Mechanism of damage generation during drilling of carbon/epoxy composites and titanium alloy stacks

Wang, Ben; Gao, Hang; Cao, Bo; Zhuang, Yuan; Zhao, Zhe

doi:10.1177/0954405413508117

Cited by 41 publications

(32 citation statements)

References 40 publications

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“…There are damages caused on the drilled composite materials as a result of their composition such as delamination, hole dimensional inaccuracy, surface roughness, fuzzing and composite fibre pull-out or uncut fibres. 99,104,105 The damaged composite materials are susceptible to fatigue strength and load bearing capacity. 105 Problems associated with drilling of CFRC laminate materials Kim and Ramulu 47 reported that for years, carbon fibre composites have been drilled using the same methods applied in drilling metals.…”

Section: Composition Of Carbon Fibre Compositesmentioning

confidence: 99%

“…106 Among these, delamination is the most critical defect as it has the highest level of impact on accuracy and quality of a drilled hole. 54,105 Delamination Delamination in a composite material occurs whereby reinforced fibre plies separate, either by peel-up or push-out phenomenon. This defect occurs at the upper most layer of the laminate from the rest of the body and/or on the drill bit's tip which pushes the bottom layers of the laminate, respectively 77,107 (Figure 7).…”

Section: Composition Of Carbon Fibre Compositesmentioning

confidence: 99%

See 1 more Smart Citation

Recent advances in twist drill design for composite machining: A critical review

Ismail

Dhakal

Dimla

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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In the field of composite technology, inefficient and poor designs of twist drills contribute immensely to the challenges facing drilling of composite materials. An attempt to report some of the drill design methods and their inherent challenges confronting composite machining necessitates the writing of this article. A critical review has been conducted to offer a clear understanding of the current advances in the field of mechanical drilling of composite materials, focusing on geometry, material and parametric tool designs. The inter-dependable effects of thrust force, cutting speed, feed rate, cutting force and torque on drill design are similarly reviewed. This article also reveals other associated issues facing composite drilling including delamination, surface roughness, rapid tool wear and drill breakage. Well-designed drill geometry and good knowledge of drilling parameters afford the producers of polycrystalline diamond, carbide and highspeed steel tooling materials better opportunity of developing a drill that will minimise delamination of the reinforced composites and tool wear and produce a high-quality surface. Twist drill manufacturers and users will benefit from this article as they seek to have well-designed and improved drills.

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Section: Composition Of Carbon Fibre Compositesmentioning

confidence: 99%

Section: Composition Of Carbon Fibre Compositesmentioning

confidence: 99%

Recent advances in twist drill design for composite machining: A critical review

Ismail

Dhakal

Dimla

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…В [12] описана обработка отверстия спиральными сверлами в двухслойном пакете углепластик-титан. Толщина слоя композита составляла 5 мм, титана -4 мм.…”

Section: а) б)unclassified

Increase in efficiency of quality and hole-making in glass-reinforced titanium laminate by reducing drilling vibroactivity

Николаевич

Викторович

Геннадьевич³

2016

Vestnik Donskogo gosudarstvennogo tehničeskogo universiteta

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The work objective is to study the impact of the drill design value and geometrics on the quality of the processed holes, the efficiency, and the machining dynamics of the high-strength polymer composite - fiberglass plastic reinforced by titanium foil. Packs of the reinforcing layers made from the titanium foil or carbon fiber tapes are often used in the highly-loaded polymer composite structures. Processing in several operations and the application of sharp-ground tools provide the required dimensional accuracy, the surface macro- and microgeometry of the hole, and allow avoiding the delamination. The process of drilling fiberglass laminates under different patterns of HSS drills sharpening is studied. The data obtained allow determining the optimum type of instrument and operation mode taking into account the dependence of the high-altitude roughness parameters, the nature and amount of delamination in the entry (exit point) of the drill. The vibroactivity of the drilling process and its relationship with the quality metrics are studied using the computer-aided torque-sensing system. Some proposals for improving the hole-making technology applying to the glass-fiber spars of the main and tail helicopter rotors are developed.

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“…Experimental setup for drilling of CFRP/Ti stacks and cutting tools surface condition: a) Infrared thermal camera and temperature measurement points for CFRP/Ti stacks and b) Titanium alloy adhered to the cutting tool edge) Delme işlemi esnasında KETPK/Ti'nin farklı bölgelerinde oluşan sıcaklıklar, a) A noktası, b) B noktası ve c) C noktası[52] (Temperatures in different areas of CFRP/Ti stacks during drilling: a) A point, b) B point and c) C point) Gr-Bi/Ti istiflenmiş plakaların delinmesi: a) Standart HSS matkaplar için derinliğe bağlı olarak tork ve ilerleme kuvvetindeki değişim (N: 660 dev/dak, f:0,2mm/dev) ve b) HSS kobalt matkap ile delinmiş Gr-Bi/Ti plakaların üstten ve yandan görünüşü(N: 660 dev/dak, f:0,13 mm/dev)[53] (Drilling of Gr-Bi/Ti stack: a) Relationship torque and thrust force depending on depth for standard HSS drills (N:660 rev/min, f:0.2 mm/rev) and b) Top and side view of Gr-Bi/Ti stack drilled by a HSS-Co drill (N:660 rev/min, f:0.13 mm/rev))…”

mentioning

confidence: 99%

“…KETPK/Ti'nin delinmesi için deney düzeneği ve kesici takım yüzey durumu, a) Kızıl ötesi termal kamera ve KETPK/Ti istiflenmiş yapı için sıcaklık ölçüm noktaları ve b) Titanyum alaşımının kesici takım kenarına yapışması[52] …”

unclassified

Elyaf takviyeli polimer kompozit malzemelerin farklı delme yöntemleri ile delinmesinde kesme performansının değerlendirilmesi: Literatür Taraması

Bayraktar¹

2018

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

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• Delamination and surface quality in drilling of fiber reinforced polymer composites. • Effects of cutting parameters, cutting tool material and geometry on the delamination. • Effects of adhesion and abrasive wear mechanisms on the delamination and surface quality. Fiber reinforced polymer composite materials are important for aerospace industry due to their engineering properties. the delamination that occurs during cutting these materials with different cutting methods is adversely affecting engineering properties. This situation is prevalent especially in drilling operations. it has been found that stacking methods have been used in recent years and delamination has been significantly reduced. Therefore, in this study, it was aimed to transfer the findings obtained by researching the innovative studies made in the literature to the readers. Purpose: The aim of this study is to identify the findings obtained from recent studies in the literature. Theory and Methods: In this study, it is aimed to reveal the results obtained from the innovative studies carried out within the scope of the study. Results:I n the industrial applications, especially in aircraft industry, it is necessary to use the optimum cutting speed values in the stacked structures. However, in the case of stacked structures, it is necessary to use the optimum cutting speed values for each material. Ti or Al, FRP's/Ti, FRP's/Ti, FRP's/Ti and FRP's/Al/ FRP's stacked structures are used in the body and wing connections. Due to the adherence of the chips (BUE) to the machined surface and the cutting edge of the cutting tool due to adhesion, micro-level particles broken off from metal and FRP's materials due to the mechanical loads cause abrasive wear on the cutting tool. It has been determined that MQL and spray spray cooling method which can be used with PCBN or PCD tools as well as stepped or small angled point drills to minimize delamination, increase hole quality of metal and FRP's material to cause delamination in FRP's material. Conclusion: It has been determined in the literature that low cutting speeds should be used in combination with high cutting speeds in order to reduce delamination. However, in addition to the cutting parameters, cutting tool geometry, coating method, and material type also have significant impact on cutting performance. It is considered that the abrasive water jet cutting method may be advantageous for metal-stacked ETPK structures in that the drilling of the front hole can reduce the occurrence of delamination particularly in the ETPK layers stacked with metals, thereby reducing the thermal effects that may occur during cutting. In addition, the relationship between the different fiber angles and the surface damage occurring at the cutting surface is of great importance in terms of the effectiveness of the results obtained by performing different statistical modeling studies for estimating the cutting temperatures in different regions as well as delamination, burr formation, cutting force and surface roughness in st...

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Mechanism of damage generation during drilling of carbon/epoxy composites and titanium alloy stacks

Cited by 41 publications

References 40 publications

Recent advances in twist drill design for composite machining: A critical review

Recent advances in twist drill design for composite machining: A critical review

Increase in efficiency of quality and hole-making in glass-reinforced titanium laminate by reducing drilling vibroactivity

Elyaf takviyeli polimer kompozit malzemelerin farklı delme yöntemleri ile delinmesinde kesme performansının değerlendirilmesi: Literatür Taraması

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