scholarly journals Correlation between Drop Impact Energy and Residual Compressive Strength According to the Lamination of CFRP with EVA Sheets

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 224 ◽  
Author(s):  
Sun-Ho Go ◽  
Min-Sang Lee ◽  
Chang-Gi Hong ◽  
Lee-Ku Kwac ◽  
Hong-Gun Kim
Keyword(s):  
Carbon Fiber ◽  
Vinyl Acetate ◽  
Impact Test ◽  
Ethylene Vinyl Acetate ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced ◽  
The Impact

Carbon-fiber-reinforced plastic is an important building material; however, its application is limited because of its brittleness, leading to vulnerability under shock. Thus, the strength performance of carbon-fiber-reinforced plastics needs to be improved. Here, the drop impact test was conducted to analyze the impact energy and fracture characteristics of carbon-fiber-reinforced plastics and ethylene vinyl acetate sheets. The compression after impact test was performed to assess the residual compressive strength. The thermal energy generated was measured as change in temperature at the time of fracture to investigate the relationship between thermal and mechanical properties. The impact absorption efficiency of 100% was achieved when the carbon-fiber-reinforced plastics specimen was laminated with four or more sheets of ethylene vinyl acetate. The thermal energy generated during impact, the impact load, and the compression after impact test strength was reduced with the increasing number of laminated ethylene vinyl acetate layers. Our results showed that, by carefully selecting the optimal conditions of fabricating the carbon-fiber-reinforced plastic/ethylene vinyl acetate composites, carbon composite materials can be used for impact mitigation.

Experimental Study on the Tool Wear in Milling Carbon Fiber Reinforced Plastics

2017 ◽  
Vol 893 ◽  
pp. 57-61 ◽  
Author(s):  
Ju Dong Liu ◽  
Xiao Fan Yang ◽  
Zhi Long Xu ◽  
You Sheng Li ◽  
Guo Hong Yan ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Cvd Diamond ◽  
Fiber Reinforced ◽  
Milling Cutter ◽  
Impact Action ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced ◽  
The Impact

Basing on the milling experiment of carbon fiber reinforced plastics (CFRP), the wear performance of CVD diamond coated tool with different cutting edge is compared and studied. The result shows that lifetimes of interlaced edge and herringbone edge milling cutters are significantly higher than general edge milling cutter, under the same parameters. The lifetime of interlaced edge milling cutter is about 2 times than herringbone edge milling cutter, and 3.5 times than general edge milling cutter. The wear failure mechanisms of CVD diamond coated tools are abrasive wear and coating peeling, which are caused by micro-cutting of hard carbon fiber and the impact action of mechanical load and thermal stress.

STUDY OF THE POSSIBILITY OF INCREASING THE IMPACT RESISTANCE OF THIN-SHEETED CARBON FIBER-REINFORCED PLASTICS DUE TO CLADING WITH ARAMID ORGANOPLASTICS

2021 ◽  
pp. 35-42
Author(s):  
G.F. Zhelezina ◽  
◽  
N.A. Solovieva ◽  
G.S. Kulagina ◽  
P.M. Shuldeshova ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Impact Resistance ◽  
Fiber Reinforced ◽  
Technical Literature ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced ◽  
The Impact ◽  
Specific Impact

The article provides the analysis of the scientific and technical literature and the effectiveness of the use of organoplastics in aircraft structures as screens and coatings that provide protection of carbon parts from damage caused by shock and erosion. The paper examined the mechanical properties and the nature of impact fracture of carbon fiber-reinforced plastics samples without a cladding layer. It is shown that it is possible to increase the specific impact strength in bending by 22 % due to cladding of CFRP, and to reduce the area of damage by 30 % upon impact with a kinetic energy of 30 J.

scholarly journals The influence of milling parameters on the surface roughness of glass and carbon fiber reinforced plastics

Mechanik ◽  
2019 ◽  
Vol 92 (10) ◽  
pp. 649-651
Author(s):  
Krzysztof Ciecieląg ◽  
Kazimierz Zaleski ◽  
Krzysztof Kęcik
Keyword(s):  
Surface Roughness ◽  
Carbon Fiber ◽  
Cutting Speed ◽  
Depth Of Cut ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced ◽  
The Impact

In this paper, the impact of milling process parameters on the roughness of surface of glass and carbon fiber reinforced plastics was analyzed. The influence of feed per tooth, cutting speed and depth of cut on selected surface roughness parameters was determined. It was found that the surface roughness after milling carbon fiber reinforced plastics was greater compared to the surface of glass fiber reinforced plastics.

The impact of prepreg aging on its processability and the postcure mechanical properties of epoxy-based carbon-fiber reinforced plastics

2016 ◽  
Vol 231 (1-2) ◽  
pp. 62-72 ◽  
Author(s):  
D Blass ◽  
S Kreling ◽  
K Dilger
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Shelf Life ◽  
Aviation Industry ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced ◽  
The Impact

Due to the intention to increase the product efficiency by weight reduction, the application of carbon fiber reinforced plastics and its processing becomes more and more important for the industrial production planning. The aviation industry mostly uses epoxy-based preimpregnated laminates (prepregs). These prepregs are stored in the refrigerated state and may be processed after defrosting only for a specific shelf-life or so-called out-time. This limitation in processing time reduces the efficiency of the entire production, for example due to the waste of material during production stops. To improve the production effectiveness the shelf-life should be as high as possible, to be able to avoid material waste during production stops. Therefore, the processability and the postcure mechanical properties of two representative prepregs were investigated during this study for different aging stages and correlated with the reactivity of the prepregs.

INCREASING SENSITIVITY OF EDDY CURRENT NON-DESTRUCTIVE TESTING OF DELAMINATION IN CARBON-FIBER REINFORCED PLASTICS

2021 ◽  
pp. 28-37
Author(s):  
P. N. Shkatov ◽  
G. A. Didin ◽  
A. A. Ermolaev
Keyword(s):  
Carbon Fiber ◽  
Eddy Current ◽  
Calculation Model ◽  
Fiber Reinforced ◽  
Destructive Testing ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced ◽  
The Difference

The paper is concerned with increasing sensitivity of eddy current nondestructive testing of most dangerous delamination in carbon-fiber reinforced plastics (CFRP). Increased sensitivity is achieved by separate registration and comparison of eddy current signals obtained from a set of stratifications of carbon fibers with the same orientation. The separation of eddy current signals is possible due to pronounced anisotropy of the electrical conductivity of the layers dominant in the direction of the fibers of the corresponding layer. Eddy-current signals are registered by eddy current probes with maximum sensitivity in a given angular direction. Prior to the scan eddy current signals of the probe are leveled on a defect-free area. The influence of the working gap on the difference between the eddy current signals of the probe is suppressed by normalizing it according to one of the signals. The analysis of the registered signals from delamination has been performed using an approximate calculation model. The reliability of the obtained results has been confirmed by comparison with experimental results and calculations using the finite element method.

Sign in / Sign up

Export Citation Format

Share Document