scholarly journals Multiple Sensor Monitoring of CFRP Drilling to Define Cutting Parameters Sensitivity on Surface Roughness, Cylindricity and Diameter

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2796 ◽  
Author(s):  
Miguel Álvarez-Alcón ◽  
Luis Norberto López de Lacalle ◽  
Francisco Fernández-Zacarías
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
Electric Power ◽  
Thrust Force ◽  
Cutting Speed ◽  
Carbon Fiber Reinforced Plastic ◽  
Machining Parameters ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic

Machining parameters affects the final quality of components made in carbon fiber reinforced plastic (CFRP) composite materials. In this framework, the work here presented aims at studying the right combination of cutting speed (vc) and feed rate (vf), for dry drilling of carbon fiber reinforced plastic composite materials, which obtained better results regarding roughness, hole cylindricity, and diameter. A series of experimental tests were carried out under different drilling conditions (vc/vf), monitoring the thrust force (Fz), torque (T), and electric power (EP), to define which one can help more for industrial daily life production. Results validation was carried out using the analysis of variance, in order to relate main machining parameters cutting speed and linear feed, with thrust force, drilling torque, main spindle electric power and hole quality parameters (average roughness, cylindricity and diameter). The conclusions show that thrust force is not proportional to the cutting speed and the best combinations of cutting speed and feed were found out around the average values of tested parameters. Spindle electric power is an interesting element to take into account because it is easy to consider in real production.

RESEARCH OF POSSIBILITY OF APPLICATION OF FIREPROOF PASTE FOR INCREASE OF FIRE SAFETY OF DESIGNS FROM POLYMERIC COMPOSITE MATERIALS

2021 ◽  
pp. 67-75
Author(s):  
M.A. Venediktova ◽  
◽  
A.A. Evdokimov ◽  
L.L. Krasnov ◽  
A.P. Petrova ◽  
...  
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
Glass Fibre ◽  
Fire Safety ◽  
Polymeric Composite ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Polymeric Composite Materials ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic

Possibility of increase of fire safety of VPS-58 glass fibre plastics and carbon fiber-reinforced plastic the VKU-51 brands by putting fireproof swelling-up fireproof paste of the VZO-9kh brand is investigated. Complex researches of physicomechanical, fire and heatphysical properties of fireproof paste of the VZO-9kh brand are conducted. By results of researches it is established that fireproof paste of the VZO-9kh brand corresponds to qualifying standards and can be applied to increase of fire safety of designs from polymeric composite materials.

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.

Detection of Delamination in GFRP and CFRP by Microwaves with Focusing Mirror Sensor

2013 ◽  
Vol 750 ◽  
pp. 142-146 ◽  
Author(s):  
Atsushi Hosoi ◽  
Yuhei Yamaguchi ◽  
Yang Ju ◽  
Yasumoto Sato ◽  
Tsunaji Kitayama
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
Glass Fiber ◽  
High Sensitivity ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Plastic ◽  
Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic

A technique to detect delamination in composite materials by noncontact, rapid and high sensitive microwave reflectometry with a focusing mirror sensor was proposed. The focusing mirror sensor, which has high sensitivity and resolution, is expected to detect delamination sensitively. In this paper, the ability of microwave inspection to detect delamination in glass fiber reinforced plastic (GFRP) and carbon fiber reinforced plastic (CFRP) was verified. As the results, the existences of 100 μm thick delamination in 3 mm thick GFRP laminate and 2 mm thick CFRP laminate were detected.

Laminate Orientation Effect on Drilling of Carbon Fiber Reinforced Plastic Composites

2013 ◽  
Vol 315 ◽  
pp. 768-772
Author(s):  
Ismail Mahamad Hakimi ◽  
S. Sharif ◽  
Denni Kurniawan
Keyword(s):  
Carbon Fiber ◽  
Fiber Orientation ◽  
Thrust Force ◽  
Machining Process ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Cfrp Composites ◽  
Reinforced Plastic ◽  
Carbon Fiber Reinforced

Carbon fiber reinforced plastic (CFRP) composites are often used in combination with other materials, requiring it to be machined during fabrication of a structure. Drilling as the most common machining process of CFRP is complex often results in delamination of the composites. The complexity is contributed by CFRP composites fiber orientation which can be of unidirectional or quasi-isotropic type depending on the applications. This study reviews the machinability of CFRP composites by considering fiber orientation and machining conditions used during drilling. Their relation with machining thrust force which leads to delamination is the central theme. An insight in obtaining delamination-free holes is also discussed.

Deterioration of polycrystalline diamond tools in milling of carbon-fiber-reinforced plastic

2016 ◽  
Vol 51 (16) ◽  
pp. 2277-2290 ◽  
Author(s):  
Zhenyuan Jia ◽  
Youliang Su ◽  
Bin Niu ◽  
Yu Bai ◽  
Guangjian Bi
Keyword(s):  
Carbon Fiber ◽  
Diamond Tool ◽  
Cutting Speed ◽  
Tool Material ◽  
Polycrystalline Diamond ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Carbon Fiber Reinforced

The cutting edge of the polycrystalline diamond tool easily blunts in high-speed milling of carbon-fiber-reinforced plastic with the tool deterioration. It aggravates the burrs damage due to the change in the tool–material interaction. Therefore, this paper analyzes the tool–material interaction in milling of carbon-fiber-reinforced plastic based on the material-removal mechanism to investigate the tool deterioration mechanism. It reveals that there are two main reasons for the tool deterioration: the extreme crashing and ploughing of the uncut fibers on the tool, and the serious impact of fibers strongly supported on the cutting edge. An indirect measure method is proposed to quantify the tool deterioration including the ploughing-caused wear and impact-caused microchipping. Furthermore, the milling tests are performed to evaluate the tool deterioration under different cutting speeds in the range of 7.33–9.42 m/s. Meanwhile, a modified mathematical model of tool life is proposed based on a strict burr specification in milling of the carbon-fiber-reinforced plastics. Polycrystalline diamond tool has the longest life with the run-in wear and the quasi-steady-state wear for 7.33 m/s cutting speed, and the life rapidly decreases with the increase in the cutting speed in this range. For the cutting speed larger than 8.37 m/s, the wear resistance of polycrystalline diamond tool is very low, because the accelerated state wear occurs instead of the quasi-steady-state wear. Thus, the optimization of the tool geometry and the assisted lubrication should be applied for its improvement.

scholarly journals Investigation of mechanical characteristics of braided carbon fiber

2021 ◽  
pp. 13-22
Author(s):  
Mykhailo Bohatyr ◽  
Gennadiy Lvov ◽  
Oleksii Vodka ◽  
Oleksandr Oleksandrovych Chepeliuk
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
Composite Structures ◽  
Natural Frequencies ◽  
Carbon Fiber Reinforced Plastic ◽  
Damping Properties ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Modes Of Vibration

The use of composite materials in various branches of modern industry is rapidly increasing due to their high strength properties, low weight and good manufacturability. A wide variety of materials used, types of reinforcement and internal structures creates a need for studies of the static and dynamic properties of composite materials. Due to the latest advances in technology, composite materials are widely used in a variety of industrial applications. As a result, there is considerable interest in studying and understanding the behavior of composite structures. Analysis of composite structures, study of resonance frequencies, damping factors and modal shapes played an important role in determining the dynamic characteristics of the structure, detecting damage and monitoring the state of the composite structure. In this paper, the results of computational and experimental researches of the Young’s modulus, natural frequencies and modes of vibration, damping properties of the composite material are presented. The researches were carried out on samples of the woven ten-layer carbon fiber reinforced plastic. The investigated carbon fiber reinforced plastic has a plain weave. Samples were cut in three directions: warp (0 °), weft (90 °) and 45 °. Nine samples were prepared for each direction. To study the Young’s modulus, a tensile testing machine was used, and a vibration stand was used to determine the natural frequencies and modes of vibration. Damping properties are calculated by the Oberst method, based on the amplitude-frequency characteristics of the samples. Statistical processing of the experimental results was carried out and the values ​​of the mathematical expectation and variance were obtained. Geometric and finite element models of сarbon fiber reinforced plastic samples were built, their natural frequencies and vibration modes were determined. Comparison of the computational and experimental data with numerous calculations using the finite element method is carried out.

High-Velocity Impact Characteristic of Carbon Fiber Reinforced Plastic Laminates Using Ballistic Range

2006 ◽  
Vol 324-325 ◽  
pp. 1071-1074 ◽  
Author(s):  
Do Yeon Hwang ◽  
Akira Shimamoto ◽  
Kazuyoshi Takayama
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
High Speed ◽  
Penetration Resistance ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Ballistic Range ◽  
Reinforced Plastic ◽  
Plastic Laminates

Recently, high-performance hybrid composites have been used for various applications which require the high strength, high stiffness and low weight. There are growing needs in an automotive, an aircraft, and military applications for composite materials since they have good structural characteristics. They also have good penetration resistance and structural integrity after impact. In order to clarify the mechanism of high-speed destruction for composite materials, this study examined the penetration resistance and the fracture behavior of CFRP (Carbon Fiber Reinforced Plastic) Laminates by using ballistic range (one-stage light gas gun). Test materials for investigation are carbon/epoxy laminated composite materials with fiber direction; [0°]8, [0°/45°]4s, [ 0°/90°]4s, [ 0°/45°/90°]3s and [ 0°/45°/-45°90°]2s. The high speed camera allows us to capture and analyze the dynamic penetration phenomena of the test materials.

scholarly journals Temperature Study during the Edge Trimming of Carbon Fiber-Reinforced Plastic [0]8/Ti6Al4V Stack Material

2021 ◽  
Vol 5 (5) ◽  
pp. 137
Author(s):  
Arquimedes Castillo-Morales ◽  
Xavier Rimpault ◽  
Jean-François Chatelain ◽  
Gilbert Lebrun
Keyword(s):  
Carbon Fiber ◽  
Cutting Speed ◽  
Machining Process ◽  
Carbon Fiber Reinforced Plastic ◽  
Drilling Process ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Carbon Fiber Reinforced ◽  
Edge Trimming

Carbon Fiber-Reinforced Plastic (CFRP) and Titanium alloy (Ti6Al4V) stacks are used extensively in the modern aerospace industry thanks to their outstanding mechanical properties and resistance to thermal load applications. Machining the CFRP/Ti6Al4V stack is a challenge and is complicated by the differences in each constituent materials’ machinability. The difficulty arises from the matrix degradation of the CFRP material caused by the heat generated during the machining process, which is a consequence of the low thermal conductivity of Ti6Al4V material. In most cases, CFRP and Ti6Al4V materials are stacked and secured together using rivets or bolts. This results in extra weight, while the drilling process required for such an assembly may damage the CFRP material. To overcome these issues, some applications employ an assembly that is free of bolts or rivets, and which uses adhesives or an adapted curing process to bond both materials together. The present research analyzes a thermal distribution and its effect on quality during the edge trimming process of a CFRP/Ti6Al4V stack assembly. Different types of tools and cutting parameters are compared using thermocouples embedded within the material and others on the tool cutting edge. In contrast to previous studies, the feed rate was the most significant factor affecting the cutting temperature and quality of the workpiece, while the cutting speed had no significant impact. The temperature in the workpiece increases as the feed per tooth decreases.

Sign in / Sign up

Export Citation Format

Share Document