Hole Making Process of Carbon Fiber Reinforced Polymer (CFRP) Using End Mill Cutting Tool

2012 ◽  
Vol 576 ◽  
pp. 64-67 ◽  
Author(s):  
Erween Abdul Rahim ◽  
Z. Mohid ◽  
K.C. Mat ◽  
M.F.M. Jamil ◽  
R. Koyasu ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Fiber Reinforced Polymer ◽  
Helical Milling ◽  
Carbon Fiber Reinforced Polymer ◽  
Depth Of Cut ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

This paper presents an alternative way of producing a hole by using a helical milling concept on a carbon fiber reinforced polymer (CFRP). Delamination is a major problem associated with making a hole by drilling on the CFRP. This study focused on helical milling technique using a vertical machining center in order to produce a hole. Various levels of cutting parameter such as cutting speed, feed rate and depth of cut have been chosen to observe the effect of trust force, delamination and surface roughness. The result will be used to determine on which cutting parameters give the best hole quality that will achieved by this new approached.

An experimental investigation on cutting-induced damage when drilling high-strength T800S/250F carbon fiber–reinforced polymer

2015 ◽  
Vol 231 (11) ◽  
pp. 1931-1940 ◽  
Author(s):  
Jinyang Xu ◽  
Qinglong An ◽  
Ming Chen
Keyword(s):  
Experimental Investigation ◽  
Carbon Fiber ◽  
Tool Wear ◽  
High Strength ◽  
Cutting Parameters ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

In modern manufacturing sectors, mechanical drilling of high-strength carbon fiber–reinforced polymer represents the most challenging task as compared to conventional low-strength carbon fiber–reinforced polymer drilling due to the extremely superior mechanical/physical properties involved. The poor machinability of the composite usually results in serious geometric imperfection and physical damage in drilling and hence leads to a large amount of part rejections. In this article, an experimental investigation concerning the cutting-induced damage when drilling high-strength carbon fiber–reinforced polymer laminates was presented. The studied composite specimen was a newly developed high-strength T800S/250F carbon fiber–reinforced polymer composite. A special concentration was made to inspect and characterize the phenomena of various cutting-induced damage promoted in the material drilling. The work focused on the study of the influence of cutting parameters on the distribution and extent of hole damage formation. The experimental results highlighted the most influential factor of feed rate and tool wear in affecting the final extent of induced hole damage when drilling high-strength T800S/250F carbon fiber–reinforced polymer. For minimizing the various damage formation, optimal cutting parameters (high spindle speed and low feed rate) and rigorous control of tool wear should be seriously taken when drilling this material.

Influences of milling strategies and process parameters on the cavity defect generated during milling of carbon fiber reinforced polymer

2020 ◽  
pp. 095440622093839
Author(s):  
Fuji Wang ◽  
Guangjian Bi ◽  
Xiaonan Wang ◽  
Xiang Zhao
Keyword(s):  
Carbon Fiber ◽  
Process Parameters ◽  
Removal Rate ◽  
Cutting Speed ◽  
Assessment Methods ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

The burrs and delamination induced in milling of carbon fiber reinforced polymer have been studied extensively to suppress them. The cavity defect is still generated frequently on the machined surface of carbon fiber reinforced polymer when the fiber cutting angle is obtuse, resulting in the performance degradation of carbon fiber reinforced polymer parts. Nevertheless, there are a few researches on the cavity defect and the effectiveness of the evaluation methods for characterizing the cavity defect is not clearly given during milling of carbon fiber reinforced polymer. In this work, the objective is to obtain the nine combinations of milling strategy and process parameters to reduce the cavity defect in milling of carbon fiber reinforced polymer by multi-tooth tool. Two assessment methods of the cavity defect are proposed to quantitatively evaluate the cavity defect, including the average depth and volume of the cavities. Then, the influences of milling strategies and process parameters on the cavity defect are figured out, and the effectiveness of the assessment methods is analyzed. It is found that the average volume of the cavity is more proper to evaluate the cavity defect. The results indicate that the optimal combination of milling strategy and process parameters for low cavity defect and high material removal rate is up milling, low cutting speed, and high feed per tooth. The findings in this work could guide the high-performing milling of carbon fiber reinforced polymer parts with higher machining efficiency.

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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