scholarly journals Effect of Different Cutting Depths to the Cutting Forces and Machining Quality of CFRP Parts in Orthogonal Cutting: A Numerical and Experimental Comparison

2018 ◽  
Author(s):  
Farid Miah ◽  
Emmanuel De-Luycker ◽  
Frederic Lachaud ◽  
Yann Landon ◽  
Robert Piquet
Keyword(s):  
Orthogonal Cutting ◽  
Research Work ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Experimental Comparison ◽  
Homogeneous Material ◽  
Cutting Depth ◽  
Reinforced Polymer ◽  
Thrust Forces

The necessity of understanding the influence of cutting variables in orthogonal cutting of Carbon Fiber Reinforced Polymer (CFRP) is vital because of their significant influences to the quality of manufactured parts. In this present research work the influences of different cutting depths to the cutting and thrust forces have been analyzed and a comparison between an equivalent homogeneous material (EHM) macro-model and experimental results have been made. The reasons of the beginning high cutting and thrust forces have been studied and explained. The post analysis of the experimental machined surfaces has been done to analyze the generated surface roughness and fiber-matrix interface crack generation. Five different cutting depths and four individual fiber orientations have been tested both numerically and experimentally. Significant influence of cutting depths to the cutting force has been found and the surface quality of newly generated machined part is discovered as a function of cutting depth and fiber orientation.

Comparisons of the use of twist, pilot-hole and step-drill on influence of carbon fiber-reinforced polymer drilling hole quality

2017 ◽  
Vol 52 (11) ◽  
pp. 1465-1480 ◽  
Author(s):  
Gong-Dong Wang ◽  
Melly S Kirwa
Keyword(s):  
Carbon Fiber ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Hole Quality ◽  
Pilot Hole ◽  
Reinforced Polymer ◽  
Thrust Forces ◽  
Step Drill ◽  
Delamination Damage

Understanding the drilling-induced damage to carbon fiber-reinforced polymer composites remains the most active research being undertaken in the composite materials world of today. Despite the vast amounts of literature available, the relationship between drilling and damage to the composites has not been fully understood. In this research, a comparative study of different drilling methods including the use of a twist drill, the use of a pilot hole/pre-drilled hole and the use of a step drill on the influence of the hole quality has been accomplished. In order to achieve this comparison, thrust forces have been monitored during drilling experiments where four different feed rates and one spindle speed have been considered. A finite element model has also been included to study delamination damage on the laminates and validate the experimental results. Results show that thrust forces increase with increasing feed rates and that drilling by step drill is the most appropriate method as it records low forces hence minimal delamination damage.

scholarly journals Influence of the Quality of Rivet Holes in Carbon-fiber-reinforced-polymer (CFRP) on the Connection Stability

2016 ◽  
Vol 6 ◽  
pp. 140-147 ◽  
Author(s):  
Lukas Heberger ◽  
Benjamin Kirsch ◽  
Tobias Donhauser ◽  
Sebastian Nissle ◽  
Martin Gurka ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

Experimental Investigation of the Influence of Stacking Sequence and Delamination Size on the Natural Frequencies of Delaminated Composite Plate

2021 ◽  
Vol 64 (1) ◽  
pp. 76-83
Author(s):  
Muhammad Imran ◽  
Rafiullah Khan ◽  
Saeed Badshah
Keyword(s):  
Carbon Fiber ◽  
Boundary Conditions ◽  
Composite Plate ◽  
Natural Frequencies ◽  
Research Work ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Stacking Sequence ◽  
Simply Supported ◽  
Reinforced Polymer

The vibration properties of the composite structures is critical to the reliability and durability of the structures. Vibration becomes worst in case the delamination is present within laminates. In this research work, experimental, finite element and analytical techniques have been applied in order to analyze the influence of stacking sequence and delamination sizes on the natural frequencies of carbon fiber reinforced polymer composite (CFRP) plate with and without delamination. The boundary conditions in this research work was (SSSS) (all sides simply supported. Experiments were performed to study the vibration characteristics of (CFRP) delaminated composite plate. Software package ABQUS was used to model and analyze the vibration response of carbon fiber reinforced polymer composite plate for (SSSS) boundary condition and the effect of stacking sequence and delamination size was calculated. Rayleigh- Ritz Method was used to find the natural frequencies for different delamination sizes and stacking sequences. The results was concluded that natural frequencies were significantly affected by the delamination sizes and stacking sequences. Stacking sequence of (0/90/45/90) showed higher values of natural frequencies in lower mode subjected to all-sides simply supported boundary conditions. It was interesting to see that there were small differences in values of natural frequencies among the stacking sequences for lower modes but the difference gradually increased in case of higher modes.    

scholarly journals Trial Think About on Flexural Quality of Fortified Solid Pillars Remotely Reinforced with CFRP Sheets

2019 ◽  
Vol 8 (9S3) ◽  
pp. 911-914
Keyword(s):  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Control Beam ◽  
Flexural Strengthening ◽  
Cfrp Sheets ◽  
Test Information ◽  
Reinforced Polymer ◽  
And Control

Fiber Reinforced polymer are ordinarily utilized for the Strengthening of Reinforced Concrete Structures. In that CFRP assumes a crucial job in giving the quality, solidness and malleability of the Reinforced solid Structures when contrasted and different filaments like GFRP, steel and aramid strands. Concentrate on Flexural Strengthening of RC Beams with CFRP (Multiple Layers) is completed. The component of the pillar examples are 100mmx200mmx1500mm. Fortified solid pillars remotely reinforced with CFRP sheets were tried utilizing a symmetrical two point concentrated static stacking framework. Two pillars were tried for Control Beam for Flexural (FB) and two bars tried for it is preloading of 70% for FB. Furthermore, after that it is tried by CFRP base just various layers for preloading of 70% for FB. The outcome appear in expanding quality when contrasted with preloading of 70% for FB. Test information on burden, diversion and extreme heap of every one of the pillar were acquired. The heap versus avoidance bends were contrasted and Control Beam for Flexural (FB), Preloading 70%FB and tried CFRP base numerous layer for preloading of 70% for FB. In this examination (CFRP) Carbon Fiber Reinforced Polymer gives apparent quality, solidness and malleability in flexure

Restoring Initially Cracked Reinforced Concrete Beams utilizing Carbon Fiber Reinforced Polymer Strips

2019 ◽  
Vol 7 (1) ◽  
pp. 30-34
Author(s):  
A. Ajwad ◽  
U. Ilyas ◽  
N. Khadim ◽  
Abdullah ◽  
M.U. Rashid ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Loading Test ◽  
Control Beam ◽  
Reinforced Polymer ◽  
Cfrp Sheet ◽  
Carbon Fiber Reinforced

Carbon fiber reinforced polymer (CFRP) strips are widely used all over the globe as a repair and strengthening material for concrete elements. This paper looks at comparison of numerous methods to rehabilitate concrete beams with the use of CFRP sheet strips. This research work consists of 4 under-reinforced, properly cured RCC beams under two point loading test. One beam was loaded till failure, which was considered the control beam for comparison. Other 3 beams were load till the appearance of initial crack, which normally occurred at third-quarters of failure load and then repaired with different ratios and design of CFRP sheet strips. Afterwards, the repaired beams were loaded again till failure and the results were compared with control beam. Deflections and ultimate load were noted for all concrete beams. It was found out the use of CFRP sheet strips did increase the maximum load bearing capacity of cracked beams, although their behavior was more brittle as compared with control beam.

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