Effect of drill flute direction on delamination at the exit in drilling Carbon Fiber Reinforced Plastic

Zhang, Jia; Bai, Yu; Wang, Fuji; Ma, Jian-wei; Cheng, Dong; Zhang, Zhongbiao

doi:10.1002/pc.25040

Cited by 16 publications

(8 citation statements)

References 26 publications

(39 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[39] Therefore, delamination on hole surfaces can be considered one of the critical subjects that should be taken into account during the drilling of composite materials as addressed in many literature efforts. [40][41][42] Particularly, delamination at the exit side is more severe than on the entry side for the drilling process. [43] The delamination factor at exit side can be calculated with the Equation 2 described by Chen, [44] where D max and D nom demonstrate the maximum hole diameter and nominal hole diameter, respectively.…”

Section: Specific Cutting Coefficient and Delamination Factor Analysesmentioning

confidence: 99%

A comprehensive investigation of drilling performance of anisotropic stacked glass‐carbon fiber reinforced hybrid laminate composites

et al. 2023

View full text Add to dashboard Cite

Among the various renewable energy sources, wind energy offers an effective solution to the energy providers. Onshore wind turbines are generally designed for sites with low wind resources, while offshore wind turbines can be more efficient in producing energy thanks to their longer blades that provide more than 10 MW of rated power. Offshore wind turbine blades are subjected to significantly higher stresses and harsh environmental conditions. Therefore, hybrid composites composed of carbon and glass fibers can offer cost-effective and long-lasting solutions for wind turbine blade manufacturers. Turbine blades are connected with main spars through bolted connections and high interlaminar stresses occurring during the drilling process can cause to delamination in the composites. To prevent catastrophic failure related to defective machining, the drilling process must be performed meticulously and all machining-related results must be analyzed step by step. In this paper, dry drilling properties of hybrid glass-carbon fiber laminate epoxy matrix composites were examined experimentally in order to contribute to the wind energy sector. The results showed that the delamination factor could be decreased with higher cutting speeds or lower feed rates. Besides, higher feed levels caused higher thrust forces on the tool body.

show abstract

Section: Specific Cutting Coefficient and Delamination Factor Analysesmentioning

confidence: 99%

A comprehensive investigation of drilling performance of anisotropic stacked glass‐carbon fiber reinforced hybrid laminate composites

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The ratio of the maximum strati ed diameter D max to the nominal diameter D norm of the hole F d is taken as the standard to measure the delamination degree [27], namely the diameter delamination factor, which is referred to as the delamination factor F d . The formula is shown in Eq.…”

Section: Delaminationmentioning

confidence: 99%

Helical milling for making holes on carbon fiber-reinforced polymer

Cheng

Yan³

et al. 2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Carbon ber reinforced polymer (CFRP) is widely used in various elds due to its excellent properties.However, machining defects such as delamination and burr are still the key issues constraining highquality hole making on CFRP. This research takes the helical milling process to make holes on CFRP and two kinds of cutting conditions (dry cutting and jet cold air assisted cutting) are explored. Tool wear, cutting force, delamination and surface morphology are taken as the main indices to be analyzed. The in uences of key cutting parameters (spindle speed n, axial feed per tooth f za and pitch a p ) on cutting force and delamination are investigated and optimized. It turns out that the jet cold air condition is more suitable for helical milling of holes on CFRP with better qualities. The holes with smaller delamination factor and smoother surface are successfully fabricated based on the optimized cutting parameters.

show abstract

“…The delamination factor was used to characterize the hole exit damage, as shown in Figure 16. Based on the maximum damage diameter, 42 it could be expressed by equation (14)…”

Section: Experimental Validationmentioning

confidence: 99%

Drill bit with clip-edges based on the force control model for reducing the CFRP damage

Hao

Wang

Zhao

et al. 2020

Journal of Reinforced Plastics and Composites

Self Cite

View full text Add to dashboard Cite

Carbon fiber reinforced plastic composites are popular in the aviation industry, and it is inevitable to drill holes within strict damage tolerances during assembly. However, drilling damages often occur at the drill-exit of carbon fiber reinforced plastic for lacking back support. This paper aims to study the drilling damages formation of carbon fiber reinforced plastic, and further proposes a novel drill structure for reducing the damages. According to the damage formation of drill-exit fibers, the mathematical model is established to analyze the tool-fibers cutting process and fiber deflection. Then based on the cutting model, the multi-edge control force cutting method is proposed, and it is an effective method to cut off fibers with deflection control and damage reduction. In order to carry out the cutting effect, a novel clip-edges drill structure is proposed. The geometric analysis of the novel structure reveals that the structure can cut the fibers from both sides and reduce fiber resin cracking. Finally, comparative experiments are carried out in drilling carbon fiber reinforced plastic, and the novel drill bit with clip-edges drill structure can reduce drilling exit damage and obtain more high-quality holes.

show abstract

Effect of drill flute direction on delamination at the exit in drilling Carbon Fiber Reinforced Plastic

Cited by 16 publications

References 26 publications

A comprehensive investigation of drilling performance of anisotropic stacked glass‐carbon fiber reinforced hybrid laminate composites

A comprehensive investigation of drilling performance of anisotropic stacked glass‐carbon fiber reinforced hybrid laminate composites

Helical milling for making holes on carbon fiber-reinforced polymer

Drill bit with clip-edges based on the force control model for reducing the CFRP damage

Contact Info

Product

Resources

About