An approach to evaluate delamination factor when drilling carbon fiber-reinforced plastics using different drill geometries: experiment and finite element study

Al-wandi, Sinan; Ding, Songlin; Mo, John P.T.

doi:10.1007/s00170-017-0880-2

Cited by 52 publications

(15 citation statements)

References 30 publications

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“…Due to this sole reason the drilling operation induces surface damages into these structural members. Drilling-induced delamination is one of the most challenging failure mode resulting in heavy losses in the aerospace industry (Al-wandi et al, 2017;Fleischer et al, 2018;. Rejection of parts are as high as 60% due to the drilling-induced delamination caused in the composite laminates during the final assembly (Stone & Krishnamurthy, 1996;Wong, 1981).…”

Section: Drilling Of Compositesmentioning

confidence: 99%

A review on strengthening, delamination formation and suppression techniques during drilling of CFRP composites

Rathod

Patel

et al. 2021

Cogent Engineering

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Carbon fiber-reinforced composite laminates are progressively appealing for several applications in various manufacturing sectors such as aeronautical and automobile, because of their amazingly predominant mechanical properties. This has subsequently led to an increase in research of various machinability techniques emphasizing on both conventional and non-conventional methods. Typically, conventional drilling is one of the most significant machining processes for most kinds of fiber composite laminates. The most unsolicited damage termed as delamination during drilling has recently become one of the most influential research subjects as numerous engineers in manufacturing sector have been trying to prevent this problem over decades. This review paper briefly discusses about the incorporation of different types of fillers in carbon fiber-reinforced composites. The paper also summarizes the steady progress in drilling-induced delamination of carbon fiber laminates. It covers the delamination formation mechanism, delamination suppression strategies, and the optimization of various drilling parameters to reduce the delamination damage. The present article provides researchers an opportunity to deepen their knowledge on specific aspects by exploring different methods for reducing delamination in CFRP composites.

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Section: Drilling Of Compositesmentioning

confidence: 99%

A review on strengthening, delamination formation and suppression techniques during drilling of CFRP composites

Rathod

Patel

et al. 2021

Cogent Engineering

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“…27 Especially, minimum point angle and low helix angle influences greatly the delamination effects and to get quality hole entrance when drilling CFRP. 28…”

Section: Effect Of Tool Geometry and Materialsmentioning

confidence: 99%

Review on the methodologies adopted to minimize the material damages in drilling of carbon fiber reinforced plastic composites

John

Kumaran

Kurniawan

et al. 2018

Journal of Reinforced Plastics and Composites

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The applications of carbon fiber reinforced plastic materials have increased widely in the fields of aerospace, automotive, maritime, and sports equipment because of their excellent mechanical properties. Machining of carbon fiber reinforced plastics has a considerably more complex effect on drilling qualities than machining of conventional metals and their alloys due to the nonlinear, inhomogeneous, and abrasive nature of CFRPs. This article addresses the methodologies that have been adopted to minimize the material damages in drilling of polymeric composite materials. Key papers are reviewed with respect to tool types, materials, geometry and coatings, back-up plate, coolants, environment, unconventional machining, and high-speed drilling methodologies, which influence the hole qualities of delamination, burr, surface roughness, cylindricity, diameter error, and thermal damage with the effect of cutting variables (spindle speed and feed rate). In addition, some deburring strategies are also reviewed and discussed.

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“…In case improper machining technology is applied when machining CFRPs, many micro-and macro-geometrical damages can be generated easily: such damages include delamination [6,7,[14][15][16][17][18][19][20][21][22][23][24], uncut fibres and pull-outs [13,[25][26][27][28][29][30][31] as well as microcracks on the machined surfaces [30,[32][33][34]. In order to minimize the above-listed damages, there are many process and technological parameters that have to be optimized including (i) the geometry and coating of the cutting tool [18,33]; (ii) the cutting speed, feed rate and the depth of cut [7,18,35]; (iii) the tool path [7,13,32]; (iv) the cooling [36][37][38][39]; and (v) the type of support plate [40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of wobble milling, helical milling and conventional drilling of CFRPs

Pereszlai

Geier

2020

Int J Adv Manuf Technol

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Due to its excellent specific mechanical properties, carbon fibre-reinforced polymer (CFRP) composite is a widely used structural material in the aerospace industry. However, this material is difficult to cut, mainly due to its inhomogeneity and anisotropic features and because of the strong wear effects of its carbon fibres. In the scope of aerospace industrial uses of this material, thousands of holes have to be machined for purposes of assembly. Nevertheless, conventional drilling technologyeven if special drilling tools are usedis only moderately able to manufacture good quality holes. Wobble milling is a novel advanced hole-making technology, which has been developed to minimize machining-induced geometrical defects like delamination or uncut fibres. The main objective of the present paper is to compare wobble milling, helical milling and conventional drilling technologies concerning unidirectional CFRPs. In addition, the kinematics of wobble milling technology is discussed in detail. In the scope of this paper, numerous machining experiments were conducted in unidirectional CFRPs: herein the impact of the type of cutting tool and of process parameters on the quality of machined holes are analysed and discussed (diameter of holes, circularity error and characteristics of uncut fibres). During these investigations, experimental data were evaluated with the help of digital image processing (DIP) and with the help of analysis of variance (ANOVA) techniques. Experimental results show that the amount of uncut fibres can significantly be minimized through the application of wobble milling technology.

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An approach to evaluate delamination factor when drilling carbon fiber-reinforced plastics using different drill geometries: experiment and finite element study

Cited by 52 publications

References 30 publications

A review on strengthening, delamination formation and suppression techniques during drilling of CFRP composites

A review on strengthening, delamination formation and suppression techniques during drilling of CFRP composites

Review on the methodologies adopted to minimize the material damages in drilling of carbon fiber reinforced plastic composites

Comparative analysis of wobble milling, helical milling and conventional drilling of CFRPs

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