Enhancement of bi-axial glass fibre reinforced polymer composite with graphene platelet nanopowder modifies epoxy resin

Priya, I. Infanta Mary; Vinayagam, B. K.

doi:10.1177/1687814018793261

Cited by 29 publications

(9 citation statements)

References 25 publications

(46 reference statements)

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“…The hybrid composites showed higher void content compared to non-hybrid composites attributed due to the difference in resin wettability of selected fabrics and compatibility of fabrics. However, the fiber volume content in the laminates is about 65-73%, which is well within the range generally observed in the literature for similar FRP composites [24][25][26][27]. Also, the void content is below 5.6 Vol.% for all fabricated samples as shown in Table 1.…”

Section: Fiber and Voids Contentsupporting

confidence: 87%

High-velocity impact behavior of hybrid fiber-reinforced epoxy composites

Stephen

Shivamurthy

Mourad

et al. 2021

J Braz. Soc. Mech. Sci. Eng.

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In this study, non-hybrid and hybrid (Kevlar, carbon and glass) fabric epoxy composite laminates were fabricated with different stacking sequences by hand lay-up followed by hot-compression molding. Experimental tests were conducted to investigate tensile, flexural, and hardness characteristics. It was found that the stacking sequence did not significantly affect the tensile strength and hardness values of the composites; however, it affected their flexural strength. Damage morphology of the specimens through SEM images showed that the major damage mechanisms in the composites were delamination, fiber breakage, pull-out, and matrix cracking. Based on the static experimental results, the high-velocity impact behavior was investigated through simulation study using LS-DYNA finite element analysis (FEA) software. To study the ballistic impact, a steel projectile with a hemispherical penetrating edge at impact velocities of 100 m.s−1, 250 m.s−1, and 350 m.s−1 was considered. Among non-hybrid fabric epoxy composite specimens, Kevlar/epoxy specimen was found to have the highest impact energy absorption followed by carbon/epoxy and glass/epoxy, respectively. Regarding the hybrid fabric epoxy composite specimens, the ones with Kevlar plies in the rear face exhibited better energy absorption compared to other stacking sequences. The non-hybrid glass/epoxy specimen had the lowest energy absorption and highest post-impact residual velocity of projectile among all specimens. From the FEA results, it was noted that impact resistance of hybrid composites improved when Kevlar fabric was placed in the rear layer. Thus, the stacking sequence was observed to be of substantial importance in the development of fabric-reinforced composite laminates for high-velocity impact applications.

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Section: Fiber and Voids Contentsupporting

confidence: 87%

High-velocity impact behavior of hybrid fiber-reinforced epoxy composites

Stephen

Shivamurthy

Mourad

et al. 2021

J Braz. Soc. Mech. Sci. Eng.

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“…The mechanical properties of the bare bi-axial GFRP composite was less than the Mg based FML. 29 The bare bi-axial GFRP composite failure modes have been studied using optical metrology and ultrasonic C-scan techniques. 30 Various stages are shown in Figure 2 that describes the failure behaviour of the FML.…”

Section: Resultsmentioning

confidence: 99%

Tribo-mechanical analysis of magnesium-based fibre metal laminates for structural applications

Priya

Arputham

2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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Fibre metal laminates (FML) play a significant role in the aircraft industry. The present work is to achieve a high load bearing structure and wear resistant FML for airbus cargo floors and doors. An innovative attempt has been made to reveal the mechanical and tribological properties of the FML (Glass/AZ91D/Glass). The glass fibre used is of bi-diagonal fabric to enhance the shear properties of the FML. The laminates were prepared by hand layup technique, which was post compressed to a uniform shape in the compression moulding machine. Mechanical tests such as tensile, flexural, and low-velocity impact were conducted on the FML samples. The mechanical properties of the magnesium-based FML exhibit an excellent tensile strength of 227.3 MPa, the flexural strength of 231.3 MPa, and the energy absorbed by the plate are 93.648 J. These results were promising, and comparatively better than the conventional laminates in the case of load bearing structures. The wear was tested in Pin-on-Disc and the wear resistance was also found to be better than conventional laminates. The micro-structural analysis along the wear regime shows a prominent wear resistance and fewer cracks, due to the presence of AZ91D in the laminates.

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“…The pristine epoxy sample has a high strain of failure. [46] The UTM of the SCF1 sample is slightly reduced compared to the pristine epoxy sample. Whereas, a further increase in SCF to 5 wt% enhanced the ultimate tensile strength required for the sample fracture.…”

Section: Emi Shieldingmentioning

confidence: 96%

Investigation on the enhancement of electromagnetic shielding with efficient use of short carbon fiber in MWCNT‐epoxy nanocomposites

et al. 2022

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The electromagnetic interference (EMI) shielding effectiveness of the epoxy polymer composite reinforced with carbon fiber mat (CFM), short carbon fiber (SCF), and multi‐walled carbon nanotube (MWCNT) is studied in the X‐band (8–12 GHz). Single‐layer unidirectional CFM of 30 wt% epoxy composite with 0° and 90° orientations resulted in EMI shielding of 5 dB and 29.6 dB, respectively. To avoid the influence of CFM orientation on the EMI shielding, SCF of distinct weight percentages (1 and 5 wt%) with fixed weight percentage (1 wt%) of MWCNT are reinforced into epoxy matrix. The EMI shielding provided by 2 mm thick epoxy composite reinforced with 5 wt% SCF along with 1 wt% MWCNT (CNT‐SCF5) is 35.4 dB. The microstructural study revealed uniform dispersion and better adhesion of MWCNT and SCF in the epoxy matrix. The dielectric properties of the fabricated samples indicated an increase in permittivity, electrical tanδ, and conductivity with the grading of SCF and MWCNT. The mechanical properties such as tensile strength and strain of the CNT‐SCF5 showed an increment in ultimate tensile strength and Young's modulus. The homogeneous CNT‐SCF5 epoxy composite with enhanced EMI shielding ability and mechanical properties could be utilized as an efficient EMI shielding material.

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Enhancement of bi-axial glass fibre reinforced polymer composite with graphene platelet nanopowder modifies epoxy resin

Cited by 29 publications

References 25 publications

High-velocity impact behavior of hybrid fiber-reinforced epoxy composites

High-velocity impact behavior of hybrid fiber-reinforced epoxy composites

Tribo-mechanical analysis of magnesium-based fibre metal laminates for structural applications

Investigation on the enhancement of electromagnetic shielding with efficient use of short carbon fiber in MWCNT‐epoxy nanocomposites

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