Development and mechanical characterization of microwave-cured thermoplastic based natural fibre reinforced composites

2018 ◽  
Vol 32 (10) ◽  
pp. 1427-1442 ◽  
Author(s):  
Manoj Kumar Singh ◽  
Sunny Zafar
Keyword(s):  
Mechanical Characterization ◽  
Mechanical Performance ◽  
Natural Fibre ◽  
Weight Percentage ◽  
Microwave Curing ◽  
Interlaminar Shear ◽  
Traditional Manufacturing ◽  
The Impact ◽  
Fibre Reinforced Composites

In the present work, polypropylene (PP)- and polyethylene (PE)-based composites were cured using microwave energy with 15% weight percentage of jute and kenaf fibres. The detailed mechanism of microwave curing of the composites has been discussed with suitable illustrations. The mechanical characterization of the microwave-cured composites was carried out using various tests. The scanning electron microscope (SEM) fractographs were used to study the mechanisms of failure. The ultimate tensile strength of various microwave-cured composites was in the range of 44–50 MPa. The interlaminar shear strength of the PP-based composites was 62% higher than the PE-based composites. The impact energy of the microwave-cured composites was in the range of 18–24 kJ. The mechanical performance of the microwave-cured composites was comparable to the composites obtained through traditional manufacturing routes.

Characterization of discontinuous carbon fiber liquid molded PA-6 composites via strategic placement of additional reinforcements

2018 ◽  
Vol 37 (22) ◽  
pp. 1335-1345 ◽  
Author(s):  
Siddhartha Brahma ◽  
Vikas Patel ◽  
Selvum Pillay ◽  
Haibin Ning ◽  
Vinoy Thomas
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Surface Area ◽  
Mechanical Characterization ◽  
Mechanical Performance ◽  
Total Surface Area ◽  
Sem Analysis ◽  
Average Increase ◽  
Similar Increase

The flexibility of processing PA6-based discontinuous carbon fiber panels using vacuum-assisted resin transfer molding was studied. The ease of incorporating various reinforcements namely baseline, tow in the center of preform, fabric in the center of preform and fabric on the outside as skin was investigated. Mechanical characterization was conducted on all the variations made. There was an average increase of about 3%, 20% and 47% in the tensile properties of tow in the center, fabric in the center and fabric on the outside as skin, respectively, as compared to the baseline. A similar increase in properties was noticed in its flexural and impact strength. The data showed a correlation between the mechanical properties and the total surface area of additional reinforcements used. As the surface area of the reinforcement increased, the mechanical properties increased as well. It also showed that reinforcements on the surface of the preform as a skin performed the best. DMA analysis showed the effect of reinforcement on the storage modulus and tan delta across temperatures ranging from 30°C to 150°C. SEM analysis showed that the fibers and the additional reinforcements were coated with PA6 which translated into consistent mechanical performance.

Mechanical performance of hybrid woven jute–roselle-reinforced polyester composites

2019 ◽  
Vol 27 (7) ◽  
pp. 407-418 ◽  
Author(s):  
Mohammad Hazim Mohamad Hamdan ◽  
Januar Parlaungan Siregar ◽  
Sabu Thomas ◽  
Maya John Jacob ◽  
Jamiluddin Jaafar ◽  
...  
Keyword(s):  
Composite Plate ◽  
Synthetic Fibre ◽  
Mechanical Performance ◽  
Flexural Modulus ◽  
Natural Fibre ◽  
Impact Testing ◽  
Void Content ◽  
Fibre Reinforcement ◽  
Pull Out ◽  
The Impact

Natural fibre acts as a significant replacement for the known synthetic fibre that tends to cause critical environmental issues. Hence, the hybridization of natural fibre reinforcement has been considered as one of the strategies in reducing synthetic fibre applications. The current research was conducted to determine the effect of layering sequence on the mechanical performance of hybrid woven jute–roselle. In addition, eight different types of composite plate that consisted of single and hybrid were fabricated through the implementation of hand lay-up method. In this case, each composite plate had to undergo the tensile, flexural and impact testing in order to acquire the effect of varying layering sequences. The results of the present study showed that the hybridization of jute–roselle provided was significant, especially on the flexural and impact performance. Furthermore, the tensile strength and modulus were higher on the JRRJ sample and maximum flexural strength also managed to be recorded by the same sample. However, the maximum flexural modulus only managed to be recorded in sample RRJJ. Meanwhile, the impact testing revealed that the composite plate of sample JJRR had the highest impact strength. The void content for all the samples was acceptable because all of them were less than 7%. Finally, scanning electron microscopic image illustrated that the fractured surfaced of composite sample was typically smooth with less formation of void and fibre pull-out.

Mechanical characterization of intralaminar natural fibre-reinforced hybrid composites

2019 ◽  
Vol 175 ◽  
pp. 107149 ◽  
Author(s):  
D.K.K. Cavalcanti ◽  
M.D. Banea ◽  
J.S.S. Neto ◽  
R.A.A. Lima ◽  
L.F.M. da Silva ◽  
...  
Keyword(s):  
Mechanical Characterization ◽  
Hybrid Composites ◽  
Natural Fibre

Influence of the Kind and the Shape of Insulating Materials on the Mechanical Properties of the Composites Plaster- Granular Cork and Plaster- Fiber Alpha

2021 ◽  
Vol 886 ◽  
pp. 241-255
Author(s):  
Youssef Maaloufa ◽  
Soumia Mounir ◽  
Khabbazi Abdelhamid ◽  
Khalid El Harrouni
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Thermal Performance ◽  
Mechanical Characterization ◽  
Mechanical Performance ◽  
Building Envelope ◽  
Insulating Materials

The objective of our work is to study the influence of nature and the shape of the insulating materials on the mechanical performance of composites based on plaster. The study aims to increase the thermal performance of the building envelope and the same time maintains sufficient mechanical properties of the composites studied. Plaster was combined with two additives (alpha fiber and granular cork). A physical and mechanical characterization of the composites plaster-fiber alpha and plaster-cork was carried on. Authors obtained an important gain in term of lightness 27 % concerning the composite plaster-fiber alpha, however for the composite plaster-cork, the value is 34 %. Concerning the mechanical properties, authors found a decrease in flexural strength of 60 % for the plaster-cork, and an increase of 33 % for the plaster-alpha fiber. For the compressive strength, a reduce of 87 % for the plaster-alpha fiber and 80% for the plaster-cork was observed. Those finding are justified by the scanning microscopic electron tests which show the distribution of the two insulators and adhesion within the plaster matrix.

Mechanical Performance of a Plate Made by RC and Repaired through SFRC Material

2015 ◽  
Vol 1119 ◽  
pp. 677-682
Author(s):  
Alessandra Dal Cin ◽  
Lorenzo Massaria ◽  
Enzo Siviero
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Mechanical Characterization ◽  
Mechanical Performance ◽  
Concrete Slab ◽  
Crack Pattern ◽  
Slab Surface ◽  
Reinforced Concrete Slab ◽  
Rc Slabs

The aim of this study is to evaluate the influence of SFRC repairs of different thicknesses on the mechanical performance of RC slabs, especially with respect to the crack pattern and level of cracking load. To understand the influence of SFRC, in terms of performance and variation of cracking load after repairing, a comparison with a reinforced concrete slab without fiber reinforcement was made. The study shows also the mechanical characterization of SFRC through conventional testing, to evaluate compressive strength, fracture energy, tensile strength and toughness. Concerning the application of SFRC on the concrete slab surface, the bond was improved by removing a small amount of superficial material. Finally, the experimental results on cracks distribution, displacements and level of cracking load are shown.

Processing and Characterization of Natural Fibre Reinforced Composites Using Lignin Phenolic Binder

2013 ◽  
Vol 21 (4) ◽  
pp. 199-206 ◽  
Author(s):  
Arunjunai Raj Mahendran ◽  
Günter Wuzella ◽  
Nicolai Aust ◽  
Uwe Müller ◽  
Andreas Kandelbauer
Keyword(s):  
Natural Fibre ◽  
Reinforced Composites ◽  
Fibre Reinforced Composites

Mechanical Characterization of Polypropylene Natural Fibre Composites

2011 ◽  
Vol 383-390 ◽  
pp. 2737-2740 ◽  
Author(s):  
Sd Jacob Muthu ◽  
Ratnam Paskaramoorthy
Keyword(s):  
Mechanical Properties ◽  
Mechanical Characterization ◽  
Fibre Surface ◽  
Alkaline Treatment ◽  
Natural Fibre ◽  
Fibre Composites ◽  
The Matrix ◽  
Pp Composites ◽  
Fibre Loading

Using polypropylene (PP) as matrix and kenaf mat as reinforcement, composite test samples were fabricated by compression molding. Thereafter, the effect of fibre loading and the alkaline fibre surface treatment on the mechanical properties were studied. The kenaf/PP composites were found to have better mechanical properties than the polymer matrix. As expected, the interfacial bonding between the matrix and the fibres improved considerably when the fibres were subjected to alkaline treatment.

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