scholarly journals Effect of Drilling Parameters Torque, Thrust Force and Delamination Factor on GFRP and CFRP Composites using Different Size of Drills

2020 ◽  
Vol 9 (1) ◽  
pp. 474-479
Keyword(s):  
Thrust Force ◽  
Industrial Applications ◽  
Fiber Reinforced Polymers ◽  
Drilling Process ◽  
Fiber Reinforced ◽  
Reinforced Polymers ◽  
Delamination Factor ◽  
Fiber Reinforced Polymer Composites ◽  
Drill Diameter ◽  
Helical Flute

The trend of the materials that are being used for various industrial applications has shown a drastic variation over the decades. Pure metals are replaced by alloys and these alloys in turn are being replaced by composites in most of the present day applications. Fiber reinforced polymer composites (FRPs) extensively used materials and a lot of research is going on for further improvement of properties of these materials. Drilling process is important in assembly of components in manufacturing. In case of FRPs drilling process is a great challenge when compared to that of conventional material because of de-bonding, metric cracking, and fiber pullout. The present work is a study on the effect of torque and thrust force on delamination of Carbon Fiber Reinforced Polymers (CFRP) and Glass Fiber Reinforced Polymers (GFRP) and by drilling process. Experiments are conducted at different feeds, drill diameters and speeds. Image processing approach is used to quantify the drill-induced delamination where helical flute HSS drills of diameters 4mm, 6mm and 8mm are used. Statistical analysis is made to optimize the drill parameters by ANOVA and Taguchi technique. It is observed that at 4mm drill diameter, torque and thrust force are minimum for both CFRP and GFRP. However, the delamination factor is minimum at drill diameter of 6mm in case of GFRP and at 8mm for CFRP

Delamination Analysis in Drilling Carbon Fiber-Reinforced Composites

2014 ◽  
Vol 697 ◽  
pp. 62-66
Author(s):  
Hong Fei Wang ◽  
Hua Zhou Li ◽  
Long Sheng Lu ◽  
Ying Xi Xie ◽  
Yu Xiao
Keyword(s):  
Carbon Fiber ◽  
Feed Rate ◽  
Thrust Force ◽  
Industrial Applications ◽  
Spindle Speed ◽  
Fiber Reinforced ◽  
Delamination Factor ◽  
Cfrp Composites ◽  
Drill Diameter ◽  
Carbon Fiber Reinforced

Due to its excellent performance, carbon fiber-reinforced plastics (CFRP) have been widely applied in industrial applications. The phenomenon of delamination can readily occur when drilling CFRP composites, which affects the quality of drilling holes. To effectively control the generation of processing defects, this paper focused on the analysis of the thrust force and the delamination factor. The delamination analysis was performed using graphs of the spindle speed, feed rate and drill diameter as independent parameters. The results suggest that there was a positive correlation between the delamination factor Fd and the thrust force Fz. The delamination factor decreases with increases in the spindle speed and increases with increases in the feed rate or with increases in the drill diameter. Based on the experimental data, this paper established a formula model of the delamination factor Fd, which would promote the further study of drilling CFRP composites.

Effects of Twist Drill Point Angle on Thrust Force and Delamination Factor in Hybrid Fiber Composites Drilling

2014 ◽  
Vol 564 ◽  
pp. 501-506 ◽  
Author(s):  
Mohd Azuwan Maoinser ◽  
Faiz Ahmad ◽  
Safian Shariff ◽  
Tze Keong Woo
Keyword(s):  
Feed Rate ◽  
Thrust Force ◽  
Polymeric Composite ◽  
Drilling Process ◽  
Twist Drill ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Frp Composites ◽  
Delamination Factor ◽  
Drill Point

Drill point angle of twist drill has a significant effect on thrust force and delamination factor on drilled holes in fiber reinforced polymer (FRP) composites. In this study, three drill point angle of twist drill; 85°, 118° and 135° were used to drill holes in hybrid fiber reinforced polymeric composite (HFRP). HFRP composites were fabricated using vacuum infusion molding (VIM) technique. The test samples were cured at 90°C for two hours. In drilling process various drill point angle and feed rate were employed to investigate the effect of both parameters on thrust force and delamination factor when drilling the HFRP composite. The results showed that small drill point angle and low feed rate can reduce the thrust force leading to the reduction of damage factor at the holes entrance and exit.

Mechanical properties of fiber reinforced polymer composites: A comparative study of conventional and additive manufacturing methods

2018 ◽  
Vol 52 (23) ◽  
pp. 3173-3181 ◽  
Author(s):  
Kuldeep Agarwal ◽  
Suresh K Kuchipudi ◽  
Benoit Girard ◽  
Matthew Houser
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced Polymers ◽  
Manufacturing Processes ◽  
Fiber Reinforced ◽  
Reinforced Polymers ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
Composite Filament

Fiber reinforced polymer composites have been around for many decades but recently their use has started to increase in multiple industries such as automotive, aerospace, and construction. The conventional composite manufacturing processes such as wet lay-up, resin transfer molding, automatic lay ups etc. suffer from a lot of practical and material issues which have limited their use. The mechanical properties of the parts produced by such processes also suffer from variation that causes problems downstream. Composites based additive manufacturing processes such as Fused Deposition Modeling and Composite Filament Fabrication are trying to remove some of the barriers to the use of composites. Additive manufacturing processes offer more design and material freedom than conventional composite manufacturing processes. This paper compares conventional composite processes for the manufacturing of Epoxy-Fiberglass fiber reinforced polymers with composite filament fabrication based Nylon-Fiberglass fiber reinforced polymers. Mechanical properties such as tensile strength, elastic modulus, and fatigue life are compared for the different processes. The effect of process parameters on these mechanical properties for the composite filament fabrication based process is also examined in this work. It is found that the composite filament fabrication based process is very versatile and the parts manufactured by this process can be used in various applications.

Tensile Properties of Natural Fiber Reinforced Polymers: An Overview

2015 ◽  
Vol 766-767 ◽  
pp. 133-139 ◽  
Author(s):  
Jeswin Arputhabalan ◽  
K. Palanikumar
Keyword(s):  
Tensile Properties ◽  
Polymer Composites ◽  
Natural Fiber ◽  
Natural Fibers ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Reinforced Polymers ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites

This paper deals with tensile properties of natural fiber reinforced polymer composites. Natural fibers have recently found increasing use in various fields as an alternative to synthetic fiber reinforced polymers. Due to this they have become attractive to engineers, researchers and scientists. Natural fibers are replacing conventional fibers such as glass, aramid and carbon due to their eco-friendly nature, lesser cost, good mechanical properties, better specific strength, bio-degradability and non-abrasive characteristics. The adhesion between the fibers and the matrix highly influence the tensile properties of both thermoset and thermoplastic natural fiber reinforced polymer composites. In order to enhance the tensile properties by improving the strength of fiber and matrix bond many chemical modifications are normally employed. In most cases the tensile strengths of natural fiber reinforced polymer composites are found to increase with higher fiber content, up to a maximum level and then drop, whereas the Young’s modulus continuously increases with increasing fiber loading. It has been experimentally found that tensile strength and Young’s modulus of reinforced composites increased with increase in fiber content [1].

scholarly journals Experimental and Scale-span Numerical Investigations in Conventional and Longitudinal Torsional Coupled Rotary Ultrasonic Assisted Drilling of CFRPs

2021 ◽  
Author(s):  
Yong Liu ◽  
Qiannan Li ◽  
Zhenchao Qi ◽  
Wenliang Chen
Keyword(s):  
Thrust Force ◽  
Three Dimensional ◽  
Fiber Reinforced Polymers ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Delamination Factor ◽  
Ultrasonic Assisted ◽  
Force Reduction ◽  
Drilling Conditions

Abstract Longitudinal torsional coupled rotary ultrasonic assisted drilling (LTC-RUAD) technology is introduced to improve the surface roughness of the hole wall and solve the tear, burr and delamination of carbon fiber reinforced polymers (CFRPs) induced by large thrust force and torque during conventional drilling (CD). An experiment and scale-span numerical investigation of drilling CFRPs was presented for both CD and LTC-RUAD process in this study. A drilling experimental platform using LTC-RUAD was built via a novel independently designed and manufactured LTC-RUAD vibration actuator, while the drilling experiments involving T700S-12K/YP-H26 CFRPs specimens with different process parameters were carried out by adopting the different ultrasonic vibration amplitude (UVA) in the longitudinal and torsional directions. Then, a three-dimensional (3D) scale-span FE simulation model of CD and LTC-RUAD which applied the different UVA using tapered drill-reamer (TDR) are developed to find more details about the effects of machining quality of the holes. Experimental and simulation results revealed that the maximum average thrust force reduction is observed to be as high as 30% under certain drilling conditions, and the maximum average thrust force and the delamination factor of the drilled hole shows a "concave" trend with the increase of the UVA. The quality at the exit of the drilled hole is the best when adopting Sr=2000rpm, Sf=0.01mm/rev, Alon=7.02μm and Ator=9.29μm in LTC-RUAD. The delamination factor is only 0.054. The damage factors are reduced by 69.67% compared with CD.

CRYOGENIC DRILLING OF CARBON FIBER-REINFORCED COMPOSITE (CFRP)

2019 ◽  
Vol 26 (09) ◽  
pp. 1950060 ◽  
Author(s):  
UĞUR KOKLU ◽  
SEZER MORKAVUK
Keyword(s):  
Surface Roughness ◽  
Carbon Fiber ◽  
Tool Wear ◽  
Thrust Force ◽  
Fiber Reinforced Polymers ◽  
Cryogenic Machining ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Carbon Fiber Reinforced

In order to reduce the adverse effects on the environment and economy and to avoid health problems caused by the excessively used cutting lubrications, cryogenic machining is drawing more and more attention. In this work, a novel cryogenic machining approach was applied for drilling of carbon fiber-reinforced polymers (CFRPs). According to this approach, CFRP was dipped into the liquid nitrogen (LN2) and it was machined within the cryogenic coolant directly. Various machinability characteristics on thrust force, delamination damage, tool wear, surface roughness, and topography were compared with those obtained with dry condition. This experimental study revealed that the novel method of machining with cryogenic dipping significantly reduced tool wear and surface roughness but increased thrust force. Overall results showed that the cryogenic machining approach in this study improved the machinability of CFRP.

scholarly journals Matrix and Filler Recycling of Carbon and Glass Fiber-Reinforced Polymer Composites: A Review

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3817
Author(s):  
Roberto Scaffaro ◽  
Alberto Di Bartolo ◽  
Nadka Tz. Dintcheva
Keyword(s):  
Composite Materials ◽  
High Performance ◽  
Value Added ◽  
Composite Fiber ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Reinforced Polymers ◽  
Frp Composites ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforced Polymer Composites

Fiber-reinforced polymers (FRPs) are low-density, high-performance composite materials, which find important applications in the automotive, aerospace, and energy industry, to only cite a few. With the increasing concerns about sustainability and environment risks, the problem of the recycling of such complex composite systems has been emerging in politics, industry, and academia. The issue is exacerbated by the increased use of FRPs in the automotive industry and by the expected decommissioning of airplanes and wind turbines amounting to thousands of metric tons of composite materials. Currently, the recycling of FRPs downcycles the entire composite to some form of reinforcement material (typically for cements) or degrades the polymer matrix to recover the fibers. Following the principles of sustainability, the reuse and recycling of the whole composite—fiber and polymer—should be promoted. In this review paper, we report on recent research works that achieve the recycling of both the fiber and matrix phase of FRP composites, with the polymer being either directly recovered or converted to value-added monomers and oligomers.

scholarly journals Galvanically Stimulated Degradation of Carbon-Fiber Reinforced Polymer Composites: A Critical Review

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 651 ◽  
Author(s):  
Stanley Ofoegbu ◽  
Mário Ferreira ◽  
Mikhail Zheludkevich
Keyword(s):  
Carbon Fiber ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Galvanic Coupling ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
Carbon Fiber Reinforced

Carbon is used as a reinforcing phase in carbon-fiber reinforced polymer composites employed in aeronautical and other technological applications. Under polarization in aqueous media, which can occur on galvanic coupling of carbon-fiber reinforced polymers (CFRP) with metals in multi-material structures, degradation of the composite occurs. These degradative processes are intimately linked with the electrically conductive nature and surface chemistry of carbon. This review highlights the potential corrosion challenges in multi-material combinations containing carbon-fiber reinforced polymers, the surface chemistry of carbon, its plausible effects on the electrochemical activity of carbon, and consequently the degradation processes on carbon-fiber reinforced polymers. The implications of the emerging use of conductive nano-fillers (carbon nanotubes and carbon nanofibers) in the modification of CFRPs on galvanically stimulated degradation of CFRP is accentuated. The problem of galvanic coupling of CFRP with selected metals is set into perspective, and insights on potential methods for mitigation and monitoring the degradative processes in these composites are highlighted.

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