Processing Of Glass Fiber Pultruded Composites Using Graphene Nanoplatelets Modified Epoxy Matrix

Ojha, Mihir; Penumakala, Pavan Kumar; Marrivada, Gayatri Vineela; Chaganti, Phaneendra Kiran; Gupta, Amit Kumar

doi:10.1016/j.matpr.2019.07.237

Cited by 11 publications

(5 citation statements)

References 5 publications

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“…[ 5 ] However, the reinforcement/polymer matrix interfacial characteristics play a significant role in determining the final properties. [ 6‐9 ] Therefore, it is still a challenge to print composite parts with enhanced properties.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and electrical properties of three‐dimensional printed polylactic acid–graphene–carbon nanofiber composites

2021

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The addition of carbon nanofibers (CNFs) and graphene to thermoplastic polymers has the potential to increase the mechanical and electrical properties. The aim of the current study is to investigate the effect of CNF and graphene on the properties of three‐dimensional (3D) printed polylactic acid (PLA) samples. The samples are printed using the PLA–graphene–CNF composite filament via fused deposition modeling. As a first objective, composite filament and pure PLA filament characteristics were compared using tensile, scanning electron microscopy and thermogravimetric analysis (TGA) data. Compared with pure PLA filaments, composite filaments revealed an almost 28% reduction in tensile strength due to interfacial defects (poor bonding between PLA and graphene and CNF). Furthermore, 3D printed composite sample properties are compared with 3D printed pure PLA sample using tensile and electrical conductivity data. The 3D printed composite samples also showed less tensile strength (25 MPa) compared with pure PLA 3D samples (37–47 MPa) due to the presence of microvoids. These voids also caused reduction in tensile strength and electrical conductivity of 3D printed composites when compared with the filament properties. The effect of layer orientation was also studied by printing samples at [0°/90°] and [45°/−45°] orientations and found that samples with [45°/−45°] orientation revealed higher elongation (>100%) and lower electrical conductivity. It is observed that the presence of graphene and lack of bonding between PLA and CNF resulted in the improper fusion of the printed layers, which led to a decrease in tensile strength and electrical conductivity but an increase in toughness.

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Section: Introductionmentioning

confidence: 99%

Mechanical and electrical properties of three‐dimensional printed polylactic acid–graphene–carbon nanofiber composites

2021

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“…In recent times, the use of graphene as a filler material is increasing. [7][8][9][10][11][12][13][14][15][16][17][18] Graphene is a two-dimensional material that exhibits excellent mechanical properties such as a high Young's modulus of 1 TPa and yield strength of 130 GPa (for a pristine, single-layer sheet). 19 Depending on the processing route, lateral dimensions and the number of layers, graphene-based materials are termed as graphene oxide (GO), reduced graphene oxide (rGO), few-layer graphene, or multilayer graphene.…”

Section: Introductionmentioning

confidence: 99%

Mechanical response of reduced graphene oxide (rGO) reinforced epoxy adhesive joints

Vuppuluri,

Penumakala,

Subramanyam

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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The present work aims at investigating the effect of adhesive modification on the lap shear strength of the adhesively bonded joints. The epoxy-based adhesive is reinforced with reduced graphene oxide (rGO) at different weight fractions. Single lap joints (SLJ) have been prepared by considering the commercially available aerospace-grade aluminum alloy AA8011 as the adherend material and Araldite 2014 A/B as the adhesive. Experiments showed that the addition of 0.5 wt.% graphene to the epoxy adhesive resulted an approximately 27% increase in the lap shear strength of the SLJ. Further increase in the reinforcement loading decreases the lap shear strength due to the agglomeration of graphene particles. A detailed analysis of the effect of reinforcement loading and overlap length on the shear strength has been presented and failure mechanisms are discussed.

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“…Srivastava et al 48 improved the flexural strength of carbon fiber epoxy composites by coating GNP on the fibers which leads the development of a continuous interphase between the fiber and the epoxy. Ojha et al 49 subjected the glass fiber-reinforced composite containing GNP to a tensile test in order to investigate the tensile strength of the composite. They observed that failure of the composite occurs through the damage initiation and its growth in the matrix and the sample has been cut from the unidirectional pultruded composite under tensile test, and found out that the addition of 0.1 wt.% GNP in the resin can increase tensile strength by 12% and the longitudinal modulus of the composite by 7%.…”

Section: Introductionmentioning

confidence: 99%

Effect of graphene nano-additives on the fatigue limit of fiber-reinforced polymer hybrid composites—A micromechanical modeling procedure

Rahnama,

Ansari,

Hassanzadeh-Aghdam

2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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In this article, the effect of graphene nanoadditives on the fatigue limit of unidirectional glass fiber-reinforced polymer (GFRP) composites has been investigated. A micromechanical model based on the crack growth has been used to analyze the fatigue limit response of unidirectional GFRP hybrid composite containing nanoadditives. The influence of different percentages of graphene nanosheets (GNS) and different types of nanofiller dispersion has been investigated by the micromechanical model. The fatigue limit of unidirectional GFRP hybrid composites has been plotted in terms of glass fiber volume fraction, interfacial friction shear stress, interfacial fracture energy and reference length. The fatigue limit of unidirectional composites can be improved by addition of GNS into the polymer matrix of such composite systems. The obtained results on the GNS dispersion type demonstrate that the uniform dispersion of GNS into the polymer matrix increases the fatigue limit of unidirectional GFRP hybrid composites. As the agglomeration density of GNS is low, the fatigue limit of GFRP hybrid composites will be improved more than when the density of agglomeration is high.

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Processing Of Glass Fiber Pultruded Composites Using Graphene Nanoplatelets Modified Epoxy Matrix

Cited by 11 publications

References 5 publications

Mechanical and electrical properties of three‐dimensional printed polylactic acid–graphene–carbon nanofiber composites

Mechanical and electrical properties of three‐dimensional printed polylactic acid–graphene–carbon nanofiber composites

Mechanical response of reduced graphene oxide (rGO) reinforced epoxy adhesive joints

Effect of graphene nano-additives on the fatigue limit of fiber-reinforced polymer hybrid composites—A micromechanical modeling procedure

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