Experimental investigation and mathematical modelling of drilling on GFRP composites

Sureshkumar, M. S.; Lakshmanan, D.; Murugarajan, A.

doi:10.1179/1432891713z.000000000361

Cited by 16 publications

(5 citation statements)

References 9 publications

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“…Ranganathan et al [41] found that the feed rate had more than three times the effect of cutting speed on the cutting forces, surface roughness and delamination. Similar results were also reported by Işık et al [34] and Kilickap [37] and Sarma et al [42] and Sureshkumar et al [43]. Işık et al [34] reported that increasing the number of drill flutes and point angle increased the delamination factor at the exit which was mainly due to increased chip load.…”

Section: Introductionsupporting

confidence: 83%

“…Kim et al [52] reported that carbide drills produced oversized holes, while undersized holes were produced when using HSS drills. Sureshkumar et al [43] found that the hole circularity and delamination increased with the feed rate increase. Vankanti et al [30] also found that increasing cutting tool geometry such as its chisel edge and point angle in addition to the feed rate significantly increased hole circularity.…”

Section: Introductionmentioning

confidence: 99%

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The effect of cryogenic machining of S2 glass fibre composite on the hole form and dimensional tolerances

Köklü

Morkavuk

Featherston

et al. 2021

Int J Adv Manuf Technol

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S2 glass fibre reinforced epoxy composites are widely used in aeronautical applications owing to their excellent strength to weight ratio. Drilling glass fibres can be cumbersome due to their abrasive nature and poor thermal conductivity. Moreover, the use of conventional coolants is not desirable due to contamination and additional costs for cleaning the machine part. An alternative is to use environmentally friendly coolants such as liquid nitrogen (LN2) which have been previously employed in machining metals and composites. The current study investigates the effect of drilling S2 glass fibre composite in a bath of LN2. The study aims to evaluate the effect of spindle speed, feed rate and the presence of cryogenic cooling on the form and dimensional tolerances of the hole (hole size, circularity, cylindricity and perpendicularity). Design of experiments and analysis of variance (ANOVA) were used to determine the contribution of the input parameters on the analysed hole quality metrics. Results indicated that drilling S2 glass fibre in a cryogenic bath increased hole size significantly beyond the nominal hole diameter. The hole circularity and cylindricity were reduced compared to holes drilled under dry condition under all cutting parameters due to enhanced thermal stability during the drilling process. The current study aims to provide the scientific and industrial communities with the necessary knowledge on whether cryogenic bath cooling strategy provides better hole quality output compared to dry drilling and other cryogenic cooling strategies which were previously reported in the open literature.

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Section: Introductionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

The effect of cryogenic machining of S2 glass fibre composite on the hole form and dimensional tolerances

Köklü

Morkavuk

Featherston

et al. 2021

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…(8) and (9), a constant dimensionless slip parameter a, which governs the mold-material interface slip process, is determined for the flow rate field, its range being from 0 to ¥. If a = 0, a simple expanding flow occurs with the same flow front as the one predicted by the generalized Hele-Shaw (GHS) model.…”

Section: Governing Equationmentioning

confidence: 99%

“…To define the flow rate distribution of GFRP composite in the mold, the solution of governing equations (7), (8), and (9) needs to be derived using the boundary element method or FEM numerical analysis. In this study, FEM method is used to derive the solution, and the above governing equations are converted to the weighted residual equation using the Galerkin approach.…”

Section: Finite Element Formulationmentioning

confidence: 99%

Study on Compression Molding of an Intercrossed Prepreg Glass Fiber-Reinforced Plastic

Kim

2016

Strength Mater

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In this paper, a specimen of 80´80´3.8 mm dimensions is cut out from the prepreg intercrossed glass fiber-reinforced plastic (GFRP) and subjected to hot compression molding. The experimental flow front of the specimen is compared to the one predicted by the finite element method (FEM) based on the Galerkin method. Since the prepreg intercrossed GFRP composite is made of stacking plain weaved prepregs, the fibers' entanglement prevents the specimen slip across the mold surface. It is shown that the flow results are strongly affected by the mold-specimen friction: the slip parameter a = 100 used in the FEM flow analysis provides a close correlation of the calculated and experimental results.

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“…Palanikumar 29 developed a model to correlate the surface roughness and machining parameters in the drilling of GFRP composite and accordingly observed the effect of the cutting parameters on drilling. Sureshkumar et al 30 developed a mathematical model for drilling into GFRP composites using full-factorial method and ANOVA. Their objective was to correlate the experiment results with general predictions.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation and modelling of drilling on multi-wall carbon nanotube–embedded epoxy/glass fabric polymeric nanocomposites

Singh

Kumar

2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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The primary objective of this research is to investigate the effect of multi-wall carbon nanotubes on drilling of multi-wall carbon nanotube–embedded epoxy/glass fabric polymeric nanocomposites. The experiments were conducted on composites with varying the weight percentage of multi-wall carbon nanotubes content to analyse drilling-induced delamination and surface roughness, which affect the quality and property of the drilled holes. The drilling parameters considered are spindle speed, feed rate and drill diameter. The microstructure of the holes was characterized using field emission scanning electron microscopy methods. For correlating the effect of the weight percentage of carbon nanotubes with the referred drilling parameters, a mathematical model was used, based on response surface methodology. For development of the mathematical model, four factors, namely, spindle speed, feed rate, diameter of drill and weight percentage of carbon nanotubes, were taken into account. The result established that delamination and surface roughness are reduced as multi-wall carbon nanotubes’ content increases. Maximum improvement in delamination factor was observed in the case of 1.0 wt% multi-wall carbon nanotube–embedded epoxy/glass fabric polymeric nanocomposite, which is 25% and 31.09% at the entrance and exit sides of the hole, respectively. With an increase in the feed rate and the drill diameter, delamination factor increases; however, with an increase in spindle speed, delamination factor decreases. Lower value of surface roughness (1.113 µm) was observed in 1.5 wt% of multi-wall carbon nanotube–embedded epoxy/glass fabric polymeric nanocomposite. However, surface roughness increases with an increase in feed rate and drill diameter.

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Experimental investigation and mathematical modelling of drilling on GFRP composites

Cited by 16 publications

References 9 publications

The effect of cryogenic machining of S2 glass fibre composite on the hole form and dimensional tolerances

The effect of cryogenic machining of S2 glass fibre composite on the hole form and dimensional tolerances

Study on Compression Molding of an Intercrossed Prepreg Glass Fiber-Reinforced Plastic

Experimental investigation and modelling of drilling on multi-wall carbon nanotube–embedded epoxy/glass fabric polymeric nanocomposites

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