scholarly journals Micro-Scale Modeling of Carbon-Fiber Reinforced Thermoplastic Materials

2011 ◽  
Vol 146 ◽  
pp. 1-11 ◽  
Author(s):  
Fethi Abbassi ◽  
A. Gherissi ◽  
Ali Zghal ◽  
Sébastien Mistou ◽  
Joël Alexis
Keyword(s):  
Carbon Fiber ◽  
Homogenization Method ◽  
Constitutive Law ◽  
Woven Fabric ◽  
Fiber Reinforced ◽  
Micro Scale ◽  
Specific Strength ◽  
Scale Modeling ◽  
Carbon Fiber Reinforced ◽  
The Right

Thin-walled textile-reinforced composite parts possess excellent properties, including lightweight, high specific strength, internal torque and moment resistance which offer opportunities for applications in mass transit and ground transportation. In particular, the composite material is widely used in aerospace and aircraft structure. In order to estimate accurately the parameters of the constitutive law of woven fabric composite, it is recommended to canvass multi-scale modeling approaches: meso, micro and macro. In the present investigation, based on the experimental results established by carrying out observations by Scanning electron microscope (SEM), we developed a micro-scale FEM model of carbon-fiber reinforced thermoplastic using a commercial software ABAQUS. From the SEM cartography, one identified two types of representative volume elementary (RVE): periodic and random distribution of micro-fibers in the yarn. Referring to homogenization method and by applying the limits conditions to the RVE, we have extracted the coefficients of the rigidity matrix of the studied composites. In the last part of this work, we compare the results obtained by random and periodic RVE model of carbon/PPS and we compute the relative error assuming that random model gives the right value.

Cold Spray Sn Coating on the Carbon Fiber Reinforced Polymer

2021 ◽  
Author(s):  
Jiayu Sun ◽  
Kenta Yamanaka ◽  
Akihiko Chiba ◽  
Yuji Ichikawa ◽  
Hiroki Saito ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Cold Spray ◽  
Cold Spraying ◽  
High Heat ◽  
Fiber Reinforced ◽  
Gas Temperature ◽  
Specific Strength ◽  
Reinforced Plastics ◽  
High Heat Input ◽  
Carbon Fiber Reinforced

Abstract Because of their high specific strength; carbon fiber reinforced plastics (CFRPs) are widely used in the aerospace industry. Metallization of CFRP by cold spraying as a surface modification method can improve the low thermal resistance and electrical conductivity of CFRP without the need for high heat input. Herein; we cold spray a Sn coating on cured CFRP substrates and examine the Sn/epoxy interface. The results suggest that the Sn coatings are successfully obtained at a gas temperature of 473 K and indicate no severe damage to the CFRP substrates. The stress and plastic strain distributions at the cross-section of the Sn/CFRP interface when a Sn particle is impacted onto the CFRP substrate are obtained using the finite element method.

scholarly journals DEVELOPMENT OF RAPID PIPE MOULDING PROCESS FOR CARBON FIBER REINFORCED THERMOPLASTICS BY DIRECT RESISTANCE HEATING

2012 ◽  
Vol 06 ◽  
pp. 616-621 ◽  
Author(s):  
KAZUTO TANAKA ◽  
RYUKI HARADA ◽  
TOSHIKI UEMURA ◽  
TSUTAO KATAYAMA ◽  
HIDEYUKI KUWAHARA
Keyword(s):  
Carbon Fiber ◽  
Woven Fabric ◽  
Production Cycle ◽  
Resistance Heating ◽  
Fiber Reinforced ◽  
Heating Method ◽  
Moulding Process ◽  
Carbon Fiber Reinforced ◽  
Reinforced Thermoplastics ◽  
Fiber Reinforced Thermoplastics

To deal with environmental issues, the gasoline mileage of passenger cars can be improved by reduction of the car weight. The use of car components made of Carbon Fiber Reinforced Plastics (CFRP) is increasing because of its superior mechanical properties and relatively low density. Many vehicle structural parts are pipe-shaped, such as suspension arms, torsion beams, door guard bars and impact beams. A reduction of the car weight is expected by using CFRP for these parts. Especially, when considering the recyclability and ease of production, Carbon Fiber Reinforced Thermoplastics are a prime candidate. On the other hand, the moulding process of CFRTP pipes for mass production has not been well established yet. For this pipe moulding process an induction heating method has been investigated already, however, this method requires a complicated coil system. To reduce the production cost, another system without such complicated equipment is to be developed. In this study, the pipe moulding process of CFRTP using direct resistance heating was developed. This heating method heats up the mould by Joule heating using skin effect of high-frequency current. The direct resistance heating method is desirable from a cost perspective, because this method can heat the mould directly without using any coils. Formerly developed Non-woven Stitched Multi-axial Cloth (NSMC) was used as semi-product material. NSMC is very suitable for the lamination process due to the fact that non-crimp stitched carbon fiber of [0°/+45°/90°/-45°] and polyamide 6 non-woven fabric are stitched to one sheet, resulting in a short production cycle time. The use of the pipe moulding process with the direct resistance heating method in combination with the NSMC, has resulted in the successful moulding of a CFRTP pipe of 300 mm in length, 40 mm in diameter and 2 mm in thickness.

The Machinability of 3D-C/SiC Composites

2011 ◽  
Vol 484 ◽  
pp. 36-40 ◽  
Author(s):  
Ping He ◽  
Shao Ming Dong ◽  
X.Y. Zhang ◽  
Yu Sheng Ding ◽  
Lian Gao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Carbon Fiber ◽  
Thermal Structure ◽  
Woven Fabric ◽  
Three Dimension ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced ◽  
Sic Composites

Carbon fiber reinforced silicon carbide (C/SiC) composites are considered as one of the most potential thermal structure materials. However, the non-machinability of the three dimension woven fabric restrict the wide application of the c/sic composites. In this paper, we discuss the effect of machinability on the properties of 3D-c/sic composites, such as the modulus, mechanical properties, and so on. The results show that c/sic composites exhibit excellent mechanical properties after machinability, an extensive microstructure study is also carried out to understand the properties of the composites.

Mechanical Characteristic Changes of Carbon Fiber Reinforced Plastics (CFRP) Depending on the Lamination Methods

2014 ◽  
Vol 1016 ◽  
pp. 130-134
Author(s):  
In Pyo Cha ◽  
Hee Jae Shin ◽  
Min Sang Lee ◽  
Sung Woo Hong ◽  
Jin Young Kwon ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Tensile Test ◽  
Mechanical Characteristic ◽  
Tensile Tests ◽  
Woven Fabric ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Reinforced Plastic ◽  
Plastic Forming ◽  
Carbon Fiber Reinforced

The prepreg process among the CFRP (Carbon Fiber Reinforced Plastic) forming methods is the short term of ‘Pre-impregnation’, which is widely used for aerospace composites that require a high quality property such as a fiber-reinforced woven fabric, in which an epoxy hardening resin is impregnated. the reality is, however, that this process requires continuous researches and developments for its commercialization because the delamination characteristically develops between the layers when a great weight is loaded from outside. to supplement such demerit, three lamination methods among the prepreg lamination methods of CFRP were designed to minimize the delamination between the layers due to external impacts. Further, the newly designed methods and the existing lamination methods were analyzed through a mechanical characteristic test, tensile test and infrared thermal device during the tensile tests, to obtain a better property than the existing lamination methods. the tensile test result showed that the newly designed three lamination methods, i.e. Roll, Half and Zigzag lamination methods, appeared superior to the Play lamination method in the aspects of the strength and strain. The strength of the Zigzag lamination method, which was the highest, was confirmed as being improved by about 20% than that of the Ply method.

Micro-Scale Fiber Cutting Geometry Predictions During Milling of Carbon Fiber Reinforced Polymers (CFRP) Composites

2019 ◽  
Author(s):  
Xingyu Fu ◽  
Kyeongeun Song ◽  
Dongmin Kim ◽  
Gyuho Kim ◽  
Byung-Kwon Min ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Milling Process ◽  
Fiber Reinforced Polymers ◽  
Geometrical Parameters ◽  
Fiber Reinforced ◽  
Machined Surface ◽  
Micro Scale ◽  
Pull Out ◽  
Carbon Fiber Reinforced ◽  
Milling Forces

Abstract Carbon Fiber Reinforced Polymer (CFRP) is a light-weight material with high strength and highly corrosion resistance, and hence is widely applied in aerospace industries. However, milling of CFRP usually generates machining defects (for instance, delamination and pull-out fibres), making processed surface unqualified to meet the requirement of aerospace application. Therefore, prediction for machining quality should be conducted before milling processing to avoid potential loss in massive production. Fracture behaviours of micro-scale fibres and matrix have a significant influence on the final machined surface, and such material removal mechanism can be mainly determined by micro-scale geometrical relationships between carbon fibers and milling teeth. In this paper, a micro-scale geometrical calculation software for CFRP milling is provided based on Dexel model. The software can generate geometrical parameters, for example, cutting angle, cutting length and engagement angle, for the whole milling process. Milling defects and milling forces can be conducted based on those micro-scale geometrical parameters.

Fiber content measurement for carbon fiber–reinforced thermoplastic composites using carbonization-in-nitrogen method

2016 ◽  
Vol 31 (1) ◽  
pp. 79-90 ◽  
Author(s):  
Qiushi Wang ◽  
Haibin Ning ◽  
Uday Vaidya ◽  
Selvum Pillay ◽  
Leigh-Ann Nolen
Keyword(s):  
Carbon Fiber ◽  
Fiber Content ◽  
Thermoplastic Composite ◽  
Thermoplastic Composites ◽  
Fiber Reinforced ◽  
Specific Strength ◽  
Extended Application ◽  
Melt Impregnation ◽  
Carbon Fiber Reinforced ◽  
Hot Melt

Carbon fiber–reinforced thermoplastic composites are gaining increasing interest in various applications thanks to their combined properties of high specific stiffness, high specific strength, and superior toughness. Their mechanical properties are highly dependent on the carbon fiber content. In this study, the carbonization-in-nitrogen method (CIN) developed in previous work is used to measure the fiber content of carbon fiber thermoplastic composites. Three types of carbon fiber thermoplastic composite samples were prepared using hot-melt impregnation. The carbon fiber thermoplastic composite sample is carbonized in a nitrogen environment alongside a neat resin sample that is used for calibrating the resin carbonization percentage. A good agreement is achieved between the nominal carbon fiber content and the carbon fiber content measured using the CIN method. It is concluded that the CIN method is an accurate and efficient way to characterize the carbon fiber content for carbon fiber thermoplastic composites. This work completes the verification of the CIN method, which enables extended application to thermoplastic composites. Moreover, it has its unique merits on evaluating the carbon fiber content for high-temperature and solvent-resistant thermoplastic composites that would encounter challenges using other methods.

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