Experimental Studies on Abrasion Wear and Thermal Characteristics of Plain Derived Flax Woven Fabric Reinforced Epoxy Composites

2021 ◽  
pp. 1-16
Author(s):  
Vinu Kumar Shettahalli Mantaiah ◽  
Senthil Kumar Kallippatti Lakshmanan ◽  
Subramanian Kaliappagounder
Keyword(s):  
Experimental Studies ◽  
Thermal Characteristics ◽  
Woven Fabric ◽  
Epoxy Composites ◽  
Abrasion Wear

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.

Electromagnetic properties of three-dimensional woven carbon fiber fabric/epoxy composite

2017 ◽  
Vol 88 (20) ◽  
pp. 2353-2361 ◽  
Author(s):  
Wei Fan ◽  
Dan-dan Li ◽  
Jia-lu Li ◽  
Juan-zi Li ◽  
Lin-jia Yuan ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Carbon Fiber ◽  
Electromagnetic Interference ◽  
Three Dimensional ◽  
Woven Fabric ◽  
Epoxy Composites ◽  
Woven Composites ◽  
Carbon Fiber Fabric ◽  
Fiber Fabric ◽  
Wave Properties

To investigate the reinforcement architectures effect on the electromagnetic wave properties of carbon fiber reinforced polymer composites, three-dimensional (3D) interlock woven fabric/epoxy composites, 3D interlock woven fabric with stuffer warp/epoxy composites, and 3D orthogonal woven fabric/epoxy composites were studied by the free-space measurement system. The results showed that the three types of 3D woven carbon fiber fabric/epoxy composites had a slight difference in electromagnetic wave properties and the absorption was their dominant radar absorption mechanism. The electromagnetic wave absorption properties of the three types of composites were more than 90% (below −10 dB) over the 11.2–18 GHz bandwidth, and more than 60% (below −4 dB) over the 8–12 GHz bandwidth. Compared with unidirectional carbon fiber reinforced plastics, the three kinds of 3D woven carbon fiber fabric/epoxy composites exhibited better electromagnetic wave absorption properties over a broadband frequency range of 8–18 GHz. Therefore, the three kinds of 3D woven composite are expected to be used as radar absorption structures due to their excellent mechanical properties and outstanding absorption capacity. The total electromagnetic interference shielding effectiveness of the three types of 3D carbon fiber woven composites are all larger than 46 dB over the 8–12 GHz bandwidth, which is evidence that the three types of 3D carbon fiber woven composites can be used as excellent shielding materials for electromagnetic interference.

Numerical and experimental studies on the thermal characteristics of the clutch hydraulic system with provision for oil flow

2019 ◽  
Vol 71 (6) ◽  
pp. 733-740 ◽  
Author(s):  
Biao Ma ◽  
Liang Yu ◽  
Man Chen ◽  
He Yan Li ◽  
Liang Jie Zheng
Keyword(s):  
Thermal Resistance ◽  
Network Model ◽  
Hydraulic System ◽  
Experimental Studies ◽  
Thermal Characteristics ◽  
Parameter Method ◽  
Content Type ◽  
Resistance Network ◽  
Oil Flow ◽  
Resistance Network Model

PurposeThis paper aims to investigate the thermal characteristics of the clutch hydraulic system under various oil flow conditions. Increasing the oil flow is one of the most important approaches to reduce the clutch temperature. However, the effect of the oil flow on the clutch temperature remains to be explored.Design/methodology/approachThe thermal resistance network model and the lumped parameter method are used to study the thermal characteristics of the clutch hydraulic system. The predicted temperature variations of the clutch and the oil are compared with experimental data.FindingsResults demonstrate that the larger the friction power is, the higher the temperatures of the clutch and the oil are. However, the temperature growth rates of the clutch and oil present different trends: the former decreases gradually and the latter increases constantly. Additionally, increasing the oil flow within a certain range gives rise to the decrease of clutch temperature and the increase of oil temperature; nevertheless, their variation trends are gradually weakening. When the oil flow is large enough, it brings a slight effect on the clutch temperature rise.Originality/valueThis paper extends the knowledge into the oil flow supply of the clutch hydraulic system. The conclusions can provide a theoretical guidance for the oil management of the transmission system. Additionally, the thermal resistance network model is also effective and efficient for other hydraulic equipment to predict the temperature variation.

scholarly journals Strain Rate Effects on Tensile and Compressive Behaviour of Woven-Knitting Glass/Epoxy Composites

2013 ◽  
Vol 22 (1) ◽  
pp. 096369351302200 ◽  
Author(s):  
Mehmet Aktas ◽  
H. Ersen Balcioğlu ◽  
Gürhan Külahli
Keyword(s):  
Strain Rate ◽  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Testing Machine ◽  
Fibre Volume ◽  
Woven Fabric ◽  
Epoxy Composites ◽  
Compressive Properties ◽  
Compressive Behaviour ◽  
Low Strain Rate

The main purpose of this study was to investigate the tensile and compressive behaviour of woven-knitting glass/epoxy composites under low strain rate by using UTEST testing machine with capacity of 50kN. The strain rate values were selected as 0.005, 0.0005 and 0.00005s−1. The effect of knitting direction as wale, course and 45° and knitting structure as rib and milano on the tensile and compressive behaviour of woven-knitting glass/epoxy composites under low strain rate was also discussed. The woven-knitting composite samples were tested under uni-axial tensile and compressive loading. The woven-knitting composites have eight layer with woven fabric (W), rib (R) and milano (M) knitting fabrics as (W2/R2)S and (W2/M2)S. The woven-knitting composites were manufactured by hand lay-up method. The fibre volume fraction and thickness of manufactured woven-knitting composites were measured 65% in weight and 2.9mm, respectively. The experimental results showed that the tensile and compressive properties of woven-knitting glass/epoxy composites decrease from 0.005 s−1 to 0.00005s−1. The tensile properties in all directions of plate with rib knitting were obtained higher than the plate with milano knitting. However, the highest compressive properties were obtained from plate with rib knitting in course direction.

Mechanical, chemical and sound absorption properties of glass/kenaf/waste tea leaf fiber-reinforced hybrid epoxy composites

2020 ◽  
pp. 152808372095739 ◽  
Author(s):  
L Prabhu ◽  
V Krishnaraj ◽  
S Gokulkumar ◽  
S Sathish ◽  
MR Sanjay ◽  
...  
Keyword(s):  
Sound Absorption ◽  
Hybrid Composites ◽  
Experimental Studies ◽  
Epoxy Composites ◽  
Fiber Reinforced ◽  
Waste Tea ◽  
Kenaf Fibers ◽  
Tea Leaf ◽  
Absorption Characteristics ◽  
Leaf Fiber

This work aims to investigate the mechanical and sound absorption characteristics of industrial waste tea leaf fiber (WTLF), kenaf and E-glass fiber–reinforced hybrid epoxy composites through experimental studies. The WTLF and kenaf fibers were initially treated with 5% sodium hydroxide. Hybrid composites were fabricated by compression molding technique with a composition of 40 wt.% fiber and 60 wt.% matrix. The fabricated hybrid composites were subjected to mechanical and sound absorption studies as per ASTM standards. Results revealed better mechanical properties in the composites with 25 wt.% kenaf and 5 wt.% WTLF, whereas sound absorption characteristics were better for composites containing 25 wt.% WTLF and 5 wt.% kenaf fiber. The surface morphology of the fractured specimens such as fiber pullout and matrix crack was examined using scanning electron microscopy. Spectrum investigation of alkali-treated hybrid composites showed excellent interfacial bonding between the polymer and fiber compared to the untreated fiber.

Experimental Determination of Thermal Characteristics of Wastewater Sludge for Design of Incineration Plants

2017 ◽  
Vol 21 (3) ◽  
pp. 32-35
Author(s):  
P.V. Khoreva ◽  
I.M. Bernadiner
Keyword(s):  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Experimental Studies ◽  
Thermal Characteristics ◽  
Wastewater Sludge ◽  
Municipal Wastewater Treatment ◽  
Water Problem ◽  
Discharge Regulation ◽  
Regulation Mechanisms ◽  
Municipal Wastewater Treatment Plants

Current trends of improving of wastewater discharge regulation mechanisms in centralized municipal systems of sewage disposal and in water bodies, the tightening of the requirements for the quality of wastewater, stimulate the development of technologies for their treatment. While improving the quality characteristics of the treated water, problem of formation and subsequent disposal of large source of waste – wastewater sludge (WS) – remains unresolved to date. There were presented information confirming the increase in the volumes of WS produced at municipal wastewater treatment plants. There were presented results of experimental studies on the effect of the thermal characteristics of sludge on the process of their incineration.

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