Enhancing shear strength in <scp>3D</scp> printed single lap composite joints: A multi‐faceted exploration of <scp>GNP</scp> integration, print orientation, utilizing artificial neural networks, and dynamic analysis

Hiremath, Vinayak S.; Reddy, Mallikarjuna D.; Reddy, Rajasekhara Mutra; Naveen, J.; Chand, R. Prem

doi:10.1002/app.55469

Cited by 5 publications

(1 citation statement)

References 32 publications

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“…Post-processing techniques for improving the surface characteristics and mechanical properties of FDM-printed parts can be broadly classified into mechanical, chemical, and thermal treatments, each with its own advantages and limitations. Mechanical post-processing, such as sanding, polishing, and abrasive flow machining, involves physical removal of surface irregularities using abrasive tools or media [18,19]. Although these techniques can effectively reduce surface roughness, they are often timeconsuming, labor-intensive, and may cause damage to delicate features.…”

Section: Introductionmentioning

confidence: 99%

Effects of liquid lubricants on the surface characteristics of 3D-printed polylactic acid

Kim,

Lee,

Kim

2024

Smart Mater. Struct.

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In this study, 3D-printed Polylactic acid (PLA) specimens were manufactured and polished using various lubricants to assess their surface, friction, and wear characteristics. After polishing, the surface roughness decreased by approximately 80% compared with that before polishing, except when acetone was used as the lubricant. In particular, under deionized (DI) water and acetone lubrication conditions, the friction coefficient decreased by 63% and 70%, respectively, whereas the specific wear rate decreased by 88% and 83%, respectively, compared with the unpolished specimens. In the case of dry polishing, adhesion, friction, and wear increase owing to surface damage. Ethanol and IPA polishing resulted in hydrolysis and increased friction, but slightly decreased wear rates. The surface of the specimen polished with acetone dissolved and became very rough. Only the surface polished with DI water exhibited hydrophobic properties. When acetone and DI water were used as lubricants, the surface adhesion force, adhesion energy, friction coefficient, and wear rate were lowest. The finite element analysis results showed that the polished surface exhibited stable contact pressure and friction force, while the unpolished surface showed large fluctuations in contact pressure and friction force owing to the laminated pattern. These results suggest that the polishing process is crucial for improving the surface characteristics and mechanical performance of 3D-printed PLA parts.

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Section: Introductionmentioning

confidence: 99%

Effects of liquid lubricants on the surface characteristics of 3D-printed polylactic acid

Kim,

Lee,

Kim

2024

Smart Mater. Struct.

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Analysis on the effect of sodium hydroxide treatment and graphene nano‐particle reinforcement on the shear behavior and modal analysis of glass fibre reinforced polymer flat‐joggle‐flat composite joints

Hiremath,

Reddy,

Palaniappan

et al. 2024

Polymer Composites

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The use of composite materials, particularly glass fiber‐reinforced polymers (GFRP), has considerably increased. The present investigation seeks to ascertain how sodium hydroxide (NaOH) treatments and the incorporation of graphene nano‐particulates (GNP) in GFRP flat‐joggle‐flat (FJF) composite joints. The experiments demonstrated that surface treatment with 0.1 N NaOH and the addition of 0.25, 0.50, and 0.75 wt% GNP reinforcement to the resin considerably enhanced the shear behavior of the FJF joints by 5.48%, 16.04%, and 32.77%, respectively, as compared to plain GFRP specimens, due to the improved chemical bonding and excellent IR radiation retention. 0.2 N NaOH treated with the same GNP concentrations lowered the shear strength compared to 0.1 N NaOH due to the linear reduction in fiber size. Field emission scanning electron microscopy gives a clear failure analysis of the FJF joint specimens. Fourier transform infrared spectroscopy investigation determines the chemical structure of GFRP materials based on distinctive peak intensities in the infrared range and different functional groups contained in the composite materials. Atomic force microscopy testing was done to evaluate the surface textures. The vibration analysis firm that the FJF joint having 0.1 N NaOH with 0.75 wt% of graphene had the highest natural frequency.Highlights The effect of NaOH treatment and graphene influence on FJF joints. Shear analysis of the FJF composite joints. FTIR and AFM techniques were adopted to analyze the surface properties. Modal analysis is used to evaluate the natural frequencies.

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Enhanced flexural and vibration behavior of interleaved CFRP composite joints with modified multiwalled carbon nanotube adhesives for aerospace and aircraft applications

Karthikeyan,

Naveen

2024

Polymer Composites

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Cocured bonding and geometric modification are prominent techniques for fusing structural components in aerospace and aircraft applications. This research involved the fabrication of carbon fiber‐reinforced polymeric (CFRP) adhesive‐bonded joints utilizing novel cocuring with interleaved lamination (IL‐CC) joining techniques with multiwalled carbon nanotubes (MWCNTs) modified epoxy adhesive. Additionally, the study examined the flexural and vibration characteristics of IL‐CC CFRP composite joints. The result findings 1.0 wt% MWCNTs in epoxy adhesive had the best flexural strength and modulus, 78% and 32% higher than the pure epoxy adhesive. Additionally, the IL‐CC CFRP composite joints exhibit a 285% higher flexural strength and a 47% higher modulus than the neat CC CFRP composite joints. Nevertheless, the nanofiller with a wt% of 0.25 demonstrated the highest natural frequency across three different vibration modes, which are 14%, 21%, and 25% higher than pure epoxy adhesive. An ANOVA showed that MWCNT concentrations significantly influenced performance. Using the Levenberg–Marquardt algorithm, an artificial neural network predicted results. The overall coefficient (R) mean square error of 0.99627 is satisfactory, indicating that both outcomes are dependable and in good agreement. The results imply that IL‐CC CFRP composite joints could be used in aerospace and aircraft parts.Highlights The IL‐CC CFRP SLJs were fabricated with MWCNT‐modified adhesive. Attained the maximum flexural strength is 1.0 wt% MWCNT. Attained the maximum natural frequency is 0.25 wt% MWCNT. Statistics were analyzed using a one‐way ANOVA technique. An ANN predicts the flexural and dynamic behavior of IL‐CC CFRP SLJs.

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Enhancing shear strength in 3D printed single lap composite joints: A multi‐faceted exploration of GNP integration, print orientation, utilizing artificial neural networks, and dynamic analysis

Cited by 5 publications

References 32 publications

Effects of liquid lubricants on the surface characteristics of 3D-printed polylactic acid

Effects of liquid lubricants on the surface characteristics of 3D-printed polylactic acid

Analysis on the effect of sodium hydroxide treatment and graphene nano‐particle reinforcement on the shear behavior and modal analysis of glass fibre reinforced polymer flat‐joggle‐flat composite joints

Enhanced flexural and vibration behavior of interleaved CFRP composite joints with modified multiwalled carbon nanotube adhesives for aerospace and aircraft applications

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