Machining quality of high speed helical milling of carbon fiber reinforced plastics

2021 ◽  
pp. 095440622199673
Author(s):  
Adel Abidi ◽  
Sahbi Ben Salem ◽  
Mohamed Athmane Yallese
Keyword(s):  
Surface Roughness ◽  
Carbon Fiber ◽  
High Speed ◽  
Hole Diameter ◽  
Feed Speed ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Machining Quality ◽  
Fiber Reinforced Plastics

Among advanced cutting methods, High Speed Milling (HSM) is often recommended to improve the productivity and to reduce the costs of machining parts. As every cutting process, HSM is characterized by some defects like surface roughness and delamination are the main defects generated in composite materials. The aim of this experimental work is the studying of the machining quality of woven Carbon fiber reinforced plastics (CFRP) using the HSM technology. Experiments were done using different machining parameters combinations to make opened holes in CFRP laminates. This study investigated the effect of cutting speed, orbital feed speed, hole diameter on the delamination defect and surface roughness responses generated in the drilled holes. The design of experimental tests was generated using the approach of Central Composite Design (CCD). The characterization of these responses was treated with the Analysis of variance (ANOVA) and Response surface methodology (RSM). Results showed that the surface roughness is highly affected by the orbital feed speed (F) with contribution of 22.45%. The delamination factor at entry and exit of holes is strongly influenced by the hole diameter D (25.97% and 57.43%) respectively. The developed model equations gave a good correlation between the empirical and predicted results. The optimization of the milling parameters was treated using desirability function to minimize the surface roughness (Ra) and the delamination factor simultaneously.

Effect of Grit Size and Wall Thickness of Core Drill on Machining Quality at Hole Exit in Drilling Carbon Fiber Reinforced Plastics Laminate

2012 ◽  
Vol 538-541 ◽  
pp. 1382-1386
Author(s):  
Wei Feng Wang ◽  
Yan Chen ◽  
Jiu Hua Xu ◽  
Juan Mu
Keyword(s):  
Carbon Fiber ◽  
Wall Thickness ◽  
Grit Size ◽  
Feed Speed ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Machining Quality ◽  
Fiber Reinforced Plastics ◽  
Induced Defects

This article focuses on the drilling of carbon fiber reinforced plastics (CFRP) laminate with brazed diamond core drill under no cooling condition. The effect of grit size, wall thickness of core drill and feed speed on machining quality at the hole exit is studied. The experimental results indicate that the grit size has a significant influence on the diameter of the hole exit. The expanding factor of diameter at hole exit increases with the decrease of grit size. Both large wall thickness and high feed speed lead to serious drilling-induced defects of the hole exit. The drilling-induced defects at hole exit are transformed from broken-edge and burr to local tear.

scholarly journals Electrically conductive carbon fiber layers as lightning strike protection for non-conductive epoxy-based CFRP substrate

2020 ◽  
Vol 54 (29) ◽  
pp. 4547-4555 ◽  
Author(s):  
Siwat Manomaisantiphap ◽  
Vipin Kumar ◽  
Takao Okada ◽  
Tomohiro Yokozeki
Keyword(s):  
Carbon Fiber ◽  
High Speed ◽  
Lightning Strike ◽  
Fiber Reinforced ◽  
Electrically Conductive ◽  
Lightning Strikes ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Hybrid Laminate

A large amount of electrically conductive fillers is needed to enhance a Carbon Fiber Reinforced Plastics (CFRP) electrical conductivity enough to withstand lightning strikes of peak currents. However, such large alien constituents hamper the inherent good mechanical properties of CFRP structures. In this work, a solution has been proposed to retain both desired properties in a CFRP laminate. Layer-wise hybrid laminate has been demonstrated as a solution for lightning strike protection of Carbon Fiber Reinforced Plastics (CFRP). Top few layers of a hybrid laminate are prepared using electrically conductive polymer-based resin (CF/C-POLY) to provide effective dissipation of lightning current while epoxy-based CFRP substrate (CF/Epoxy) provides the main structural strength. An insulating adhesive layer is used to bond CF/C-POLY and CF/Epoxy to prepare the laminate. The hybrid laminates were tested for their effectiveness against lightning strikes. Laminates were struck by modified lightning waveform of component A with peak current of -14 kA and -40 kA. The performance of the laminates against lightning strike were evaluated using high speed camera, high-speed and thermal camera. It is found that CF/C-POLY layer successfully defended the main structural component i.e. CF/Epoxy from lightning direct damage.

Study of Surface Roughness in Milling Carbon Fiber Reinforced Plastics Using PCD Tool

2012 ◽  
Vol 531-532 ◽  
pp. 63-66
Author(s):  
Yun Dian Zhang ◽  
Hui Hui Xiao ◽  
Yue Teng
Keyword(s):  
Surface Roughness ◽  
Carbon Fiber ◽  
Feed Rate ◽  
Cutting Parameters ◽  
Fiber Reinforced ◽  
Cutting Depth ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Cutting Velocity ◽  
Fiber Reinforced Plastics

The surface roughness of carbon fiber reinforced plastics (CFRP) has been studied at different cutting parameters by using PCD tools. The effect of cutting parameters such as cutting velocity, cutting depth, cutting width as well as feed rate on roughness are analyzed. A predictive model for surface roughness in milling was established by regression analysis method. Based on the experimental results, the regression coefficient was calculated and the significance check of the regression equation was carried out. Results show that cutting depth has a significant effect on surface roughness and the next one is cutting velocity, then it is cutting width, feed rate has a little effect under the current experimental conditions. The regression is significant for the prediction model. The parameters used in milling can be selected to improve the quality of the surface based on the model of the paper.

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