Study of delamination in drilling carbon fiber reinforced plastics (CFRP) using design experiments

Davim, J. Paulo; Reis, Pedro

doi:10.1016/s0263-8223(02)00257-x

Cited by 427 publications

(218 citation statements)

References 4 publications

Supporting

Mentioning

210

Contrasting

Unclassified

Order By: Relevance

“…Moreover, the effect of increase in cutting speed is more significant on the peel-up delamination than the push-down delamination, as shown in Figure 7. This quantitative interpretation of peel-up and push-down delamination with varying cutting speed is equivalent to the microscopic analysis (see Figure 6) and is also found in strong agreement in similar studies [11][12][13]27,39,57]. In Figure 7, the least peel-up and push-down delamination are recorded for 9000 rpm and 6000 rpm, respectively.…”

Section: Delamination Factor (F D )supporting

confidence: 88%

Assessment of Cutting Performance of Cemented Tungsten Carbide Drills in Drilling Multidirectional T700 CFRP Plate

Ali

Yue

et al. 2018

JMMP

View full text Add to dashboard Cite

Abstract:The drilling of carbon fiber reinforced polymer (CFRP) plate is very critical in its structural applications in aeronautical, aerospace, and automobile industries. For ensuring the good quality of drilled holes in terms of least drilling damage and prolonged tool life, suitable selection of drill geometry and material, and drilling parameters-such as cutting speed and feed rate-are imperative in the drilling of CFRP plate. This study aims to evaluate the cutting performance of conventional two-flute twist drills made of cemented tungsten carbide YG6X (WC-6 wt % Co) for the dry drilling of the multidirectional T700 CFRP plate. The effects of varying cutting speed and tool wear pattern on the drilling performance are analyzed. The drilling performance is assessed in terms of hole quality by the qualitative and quantitative analysis of drilling-induced delamination and hole diameter. Furthermore, the correlation between the tool wear progression and the drilled hole quality is established. Through this assessment, a suitable set of drilling parameters, i.e., cutting speed of 9000 rpm and feed rate of 400 mm/min, is proposed for producing the best quality holes for multidirectional T700 CFRP plate.

show abstract

Section: Delamination Factor (F D )supporting

confidence: 88%

Assessment of Cutting Performance of Cemented Tungsten Carbide Drills in Drilling Multidirectional T700 CFRP Plate

Ali

Yue

et al. 2018

JMMP

View full text Add to dashboard Cite

show abstract

“…Consequently, research into the machinability of CFRP and the drilling process in particular has accelerated over the past 10 -12 years, both in industry and academia. Aspects investigated have encompassed the effects of operating parameters [1], drill type [2,3], tool coatings [4] and material/fibre orientation [5,6] on various output measures including tool life, thrust forces, surface roughness, hole accuracy etc. A key challenge however is the elimination/reduction of hole entry/exit delamination as such flaws are known to adversely affect joint integrity and operating lifespan [7].…”

Section: Introductionmentioning

confidence: 99%

Drilling of Titanium/CFRP/Aluminium Stacks

Shyha

Soo

Aspinwall

et al. 2010

KEM

View full text Add to dashboard Cite

Following a review on the machinability of CFRP composites and multilayer stacks typically comprising metallic and composite material elements, the paper details experimental results when drilling 30 mm thick titanium/CFRP/aluminium workpiece stacks. Testing utilised a modified fractional factorial design based on an L18 Taguchi orthogonal array. This comprised four factors, three of which were at three levels and one at two levels and involved tool coating, cutting speed, feed rate and machining environment. Tools evaluated involved hardmetal and diamond coated carbide in addition to uncoated tungsten carbide drills. Response variables were principally tool wear and cutting force/torque with an end of test criteria of 300m flank wear. Peeling of the CVD diamond coating occurred within the first several holes drilled however this was not a limiting factor in terms of tool life. Principal damage occurred when drilling through the titanium (Ti-6Al-4V) rather than the aluminium (Al 7050) or CFRP (unidirectional “UD” laminates) sections. Best tool life/performance (310 drilled holes) was obtained with the more conventional uncoated carbide drills at lower cutting speed and feed rate. Typically thrust forces increased from 300 N for the first hole to ~2200 N for last hole drilled while torque values were generally below 600 N.cm for worn tools.

show abstract

“…In relation to the state of the art, the cutting speed for all tests was selected to be very low (v c = 0.63 m/min) in order to be able to apply the new strategies in Section 3.3, using the position control of the main spindle. delamination is controversial, discussed in several scientific papers [15][16][17][18][19][20][21]. In general, the influence of the cutting speed on the machining forces and the machining result is negligible compared to the machining of metal.…”

Section: Methodsmentioning

confidence: 99%

Process Forces Analysis and a New Feed Control Strategy for Drilling of Unidirectional Carbon Fiber Reinforced Plastics (UD-CFRP)

Sauer

Dix

Pütz

2018

JMMP

View full text Add to dashboard Cite

Reliable machining of carbon fiber-reinforced plastics (CFRP) is the key for application of these lightweight materials. Due to its anisotropy, CFRP is a very difficult material to machine because of occurring delamination and fiber-pullouts. The tool design is especially crucial to minimize and to avoid these processing errors. In this paper a process analysis for drilling is shown for better understanding of the chip formation. Drilling of unidirectional CFRP enables the investigation of the effect of fiber orientation on the chip formation process. In theory, the amount of cut fibers and the cutting angle to the main cutting edge determine the cutting force. Experimental tests with varied macroscopic drill geometries verify this theory. Based on these detected relationships, the tool loads can be calculated for a successful tool design.

show abstract

Study of delamination in drilling carbon fiber reinforced plastics (CFRP) using design experiments

Cited by 427 publications

References 4 publications

Assessment of Cutting Performance of Cemented Tungsten Carbide Drills in Drilling Multidirectional T700 CFRP Plate

Assessment of Cutting Performance of Cemented Tungsten Carbide Drills in Drilling Multidirectional T700 CFRP Plate

Drilling of Titanium/CFRP/Aluminium Stacks

Process Forces Analysis and a New Feed Control Strategy for Drilling of Unidirectional Carbon Fiber Reinforced Plastics (UD-CFRP)

Contact Info

Product

Resources

About