Radiation Shielding of Fiber Reinforced Polymer Composites Incorporating Lead Nanoparticles—An Empirical Approach

In the present work, an empirical approach based on a computational analysis is performed to study the shielding properties of epoxy/carbon fiber composites and epoxy/glass fiber composites incorporating lead nanoparticle (PbNPs) additives in the epoxy matrix. For this analysis, an MCNP5 model is developed for calculating the mass attenuation coefficients of the two fiber reinforced polymer (FRP) composites incorporating lead nanoparticles of different weight fractions. The model is verified and validated for different materials and different particle additives. Empirical correlations of the mass attenuation coefficient as a function of PbNPs weight fraction are developed and statistically analyzed. The results show that the mass attenuation coefficient increases as the weight fraction of lead nanoparticles increases up to a certain threshold (~15 wt%) beyond which the enhancement in the mass attenuation coefficient becomes negligible. Furthermore, statistical parameters of the developed correlations indicate that the correlations can accurately capture the behavior portrayed by the simulation data with acceptable root mean square error (RMSE) values.

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Influence of graphene fillers on vibration characteristics of tapered hybrid GFRP composite beams under elevated temperature condition: Numerical and experimental study

Journal of Vibration and Control ◽

10.1177/10775463211045795 ◽

2021 ◽

pp. 107754632110457

Author(s):

Akshay Pawgi ◽

Akshay Bharadwaj Krishna ◽

Shikhar Gupta ◽

Paul Praveen A ◽

Ananda Babu Arumugam ◽

...

Keyword(s):

Glass Fiber ◽

Weight Fraction ◽

Composite Beams ◽

Fiber Reinforced Polymer ◽

Fiber Reinforced ◽

Glass Fiber Reinforced Polymer ◽

Polymer Hybrid ◽

Reinforced Polymer ◽

Glass Fiber Reinforced ◽

Hybrid Beams

In this study, numerically and experimentally the dynamic characteristics of graphene-reinforced glass fiber–reinforced polymer hybrid uniform and thickness tapered laminated composite beams were investigated. First, the graphene-epoxy nanocomposite solution without and with 0.25, 0.50, and 0.75 wt.% of graphene reinforcement is prepared by the heat shearing technique and then used for the fabrication of glass fiber–reinforced polymer hybrid uniform and thickness tapered composite beams using the hand lay-up method. The elastic properties of the hybrid beams were evaluated using the impulse excitation of vibration technique (ASTM E1876-15) under elevated temperature. Further, the numerical and experimental modal analysis of the hybrid beams with uniform and tapered configurations were conducted with variation in wt.% of graphene particles under fixed-fixed and fixed–free end supports. The results reveal that the natural frequencies of the glass fiber–reinforced polymer hybrid uniform and tapered configurations with 0.25 wt.% of graphene are greater than those of the glass fiber–reinforced polymer beams without graphene reinforcement and observed lesser for 0.5 and 0.75 wt.% of graphene under fixed-fixed and fixed-free end supports, respectively, due to unavoidable agglomeration effects. Furthermore, the parametric study was performed with the influence of weight fraction of graphene and temperature on the transverse response of the tapered composite beam. Hence, it can be concluded that the use of graphene filler in the glass fiber–reinforced polymer composites in the tapered composite beams improves the bending natural frequencies significantly when the weight fraction of the graphene is used lesser as agglomeration is unavoidable in practical condition. Therefore, the comprehensive numerical and experimental work presented in this study will be useful to the designers while using graphene fillers to improve the bending characteristics of the tapered composite beams.

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Manufacturing of Banana Fiber Composites for different Compositions and its Experimental Tensile Testing

10.21467/proceedings.118.14 ◽

2021 ◽

Author(s):

Popat B Asabe ◽

Shrikrushn B Bhosale ◽

Sonali S Patil ◽

Avinash K Parkhe

Keyword(s):

Composite Materials ◽

Polymer Composites ◽

Resin Composite ◽

Engineering Application ◽

Fiber Composites ◽

Fiber Reinforced Polymer ◽

Fiber Direction ◽

Fiber Reinforced ◽

Banana Fiber ◽

Reinforced Polymer

The world's attention is now focused on resources that are environmentally friendly and recyclable. Due to growing environmental concerns, a bio composite made of standard fiber and polymeric resin is one of the most recent breakthroughs in the industry and establishes the current scope of experimental activity. In the engineering application, the use of composite materials is gradually growing. The matrix and fiber are the two primary segments of the composite. The availability of high-quality fiber and ease of assembly has prompted inventors all over the world to test regionally accessible low-cost yarn and determine their ability to protect grit and how much they can perform the thankful facts of great reinforced polymer composites intended for structural use. Fiber reinforced polymer compounds have everyday preferences, such as requiring less effort to create, being easier to create, and having a higher quality disparity than perfect polymer. For this reason, fiber reinforced polymer composites are used in a variety of applications as a structural material. Composite materials are mostly developed in response to technological needs. Natural fibers have recently piqued the interest of scientists and technologists due to the advantages they offer over traditional reinforcement materials, and the creation of bio fiber composites has been a hot topic in recent years. The present work spotlight on study of mechanical properties of banana fiber/epoxy resin composite at 30%, 40% and 50% volume fractions of banana fiber and different fiber direction 00, 450 & 900.The mechanical property like tensile strength is experimentally evaluated.

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Characterization and Possibility of Coconut Filter Fibers as Reinforcement for Polymers

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.217-218.1202 ◽

2011 ◽

Vol 217-218 ◽

pp. 1202-1207 ◽

Cited By ~ 2

Author(s):

N.P.G. Suardana ◽

Ali Abdalla ◽

Ho Cheol Yoon ◽

Jian Guo Cui ◽

Do Yeon Jung ◽

...

Keyword(s):

Mechanical Properties ◽

Fiber Composites ◽

Fiber Reinforced Polymer ◽

Fiber Reinforced ◽

Hot Press ◽

X Ray Diffraction ◽

X Ray ◽

Chemical Treatments ◽

Reinforced Polymer ◽

Treated Fiber

Untreated and treated with alkali (NaOH), acrylic acid (AA), diammonium phosphate (DAP), and maleic anhydride (MA) of coconut filter (CF) fibers were characterized using scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), and single fiber test. The composites were fabricated from CF and film resins (Polylactic-acid (PLA) and Polypropylene (PP)) using a hot press machine. Generally, our results indicated that chemical treatments improved the mechanical properties of CF fiber composites, except for the DAP-treated fiber/PP composite. The AA treatment of fiber produced the best adhesion at the fiber-matrix interface. Consequently, the tensile and flexural strengths of AA-treated fiber-reinforced polymer were the highest. CF fiber-reinforced PLA composites had better mechanical properties than CF fiber-reinforced PP composites. Our results show that CF fiber is feasible as a reinforcement for polymer composites.

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Recycled Carbon Fiber as Flame Retardant in Palm-Based Polyurethane Composite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1087.251 ◽

2015 ◽

Vol 1087 ◽

pp. 251-256 ◽

Cited By ~ 1

Author(s):

Khairiah Haji Badri ◽

Mariana Mohd Zaini ◽

Ahmad Zhafreen Reza Ahmad Redfzi ◽

Muhammad Syukri Ngah

Keyword(s):

Carbon Fiber ◽

Chemical Interaction ◽

Fiber Composites ◽

Fiber Reinforced Polymer ◽

Carbon Fiber Reinforced Polymer ◽

Carbon Fiber Composites ◽

Polyurethane Composite ◽

Reinforced Polymer ◽

Polyurethane Composites ◽

Sem Analyses

The effect of recovered carbon fiber (rCF) to the burning property of polyurethane composites was investigated. The carbon fiber reinforced polymer (CFRP) in mat form was first glycolysed at 190-200 oC and characterized by FTIR, TGA, DSC and SEM analyses. The rCF was added at 0, 0.5, 1.0 and 1.5% (w/w). The polyurethane filled with recovered carbon fiber composites (PU-rCF) have also undergone burning test. The TGA analysis of PU-rCF indicated the percentage of weight loss decreased from 95.6% to 91.4% as rCF content increased. The DSC showed the glass transition temperature, Tg of PU-rCF increased with increasing addition of rCF from 56.7 to 63.0oC. The burning rate of the PU-rCF decreased from 6.1 mm∙s-1 to 2.8 mm∙s-1 with increasing rCF. The FTIR analysis confirmed that there was no chemical interaction between the rCF and PU. The addition of rCF to PU has improved the burning property of the composite.

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Carbon Fiber Reinforced Polymer with Shredded Fibers: Quasi-Isotropic Material Properties and Antenna Performance

International Journal of Antennas and Propagation ◽

10.1155/2017/6152651 ◽

2017 ◽

Vol 2017 ◽

pp. 1-11 ◽

Cited By ~ 9

Author(s):

Gerald Artner ◽

Philipp K. Gentner ◽

Johann Nicolics ◽

Christoph F. Mecklenbräuker

Keyword(s):

Carbon Fiber ◽

Ground Plane ◽

Monopole Antenna ◽

Fiber Reinforced Polymer ◽

Carbon Fiber Reinforced Polymer ◽

Carbon Fiber Composites ◽

Fiber Reinforced ◽

Antenna Performance ◽

Reinforced Polymer ◽

Carbon Fiber Reinforced

A carbon fiber reinforced polymer (CFRP) laminate, with the top layer consisting of shredded fibers, is proposed and manufactured. The shredded fibers are aligned randomly on the surface to achieve a more isotropic conductivity, as is desired in antenna applications. Moreover, fiber shreds can be recycled from carbon fiber composites. Conductivity, permittivity, and permeability are obtained with the Nicolson-Ross-Weir method from material samples measured inside rectangular waveguides in the frequency range of 4 to 6 GHz. The decrease in material anisotropy results in negligible influence on antennas. This is shown by measuring the proposed CFRP as ground plane material for both a narrowband wire monopole antenna for 5.9 GHz and an ultrawideband conical monopole antenna for 1–10 GHz. For comparison, all measurements are repeated with a twill-weave CFRP.

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