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.

scholarly journals Effects of Nano Organoclay and Wax on the Machining Temperature and Mechanical Properties of Carbon Fiber Reinforced Plastics (CFRP)

2019 ◽  
Vol 3 (3) ◽  
pp. 85 ◽  
Author(s):  
El-Ghaoui ◽  
Chatelain ◽  
Ouellet-Plamondon ◽  
Mathieu
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Polycrystalline Diamond ◽  
Fiber Reinforced ◽  
Cfrp Laminates ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced ◽  
Pcd Tools

Carbon fiber reinforced plastics (CFRP) are appreciated for their high mechanical properties and lightness. Due to their heterogeneous nature, CFRP machining remains delicate. Damages are caused on the material and early tool wear occurs. The present study aims to evaluate the effects of fillers on CFRP machinability and mechanical behavior. CFRP laminates were fabricated by the vacuum assisted resin transfer molding (VARTM) process, using a modified epoxy resin. Three fillers (organoclay, hydrocarbon wax, and wetting agent) were mixed with the resin prior to the laminate infusion. Milling tests were performed with polycrystalline diamond (PCD) tools, equipped with thermocouples on their teeth. Machinability was then studied through the cutting temperatures and forces. Tensile, flexural, and short-beam tests were carried out on all samples to investigate the effects of fillers on mechanical properties. Fillers, especially wax, allowed us to observe an improvement in machinability. The best improvement was observed with 1% wax and 2% organoclay, which allowed a significant decrease in the cutting forces and the temperatures, and no deteriorations were seen on mechanical properties. These results demonstrate that upgrades to CFRP machining through the addition of nanoclays and wax is a path to explore.

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.

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