Utilizing internal icing force to reduce delamination in drilling composite tubes

Hocheng, H.; Tsao, Chung-Chen; Chen, H.T.

doi:10.1016/j.compstruct.2015.11.043

Cited by 42 publications

(23 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A majority of studies have focused on drilling of CFRP laminates 4,[16][17][18][19][20][21][22][23] and CFRP/metal [24][25][26][27][28][29][30] stacks including drill-induced damages, drill bit geometry and tool wear. However, studies on milling of CFRP laminates are still quite limited.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on effects of fiber cutting angle in milling of high-strength unidirectional carbon fiber–reinforced polymer laminates

Wang

Wen

Ming

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

It is still a challenge to machine high-strength carbon fiber-reinforced polymer with high quality due to its poor machinability. Fiber direction is the critical factor. This article aims to investigate the effects of fiber cutting angle in milling of high-strength unidirectional carbon fiber-reinforced polymer laminates with regard to milling forces, machined surface morphology and surface roughness. The edge trimming and slot milling tests were conducted. The largest radial and tangential forces were observed on 135°fiber cutting angle followed by 90°while the smallest milling forces were observed on 45°fiber cutting angle. Totally, four basic material fracture mechanisms, that is, fiber-matrix debonding, bendinginduced fiber fracture, shear-induced fiber fracture and compression-induced fiber fracture, were observed by the analysis of fracture morphology for a single fiber. The four basic material fracture mechanisms dominate the material fracture behavior during the cutting of carbon fiber-reinforced polymer. Besides, it is indicated that surface roughness of the machined surfaces is highly related to the type of the surface defects. Surface cavities caused by fiber-matrix debonding and bending-induced fiber fractures on 45°fiber cutting angle were observed to be the main factors leading to the decline of surface finish in milling of carbon fiber-reinforced polymer laminates.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental study on effects of fiber cutting angle in milling of high-strength unidirectional carbon fiber–reinforced polymer laminates

Wang

Wen

Ming

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

show abstract

“…Figure 2b shows significant suppression and a reduction in drilling-induced delamination when there is active backup. The active backup force can be a mechanical force (hydraulic, pneumatic, motor and linkage driven) [26], an electromagnetic force [27,29] or a thermal/cold force [30].…”

Section: Active Backupmentioning

confidence: 99%

A Review of Backup Mechanism for Reducing Delamination when Drilling Composite Laminates

Tsao¹,

Hocheng²

2016

J. Res. Updates Polym. Sci.

Self Cite

View full text Add to dashboard Cite

Over the past decades, composite materials have been increasingly utilized in various industries because of their superior mechanical properties and resistance to corrosion. Drilling is essential to produce precise holes when loadcarrying structures are produced using composites. Because of the non-homogeneous and anisotropic property of composite laminates, delamination often occurs at the point where the drill exits, which affects reliability and safety. Some studies present a suppressed mechanism to prevent delamination when drilling composite laminates. The experimental results demonstrate delamination is significantly reduced by various suppressed mechanisms and greater feed rates produce the same level of delamination. The use of special drill geometries and backup has been demonstrated to be more advantageous than the use of adapted feed controls. The basis for the future development of a suppression mechanism for drilling composite laminates is determined.

show abstract

“…9,10 Delamination is always caused by the excessive cutting forces, especially for the thrust force during drilling process. 11,12 CFRP is a temperature-sensitive material because the resin matrix of CFRP is highly prone to softening, loss of strength, or even carbonation decomposition with the temperature above its glass transition temperature (300°C or less 13 ). High cutting temperature would cause machining defects, such as burn, delamination, pilling, and tearing.…”

Section: Introductionmentioning

confidence: 99%

Thermal characteristics of unidirectional carbon fiber reinforced polymer laminates during orthogonal cutting

Chen

Cai³

et al. 2018

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

Carbon fiber reinforced polymer has been used as a major material for primary load-bearing structural components in aviation industry. But its poor heat resistance is an important factor affecting the machining performance, because high cutting temperature above glass transition temperature of resin matrix (normally 300°C or below) may lead to the degradation of the resin matrix. In this study, orthogonal machining experiments were conducted to investigate the effects of cutting parameters, cutting tool geometric parameters, and material parameters on cutting temperature, and the prediction model of cutting temperature about fiber orientation angle ( θ) was built. Cutting temperature was measured by semiartificial thermocouple method. The experimental results revealed that the influence of cutting parameters on cutting temperature was not affected by fiber orientation angle of carbon fiber reinforced polymer. Cutting tool geometric parameters have little effect on cutting temperature. Unlike metal materials, cutting temperature was greatly influenced by θ. Cutting temperature for θ < 90° was significantly higher than that for θ > 90°. The maximum temperature occurred at θ = 90°. The influence of fiber orientation angle was shown in two aspects: changing the springback of unidirectional-carbon fiber reinforced polymer laminates in cutting process, changing material removal mechanism, which affected cutting temperature eventually.

show abstract

Utilizing internal icing force to reduce delamination in drilling composite tubes

Cited by 42 publications

References 19 publications

Experimental study on effects of fiber cutting angle in milling of high-strength unidirectional carbon fiber–reinforced polymer laminates

Experimental study on effects of fiber cutting angle in milling of high-strength unidirectional carbon fiber–reinforced polymer laminates

A Review of Backup Mechanism for Reducing Delamination when Drilling Composite Laminates

Thermal characteristics of unidirectional carbon fiber reinforced polymer laminates during orthogonal cutting

Contact Info

Product

Resources

About