MWCNT and nano-silica hybrids effect on mechanical and fracture characterization of single lap joints of GFRP plates

Özbek, Özkan; Çakır, Mehmet Veysel

doi:10.1016/j.ijadhadh.2022.103159

Cited by 33 publications

(10 citation statements)

References 29 publications

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“…Also, Figure 3C displays the fabricated samples of three-point bending test specimens. In this investigation, 44 GFRP G10-FR4, Epoxy Araldite 2014-2/A, and hardener Araldite 2014-2/B were employed in a secondary bonding method. A mixing ratio of 100:50 parts was employed.…”

Section: Fabrication Methods Of a CC Single Slj Specimen For The Shea...mentioning

confidence: 99%

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Enhancing shear and flexural strength of single lap composite joints with a graphene nanoparticle‐reinforced adhesive through a co‐curing technique

Venugopal,

Sudhagar P

2023

Polymer Composites

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Adhesive‐bonded joints in glass fiber‐reinforced polymer (GFRP) composite structures give numerous benefits, such as greater flexibility, good specific strength, improved fatigue resistance, and the ability to reduce stress concentration. Consequently, adhesive‐bonded joints are considered more influential if compared to fasteners. This research investigates the effects of incorporating graphene nanoparticles (GNPs) into the adhesive layer on several aspects of adhesively bonded co‐cure (CC) single‐lap GFRP composite joints. These aspects include shear strength, flexural strength, failure mechanisms, and fractography studies. The study examined six distinct weight percentages of GNP, specifically 0.25, 0.50, 0.75, 1.0, 1.25, and 1.5 wt.%, which are considered to enhance the interfacial strength of adhesive joints. Based on the research, 0.75 wt.% of GNP single‐lap joint (SLJ) shear strength improved by 69.40% when compared to the plain matrix SLJ. This suggests excellent load transmission between adherends. In addition, the flexural strength increased by 46.57% in the specimens containing 1.25 wt.% GNP when compared to the plain matrix used to bond in SLJ. After testing, fractured specimen microscopic images were used to examine failure mechanisms. According to fractography studies, adding GNPs to the adhesive causes surfaces to become rougher, which improves the adhesion between the adhesive and the adherends.Highlights Six distinct wt.% of GNPs were used to prepare the matrix by sonication. Single‐lap GFRP composite joints were fabricated through a CC technique. SLJ's maximum shear strength was found at 0.75 wt% of GNP. SLJ's maximum flexural strength was found at 1.25 wt% of GNP. Failure analysis was conducted using microscopes and FESEM images.

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Section: Fabrication Methods Of a CC Single Slj Specimen For The Shea...mentioning

confidence: 99%

“…In this investigation, 44 GFRP G10‐FR4, Epoxy Araldite 2014‐2/A, and hardener Araldite 2014‐2/B were employed in a secondary bonding method. A mixing ratio of 100:50 parts was employed.…”

Section: Comparison Of the Shear And Flexural Strength From Previous ...mentioning

confidence: 99%

Enhancing shear and flexural strength of single lap composite joints with a graphene nanoparticle‐reinforced adhesive through a co‐curing technique

Venugopal,

Sudhagar P

2023

Polymer Composites

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“…Composites have been preferred in aerospace, naval applications, or academic studies, owing to their superior and privileged properties, design flexibility, and ease of production. [1][2][3] Although it has superior properties, this innovative material class shows different mechanical properties, especially in non-dry environments. Determining the durability of composite materials when exposed to water/moisture or after being kept in different environments is extremely important in terms of learning the mechanical properties of the materials.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An experimental study on the hydrothermal aging effect on the free vibration properties of hybrid aramid/glass/epoxy composites: Comparison of sea water and distilled water

Doğan,

Oğuz,

Erkliğ

2023

Polymer Composites

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The purpose of this experimental work is to investigate the impact of hydrothermal aging on the viscoelastic characteristics of hybrid aramid/glass/epoxy composites. In addition to the hybrid composites prepared by vacuum infusion method in two different hybrid configurations ([G3A3]S, [A3G3]S) and two non‐hybrid composite groups ([G6]S, [A6]S) were included for comparison purposes. Composite samples were kept in 4 different aging environments (distilled water 25°C, distilled water 70°C, seawater 25°C, and seawater 70°C) for 6 weeks. To assess the dynamic properties (natural frequency and damping ratio) of composites, a free vibration test was conducted. The vibration test results of the samples were calculated by the half‐power bandwidth method. The results revealed that hydrothermal aging did not have serious effects on first‐mode natural frequency. It was observed that the damping ratios of hybrid composites increased after hydrothermal aging when compared with unaged samples. The results from dynamic aspects like the storage modulus and loss modulus were consistent among themselves. The parameters of the storage modulus and loss modulus have both decreased as a result of hydrothermal aging. In addition, the results proved that the rise in temperature accelerated the degradation in mechanically deteriorated composite materials. It was also found that aging in seawater was induced to more deterioration of hybrid and non‐hybrid composite materials.Highlights The order of the fabrics play an important role in free vibration properties of hybrid composites. Aging hybrid composites at different temperatures affects their free vibration properties. and values decreased more as the temperature increased. Hydrothermal aging has increased the dumping ratio values of composite materials.

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“…57 On the other hand, the hybridization term could also be used for matrix modification with different nanoparticles. [58][59][60] This research critically examines the combined effect of fiber hybridization and matrix modification on the tensile, flexural, and impact performance of the hybrid glass/carbon composites. The "hybrid effect" phenomenon was also investigated from the standpoint of MWCNTs' contribution.…”

Section: Introductionmentioning

confidence: 99%

Combined effect of fiber hybridization and matrix modification on mechanical properties of polymer composites

Demir

Yar

Eskizeybek

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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Glass/carbon fiber reinforced hybrid composites are great candidates for wind turbine blade manufacturers to make larger blades. Variation of stacking sequences ensures design freedom to the composite engineers to optimize the composite structure's mechanical performance. On the other hand, matrix modification of polymer composites with nanoparticles is also of interest to introduce multifunctional properties. This research aims to scrutinize the influence of simultaneous fiber hybridization and matrix modification on polymer composites’ tensile, flexural, and low-velocity impact properties. Hybrid glass/carbon epoxy composites and hybrid glass/carbon/multi-walled carbon nanotube (MWCNT) multiscale polymer composites of stacking sequences [GCGCGC]S, [CGCGCG]S, and [G6C6] were manufactured. Fiber hybridization dramatically improved tensile strength between 51% and 76% compared to glass fiber composite. Depending on the stacking sequence, the flexural strength of the hybrid composites was improved between 10% and 16% concerning carbon fiber composite. With the introduction of MWCNTs, a slight increase in the tensile strength for unsymmetrical hybrid composites by around 5% and decreases by 7% for symmetrical ones were observed. Similar behavior was seen for bending characteristics. Additionally, low-velocity impact tests showed that it is achievable to bring greater impact peak forces up to 70% for hybrid composites than carbon fiber epoxy composites. MWCNTs modification of the matrix restrained the impact damage propagation, as proved by C-scan analysis.

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MWCNT and nano-silica hybrids effect on mechanical and fracture characterization of single lap joints of GFRP plates

Cited by 33 publications

References 29 publications

Enhancing shear and flexural strength of single lap composite joints with a graphene nanoparticle‐reinforced adhesive through a co‐curing technique

Enhancing shear and flexural strength of single lap composite joints with a graphene nanoparticle‐reinforced adhesive through a co‐curing technique

An experimental study on the hydrothermal aging effect on the free vibration properties of hybrid aramid/glass/epoxy composites: Comparison of sea water and distilled water

Combined effect of fiber hybridization and matrix modification on mechanical properties of polymer composites

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