Examination and modification of equivalent delamination factor for assessment of high speed drilling

Babu, Jalumedi; Alex, Nevin Paul; Mohan, K.; Philip, Jose; Davim, J. Paulo

doi:10.1007/s12206-016-1034-4

Cited by 22 publications

(9 citation statements)

References 30 publications

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“…95 A number of experiments have been conducted to investigate the effects of major drilling parameters such as feed rate, spindle speed, drill type, and drill bit point angle on delamination during HSD of composite materials with a maximum spindle speed of 40,000 r min −1 . 95 –98 The experimental results have indicated that larger material removal rates are correlated with minimal delamination, irrespective of the feed speed applied and the delamination tendency decreases as the spindle speed elevates. This happens due to the increase in cutting temperature with an increase in spindle speed, thus endorsing the softening of the matrix and inducing less delamination.…”

Section: Machining and Machinability Of Nfrcsmentioning

confidence: 99%

Natural fiber–reinforced composites: A review on material, manufacturing, and machinability

Lotfi

Dao

et al. 2019

Journal of Thermoplastic Composite Materials

309

159

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Interest in natural fiber–reinforced composites (NFRCs) is increasing rapidly thanks to their numerous advantages such as low cost, biodegradability, eco-friendly nature, relatively good mechanical properties, and a growing emphasis on the environmental and sustainability aspects of engineering materials. However, large-scale use of NFRCs is still considered as challenging due to the difficulties in manufacturing, limited knowledge of its machinability and appropriate parameter settings, and being prone to machining-induced defects. This article presents a comprehensive review on various aspects of NFRCs, with a focus on the manufacturing and machinability. It covers some recent works related to NFRCs, including the manufacturing processes and parameters, characterization of mechanical properties, applications, and machinability and machining process monitoring, many for the first time. The main challenges associated with machining of NFRCs and the induced damages are outlined, with special attention paid to the effect of physical properties of the fibers and manufacturing process on the machinability, along with the essential machining parameters that affect the quality of the machined surface. The research perspectives and the current application status are also discussed. The article is intended to help readers attain a fundamental understanding of key technologies and the state of the arts in this research area.

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Section: Machining and Machinability Of Nfrcsmentioning

confidence: 99%

Natural fiber–reinforced composites: A review on material, manufacturing, and machinability

Lotfi

Dao

et al. 2019

Journal of Thermoplastic Composite Materials

309

159

View full text Add to dashboard Cite

show abstract

“…Several delamination factors have been developed by various researchers as the index of delamination for comparison and evaluation of delamination in composite materials. 6–8 Delamination seems to mainly depend upon thrust force generated during the drilling process and it can be minimized by suitable selection of the various cutting parameters such as feed and cutting speed. Research results also showed that drill bit type plays an important role in characterizing the drilling behavior of composite laminates.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on drilling of jute fiber reinforced polymer composites

Maleki

Hamedi

Kubouchi

et al. 2018

Journal of Composite Materials

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The use of natural fiber composites is growing at a fast rate in terms of industrial applications due to their eco-friendly, recyclable, renewable nature, and low density/costs. Recently, jute fiber is being used as a reinforcement material in the development of natural fiber reinforced plastics for engineering applications. Drilling is an essential machining operation that is frequently performed for making of holes in composite structures to facilitate assembly of several components into a complex part. The literature reviews indicate that only a few of research articles investigated drilling of natural fiber reinforced composites. Hence, in the present research, drilling of woven jute fiber reinforced polymer composites has been examined. This study aimed at evaluation of cutting parameters and drill bit types effect on thrust force, delamination size, and surface roughness in the jute fiber reinforced polymer composites drilling using an experimental design based on full factorial technique. The percentage contribution of the cutting parameters and drill bit types were determined through the analysis of variance. The optimal setting of these parameters was found through observation. The experimental results indicated that the most significant effect was the drill bit type influencing both delamination factor and surface roughness.

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“…the ratio of the maximum diameter D max in the damage zone to the hole diameter D), namely the conventional delamination factor (F d ) helps easy analysis and comparison of the degree of delamination in drilling CFRP composite laminates. 39,40 The calculated surface roughness (Ra) and delamination factor values obtained from unthreaded nozzle were averaged out for each of the experimental parameters and tabulated in Table 3 along with the internal threaded nozzle results presented in Table 4.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of delamination damage in carbon epoxy composites under swirling abrasives made by modified internal threaded nozzle

Balasubramanian

Madhu

2018

Journal of Composite Materials

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Carbon fibre-reinforced polymer composites are finding increased applications in the field of automotive manufacture and aircraft industries due to their appreciative combination of high strength and low weight. The machining of these composites with economically viable and high part qualities requires enhancement in machining strategies. Delamination and surface roughness are the undesirable geometrical defects inherent in abrasive jet machining of layered polymer composites. This investigation focuses on the mechanism of delamination and surface roughness in abrasive jet machining of carbon fibre-reinforced polymer composite. The paper endeavors at the exploration of the viability of imparting swirling motion to SiC abrasive particles by presenting internal threads in the newly designed nozzle. In this research, a novel threaded nozzle was introduced in the abrasive jet machine for making holes on the carbon fiber-reinforced polymer composites with the objective of reducing the delamination and surface roughness. This is a distinctive attempt of its kind and this has brought down the delamination factor considerably and, as a consequence, surface roughness obtained was minimum. Holes were made on carbon fiber-reinforced polymer composite by abrasive jet machining with a modified nozzle with and without an internal thread. The influence of abrasive jet parameters on the delamination factor (bottom and top) and surface roughness (Ra) was investigated. Maximum pressure and minimum SOD cause decrease in delamination and surface roughness in carbon fiber-reinforced polymer composite composites.

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Examination and modification of equivalent delamination factor for assessment of high speed drilling

Cited by 22 publications

References 30 publications

Natural fiber–reinforced composites: A review on material, manufacturing, and machinability

Natural fiber–reinforced composites: A review on material, manufacturing, and machinability

Experimental study on drilling of jute fiber reinforced polymer composites

Evaluation of delamination damage in carbon epoxy composites under swirling abrasives made by modified internal threaded nozzle

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