Predicting thrust force for drilling fiber reinforced polymers using twist drills

2021 ◽  
Author(s):  
Shitong Luo ◽  
Zhen Dong
Keyword(s):  
Thrust Force ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Reinforced Polymers ◽  
Twist Drills

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 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

scholarly journals A multi‐scale fatigue‐damage model for fiber‐reinforced polymers

PAMM ◽  
2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Nicola Magino ◽  
Jonathan Köbler ◽  
Heiko Andrä ◽  
Matti Schneider ◽  
Fabian Welschinger
Keyword(s):  
Fatigue Damage ◽  
Damage Model ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Reinforced Polymers ◽  
Multi Scale
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