Fundamental Study on Delamination in Milling Kenaf Fiber Reinforced Plastic Composite (Unidirectional)

2016 ◽  
Author(s):  
Azmi Harun ◽  
Che Hassan Che Haron ◽  
Jaharah A. Ghani ◽  
Suhaily Mokhtar ◽  
Asmawi Sanuddin
Keyword(s):  
Feed Rate ◽  
Fiber Composite ◽  
Spindle Speed ◽  
Fiber Reinforced ◽  
Kenaf Fiber ◽  
Fiber Reinforced Plastic ◽  
Milling Parameters ◽  
Plastic Composite ◽  
Delamination Factor ◽  
Reinforced Plastic

Kenaf Fiber is one of natural fibers which becoming popular as a reinforced for plastic composite material in the industrial application such as aircraft, automotive, sporting goods, and marine engineering. In machined kenaf fiber composite, the important factor should be control is the delamination factor in order to control the quality of product. The delamination of a milled kenaf reinforced plastic is depending on the milling parameters (spindle speed, feed rate and depth of cut). Therefore, a study was carried out to investigate the relationship between the milling parameters and their effects on a kenaf reinforced plastic. In this study, the composite panels were fabricated using vacuum assisted resin transfer molding (VARTM) method. A full factorial design of experiments was used as an initial step to screen the significance of the parameters on the defects using Analysis of Variance (ANOVA). If the curvature of the collected data shows significant, Response Surface Methodology (RSM) is then applied for obtaining a quadratic modeling equation which has more reliable in expressing the optimization. Thus, the objective of this research is obtaining an optimum setting of milling parameters and modeling equations to minimize delamination factor of milled kenaf fiber reinforced plastic composite. The spindle speed and feed rate contributed the most in affecting the delamination factor of kenaf fiber composite.

Effects of Different Parameters on Delamination Factor of Glass Fiber Reinforced Plastic (GFRP)

2013 ◽  
Vol 3 (2) ◽  
pp. 17-31
Author(s):  
Vikas Sharma ◽  
Vinod Kumar ◽  
Harmesh Kumar
Keyword(s):  
Glass Fiber ◽  
Feed Rate ◽  
Experimental Investigations ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Plastic ◽  
Fiber Reinforced Plastic ◽  
Delamination Factor ◽  
Glass Fiber Reinforced ◽  
Drill Bits ◽  
Reinforced Plastic

The experimental investigations of the delamination factor of glass fiber reinforced plastic at different cutting parameters are reported in this study. This paper has involved the determination of different factors affecting the hole quality and cause of delamination in a glass fiber reinforced plastic. The various process parameters like different twist drill bits of different materails, different point angle at different speed, feed rate have been taken. The thrust forces and torque values were measured using piezoelectric dynamometer. Mathematical model has been developed for different machining conditions using Minitab software with help of Taguchi design to plan the experiments. The Universal microscope has been used which determines delaminated diameter in GFRP specimens. The finite element method has been applied by using Ansys11.0 software which helped to find out delaminated diameter. It was experimentally observed that for the tungsten carbide and M50 drill bits, the thrust force and torque significant increases on increasing the point angle and feed rate.

Effects of Different Parameters on Delamination Factor of Glass Fiber Reinforced Plastic (GFRP)

2014 ◽  
pp. 1140-1150
Author(s):  
Vikas Sharma ◽  
Vinod Kumar ◽  
Harmesh Kumar
Keyword(s):  
Glass Fiber ◽  
Feed Rate ◽  
Experimental Investigations ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Plastic ◽  
Fiber Reinforced Plastic ◽  
Delamination Factor ◽  
Glass Fiber Reinforced ◽  
Drill Bits ◽  
Reinforced Plastic

The experimental investigations of the delamination factor of glass fiber reinforced plastic at different cutting parameters are reported in this study. This paper has involved the determination of different factors affecting the hole quality and cause of delamination in a glass fiber reinforced plastic. The various process parameters like different twist drill bits of different materails, different point angle at different speed, feed rate have been taken. The thrust forces and torque values were measured using piezoelectric dynamometer. Mathematical model has been developed for different machining conditions using Minitab software with help of Taguchi design to plan the experiments. The Universal microscope has been used which determines delaminated diameter in GFRP specimens. The finite element method has been applied by using Ansys11.0 software which helped to find out delaminated diameter. It was experimentally observed that for the tungsten carbide and M50 drill bits, the thrust force and torque significant increases on increasing the point angle and feed rate.

scholarly journals Recycling of Waste Fiber-Reinforced Plastic Composites: A Patent-Based Analysis

Recycling ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 72
Author(s):  
Beatrice Colombo ◽  
Paolo Gaiardelli ◽  
Stefano Dotti ◽  
Flavio Caretto ◽  
Gaetano Coletta
Keyword(s):  
Future Development ◽  
Industrial Applications ◽  
Growth Potential ◽  
Chemical Recycling ◽  
Fiber Reinforced ◽  
Mechanical Recycling ◽  
Fiber Reinforced Plastic ◽  
Technology Roadmap ◽  
Plastic Composite ◽  
Reinforced Plastic

Fiber-reinforced plastic composite materials are increasingly used in many industrial applications, leading to an increase in the amount of waste that must be treated to avoid environmental problems. Currently, the scientific literature classifies existing recycling technologies into three macro-categories: mechanical, thermal, and chemical; however, none are identified as superior to the others. Therefore, scholars and companies struggle to understand where to focus their efforts. Patent analysis, by relying on quantitative data as a precursor to new technological developments, can contribute to fully grasping current applications of each recycling technology and provide insights about their future development perspectives. Based on these premises, this paper performs a patent technology roadmap to enhance knowledge about prior, current, and future use of the main recycling technologies. The results show that recycling macro-categories have different technology maturity levels and growth potentials. Specifically, mechanical recycling is the most mature, with the lowest growth potential, while thermal and chemical recycling are in their growth stage and present remarkable future opportunities. Moreover, the analysis depicts several perspectives for future development on recycling technologies applications within different industries and underline inter- and intra-category dependencies, thus providing valuable information for practitioners and both academic and non-academic backgrounds researchers interested in the topic.

Monitoring of hole surface integrity in drilling of bi-directional woven carbon fiber reinforced plastic composites

2020 ◽  
Vol 234 (12) ◽  
pp. 2432-2458 ◽  
Author(s):  
Tarakeswar Barik ◽  
Kamal Pal ◽  
Smruti Parimita ◽  
Priyabrata Sahoo ◽  
Karali Patra
Keyword(s):  
Carbon Fiber ◽  
Feed Rate ◽  
Thrust Force ◽  
Internal Surface ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Circularity Error ◽  
Drill Point

Fiber-reinforced plastic is one of the top priorities lightweight materials with excellent mechanical properties for the aerospace industries in recent years. However, it is difficult to machine despite having unique properties due to its non-homogeneous and abrasive nature in alternate fiber and matrix layers. Thus, it is found to be a challenging task to drill hole on such hard-to-machine materials, which is highly essential for the development of most of the engineering structural components. The present work addresses various drilling-induced defects such as delamination, circularity error, and roughness variations in the hole surface during drilling of quasi-isotropic cross-fiber oriented bi-directional woven-type carbon fiber reinforced plastic laminate using a full factorial design of experiments for different drill geometry. The response surface methodology was considered for the regression model development, which was found to be highly significant. The machining forces with associated torque have also been acquired during drilling, which was divided and further analyzed in time domain to correlate with drilling flaws. The drilling-induced delamination was found to be higher at a high feed rate using a higher drill point angle due to substantial thrust force generation at the initial stages in the drilling cycle. However, the internal surface finish with associated circularity error was reduced for higher spindle speed with less feed rate using a low drill point angle because of low torque fluctuation at the final drilling phases. The axial thrust force was found to be a prime indicator of drilled hole surface delamination, whereas drilling torque precisely indicated internal surface roughness as well as circularity error. The global root mean square, along with a local peak of thrust and torque, both were highly essential to completely characterize the drilled hole quality.

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