Tailoring of tensile and dynamic thermomechanical properties of interleaved chemical-treated fine almond shell particulate flax fiber stacked vinyl ester polymeric composites

2019 ◽  
Vol 233 (11) ◽  
pp. 2311-2322 ◽  
Author(s):  
K Ramraji ◽  
K Rajkumar ◽  
P Sabarinathan
Keyword(s):  
Polymer Composite ◽  
Composite Laminates ◽  
Vinyl Ester ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Weight Fraction ◽  
Thermomechanical Properties ◽  
Flax Fiber ◽  
Almond Shell ◽  
Damping Characteristics

Natural fiber and particulates are being exploited to attain eco-friendly products for construction and automotive sectors. These sectors are moving towards the use of high damping characteristic natural biofibers and particulate-reinforced polymer composite as part of the structural components. In this work, woven flax fiber (0° and 90°) and almond shell particulates were used. They were subsequently treated with alkaline and acetylene chemical solution separately. Polymer composite laminates were prepared using a vinyl ester resin as matrix and by stacking flax fibers and almond particulates interleaved in an alternative sequence using the hand layup technique. This was followed by hydraulic pressing. Composite laminates were fabricated by varying the almond shell particulate weight fraction of 0%, 5%, 10%, and 15%. Mechanical properties such as tensile and flexural strength were experimentally measured. Dynamic thermomechanical analysis was conducted on the alkaline-treated and untreated composites with different frequencies for the assessment of the damping characteristics. The alkaline-treated interleaved almond shell and flax fiber composite showed considerably higher damping characteristics. This could be due to the improved adhesion between the matrix and reinforcements. An addition of almond shell particulate positively increased the strength and stiffness of composites.

scholarly journals Design of Tooling System and Identifying Crucial Processing Parameters for NFPC Manufacturing in Automotive Applications

2021 ◽  
Vol 5 (7) ◽  
pp. 169
Author(s):  
Vardaan Chauhan ◽  
Timo Kärki ◽  
Juha Varis
Keyword(s):  
Composite Material ◽  
Polymer Composite ◽  
Large Scale ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Low Cost ◽  
Polymer Composite Material ◽  
Scale Production ◽  
Tooling System ◽  
Recycled Polymer

The aim of this study was to design a tooling system for manufacturing automotive components using a natural fiber polymer composite (NFPC) material. As a case study, an automotive battery cover was selected and a compression molding tool was designed, keeping in mind the need for the simplicity of the tool and ensuring the low cost of this process. However, since the original part was injection-molded with virgin polypropene, some vital changes made in the part and tool design process were documented as a guideline to show new designers how to approach the design of parts and tools using a natural fiber polymer composite material. Additionally, the challenges faced during the manufacturing of composite parts with the new tool were also documented and solutions to these challenges were suggested for large-scale production. Finally, compressive testing was performed to evaluate the performance of the structure of the designed part and to compare the recycled polymer with NFPC material. Both wood and palm fiber composite material perform better in compression testing compared to the recycled polymer material.

scholarly journals Investigation on Mechanical Properties of Flax/Vinyl Ester Natural Fiber Composite

2014 ◽  
Vol 27 (1) ◽  
pp. 19-24 ◽  
Author(s):  
Hyunbum Park ◽  
Changduk Kong ◽  
Jeonghwan Lee ◽  
Ingwon Kim ◽  
Hoyeon Lee
Keyword(s):  
Mechanical Properties ◽  
Vinyl Ester ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Natural Fiber Composite

scholarly journals Mechanical Behavior of Natural Fiber Composite Material

2021 ◽  
Author(s):  
Vikas Ghanwat ◽  
Jivan Mule ◽  
Saurabh Telore ◽  
Vijay Bhosale ◽  
Sudarshan Patale
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Composite Laminates ◽  
Fiber Length ◽  
Strain Energy ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Natural Fibers ◽  
Industrial Applications ◽  
Coir Fiber

The use of natural fibers as reinforcement in polymeric composites is increasing thanks to the improvements in properties that fibers can provide to the merchandise. Composites materials were prepared by compression molding technique with hand layup process. Treatment of fiber with 2% NaOH was carried out in order to improve the interfacial bonds between fiber and matrix leading to better mechanical properties of the spathe-fiber-reinforced composite laminates. Filler loading as 5% by volume of coir fiber or epoxy resin composites have been formulated. The fiber length was chosen as 5mm, 10mm & 15mm and the ratio of epoxy resin: hardener was maintained as 10:0.8. A total three plates with dimension as 300 mm х 300 mm х 4 mm were produced and specimens as per the varied ASTM standard were tested to determine the ultimate tensile strength, strain energy, flexural strength, strain energy and micro hardness value for different configuration. It was observed that the lastingness of epoxy resin/ coir fiber composites was maximum at 15mm fiber length (16.27 N/mm2). The charpy notch impact strength was also maximum at 15mm fiber length (10.87 kJ/m2). The results show good mechanical properties and hint us as a replacement for conventional materials in industrial applications.

Investigation on Mechanical Properties of Natural Fiber Composite Using RTM Manufacturing Method

2015 ◽  
Vol 752-753 ◽  
pp. 473-476
Author(s):  
Hyun Bum Park
Keyword(s):  
Mechanical Properties ◽  
Vinyl Ester ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Resin Transfer Molding ◽  
Environment Friendly ◽  
Manufacturing Method ◽  
Transfer Molding ◽  
Natural Fiber Composite ◽  
Composite Data

In this study, an investigation on mechanical properties of flax/vinyl ester natural fiber composite was performed. Vacuum Assisted Resin Transfer Molding (VARTM) manufacturing method was adopted for manufacturing the flax fiber composite specimen. The mechanical properties of the manufactured flax composites were compared with flax composite data cited from some references. Based on this, the experimental data showed that the flax/vinyl ester composite has some advantages when it is applied to environment-friendly structure.

Performance analysis of waste silk fabric-reinforced vinyl ester resin laminates

2011 ◽  
Vol 45 (23) ◽  
pp. 2475-2480 ◽  
Author(s):  
Shetty Ravindra Rama ◽  
S.K. Rai
Keyword(s):  
Composite Laminates ◽  
Vinyl Ester ◽  
Chemical Resistance ◽  
Standard Procedure ◽  
Weight Fraction ◽  
Void Content ◽  
Silk Fabric ◽  
Vinyl Ester Resin ◽  
Silk Fabrics ◽  
Made In

Laminates of vinyl ester resin system with different weight fractions of waste silk fabrics ‘as reinforcement’ are developed and their physico-mechanical properties are studied, using standard procedure. Both, tensile strength and modulus of laminates were found to increase with the increase in weight fraction of silk fabric loading. Properties such as density, void content, hardness, and water absorption of the developed composite laminates are studied. Chemical resistance test is also carried out. Attempts to explain these differing trends are made in this study by analyzing the features observed on the cross-section of tensile fractured specimen using fractography employing scanning electron microscopy.

scholarly journals Strengthening of RC Beam using Numerous Natural Fibre Laminates - a Review

2019 ◽  
pp. 394-399
Author(s):  
Sowndharya D ◽  
Kathirvel M ◽  
Yuvaraj K
Keyword(s):  
Reinforced Concrete ◽  
Composite Laminates ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Natural Fibers ◽  
Strength Properties ◽  
Flexural Behavior ◽  
Sisal Fiber ◽  
Reinforced Concrete Structure ◽  
Fiber Flax

Nowadays natural fibers are getting attention from researchers and scholars to use it for construction of buildings because of their sustainability and eco friendly nature. There are various natural fibers like bamboo, sugarcane fiber, coconut coir, sisal fiber, flax fiber etc., are available for construction. Aim of this paper is to give a detailed study about various experiments conducted on the reinforced concrete structure that are strengthened with fiber laminate. The failure load, ductility, crack pattern, strength properties, flexural behavior of reinforced concrete beam, viscous and mechanical properties and strain characteristics of strengthened beams with different natural fiber composite laminates are reviewed. The result shows that the strength, ductility and durability properties of concrete are increased according to their proportions.

scholarly journals Effect of Synthesized Chitosan Flame Retardant On Flammability, Thermal, And Mechanical Properties of Vinyl Ester/Bamboo Nonwoven Fiber Composites

2021 ◽  
Author(s):  
Prabhakar M.N. ◽  
K Venkata Chalapathi ◽  
Ur Rehman Shah Atta ◽  
Jung-il Song
Keyword(s):  
Mechanical Properties ◽  
Heat Release ◽  
Flame Retardant ◽  
Heat Release Rate ◽  
Release Rate ◽  
Vinyl Ester ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Thermal And Mechanical Properties ◽  
Ul 94

Abstract In this study, chitosan-based bio-flame retardant additive (referred to as NCS) was prepared by altering the chitosan (CS) chemically with silica (S) via ion interchange reaction and studied the effect on flame retardant, thermal and mechanical properties of vinyl ester/bamboo fiber (VE/BF) composites manufactured by the vacuum assisted resin transfer molding (VARTM) process. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis used to characterize the NCS. The spectral results revealed a new peak at 1560 cm-1 corresponding to NH3+–-O Si, bring up the interactive bond between CS and S. SEM, and XRD showed the diverse morphology (coarse surface), and significant decrement in the intensity of diffraction patterns respectively support further the formation of NCS. The heat release rate of NCS decreased significantly by 76%, and residual char increased by 47% compared with chitosan. The flame retardant and thermal behavior of NCS-VE/BF composites were examined by UL-94 standards, micro and cone calorimeter and thermogravimetric analysis. The results showed a delay in burning time in UL-94, enhanced LOI % and decrement of peak heat release rate and total heat release rate compared to pure composites by 32, 14, and 18%, respectively. The residual char increased by 47%. The mechanical properties also improved satisfactorily. Overall, the synthesized NCS could be suitable for the fabrication of sustainable flame-retardant natural fiber composite without deterioration of mechanical properties that are suitable for sub-structural parts in engineering applications.

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