on Fibre Reinforced Polymer Nanocomposites Using ABAQUS

2021 ◽  
Vol 309 ◽  
pp. 01029
Author(s):  
A. Padma Rao ◽  
V. Murali Krishna ◽  
Ganji Venu
Keyword(s):  
Mechanical Properties ◽  
Tensile Load ◽  
Tensile Tests ◽  
Scratch Resistance ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Minor Part ◽  
A Minor ◽  
Composite Samples

The main aim of this work is to explore the Nanocomposites for industrial and engineering applications. Nanocomposites or nanofillers are bringing exemplary changes in the field of material science and polymer composites. In this complicated process a minor part of material is added to a variety of polymers and other materials which can improve the performance and quality of materials including mechanical, thermal, flexural stiffness, tensile strength, toughness, water absorption, flame retardancy and scratch resistance etc. This paper is concerned with investigation of the mechanical properties on composite material made of E-Glass fibre and LY556 epoxy with induced nanoparticles under tensile load. The tensile tests carried out on different composite samples as per the ASTM standard.

scholarly journals Effect of graphene nanoplatelet filling on mechanical properties of natural fiber reinforced polymer composites

2021 ◽  
Vol 63 (4) ◽  
pp. 322-328
Author(s):  
Yusuf Eren Erdoğdu ◽  
Engin Eren Korkmaz ◽  
Şemsettin Temiz
Keyword(s):  
Mechanical Properties ◽  
Natural Fiber ◽  
Epoxy Composite ◽  
Composite Plates ◽  
Graphene Nanoplatelets ◽  
Processing Times ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
The Matrix ◽  
Flexural Tests

Abstract In this study, the mechanical properties of plain woven jute-epoxy composite materials were investigated after filling graphene nanoplatelets (GNPs) in different proportions. The time dependent changes in the viscosity and temperature of unfilled epoxy resin, with 0.5, 1 and 2 wt.-% graphene nanoplatelets filled epoxy resins were observed. Woven jute reinforced unfilled, 0.5 wt.-% GNPs filled and 1 wt.-% GNPs filled epoxy composite plates were produced by using vacuum assisted resin transfer molding (VARTM) at the same waiting and processing times. Specimens were prepared and subjected to tensile and flexural tests according to ASTM D 3039 and ASTM D 790 standards, respectively. Images were taken and evaluated with a scanning electron microscope (SEM) in areas where tensile damage occurred. It was observed that the gap amount between the fiber and the matrix increased and the interface adhesion decreased as the fill amount increased in the composites produced. The testing results indicated that the tensile and flexural properties of composites decreased at 0.5 wt.-% and 1 wt.-% during the GNPs loading as compared to unfilled composites.

scholarly journals A Review on Mechanical Properties of Natural Fibre Reinforced Polymer Composites under Various Strain Rates

2021 ◽  
Vol 5 (5) ◽  
pp. 130
Author(s):  
Tan Ke Khieng ◽  
Sujan Debnath ◽  
Ernest Ting Chaw Liang ◽  
Mahmood Anwar ◽  
Alokesh Pramanik ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
Polymer Composites ◽  
Stress Transfer ◽  
Natural Fibre ◽  
Transfer Efficiency ◽  
Strain Rates ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Fibre Matrix

With the lightning speed of technological evolution, the demand for high performance yet sustainable natural fibres reinforced polymer composites (NFPCs) are rising. Especially a mechanically competent NFPCs under various loading conditions are growing day by day. However, the polymers mechanical properties are strain-rate dependent due to their viscoelastic nature. Especially for natural fibre reinforced polymer composites (NFPCs) which the involvement of filler has caused rather complex failure mechanisms under different strain rates. Moreover, some uneven micro-sized natural fibres such as bagasse, coir and wood were found often resulting in micro-cracks and voids formation in composites. This paper provides an overview of recent research on the mechanical properties of NFPCs under various loading conditions-different form (tensile, compression, bending) and different strain rates. The literature on characterisation techniques toward different strain rates, composite failure behaviours and current challenges are summarised which have led to the notion of future study trend. The strength of NFPCs is generally found grow proportionally with the strain rate up to a certain degree depending on the fibre-matrix stress-transfer efficiency. The failure modes such as embrittlement and fibre-matrix debonding were often encountered at higher strain rates. The natural filler properties, amount, sizes and polymer matrix types are found to be few key factors affecting the performances of composites under various strain rates whereby optimally adjust these factors could maximise the fibre-matrix stress-transfer efficiency and led to performance increases under various loading strain rates.

Mechanichal Properties of DGEBA/TEPA Modified Epoxy Resin

2014 ◽  
Vol 775-776 ◽  
pp. 588-592
Author(s):  
Camila Rodrigues Amaral ◽  
Ruben Jesus Sanchez Rodriguez ◽  
Magno Luiz Tavares Bessa ◽  
Verônica Scarpini Cândido ◽  
Sergio Neves Monteiro
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Epoxy Resin ◽  
Yield Stress ◽  
Diglycidyl Ether ◽  
Notch Toughness ◽  
Epoxy Network ◽  
Structural Network ◽  
Flexural Tests ◽  
Modified Epoxy

The correlation between the structural network of a diglycidyl ether of the bisphenol-A (DGEBA) epoxy resin, modified by two distinct aliphatic amines (tetraethylenepentamine TEPA and jeffamine D230), and its mechanical properties, was investigated as possible matrix for abrasive composites applications. Both flexural tests, to determine the yield stress and the elastic modulus, as well as impact tests to determine the notch toughness, were performed. The DGEBA/D230 presented the highest stiffness and toughness but lowest yield stress. This epoxy network also displayed a greater plastic deformation during fracture.

Mechanical properties of hybrid fibre reinforced polymer-timber veneer laminates

2021 ◽  
Vol 301 ◽  
pp. 124316
Author(s):  
Li Min ◽  
Dilum Fernando ◽  
Michael Heitzmann ◽  
Chuang Miao
Keyword(s):  
Mechanical Properties ◽  
Reinforced Polymer ◽  
Hybrid Fibre ◽  
Fibre Reinforced Polymer
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