scholarly journals Experimental Characterization and Numerical Modeling of the Interaction Between Carbon Fiber Composite Prepregs During a Preforming Process

2018 ◽  
Vol 140 (8) ◽  
Author(s):  
Weizhao Zhang ◽  
Xuan Ma ◽  
Jie Lu ◽  
Zixuan Zhang ◽  
Q. Jane Wang ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Fiber Composite ◽  
Superior Performance ◽  
Carbon Fiber Composite ◽  
Molding Process ◽  
Economic Method ◽  
Element Simulation ◽  
Carbon Fiber Reinforced Composites ◽  
Interaction Factors ◽  
Fabric System

Carbon fiber reinforced composites have received growing attention because of their superior performance and high potential for lightweight systems. An economic method to manufacture the parts made of these composites is a sequence of forming followed by a compression molding. The first step in this sequence is called preforming that forms the prepreg, which is the fabric impregnated with the uncured resin, to the product geometry, while the molding process cures the resin. Slip between different prepreg layers is observed in the preforming step, and it is believed to have a non-negligible impact on the resulting geometry. This paper reports a method to characterize the interaction between different prepreg layers, which should be valuable for future predictive modeling and design optimization. An experimental device was built to evaluate the interactions with respect to various industrial production conditions. The experimental results were analyzed for an in-depth understanding about how temperature, relative sliding speed, and fiber orientation affect the tangential interaction between two prepreg layers. Moreover, a hydro-lubricant model was introduced to study the relative motion mechanism of this fabric-resin-fabric system, and the results agreed well with the experiment data. The interaction factors obtained from this research will be implemented in a preforming process finite element simulation model.

scholarly journals Experimental Characterization of the Interaction Between Carbon Fiber Composite Prepregs During the Preforming Process

2017 ◽  
Author(s):  
Weizhao Zhang ◽  
Zixuan Zhang ◽  
Jie Lu ◽  
Q. Jane Wang ◽  
Xuming Su ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
High Performance ◽  
Fiber Composite ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Carbon Fiber Composite ◽  
Molding Process ◽  
Economic Method ◽  
Interaction Factors

Carbon fiber composites have received growing attention because of their high performance. One economic method to manufacturing the composite parts is the sequence of forming followed by the compression molding process. In this sequence, the preforming procedure forms the prepreg, which is the composite with the uncured resin, to the product geometry while the molding process cures the resin. Slip between different prepreg layers is observed in the preforming step and this paper reports a method to characterize the properties of the interaction between different prepreg layers, which is critical to predictive modeling and design optimization. An experimental setup was established to evaluate the interactions at various industrial production conditions. The experimental results were analyzed for an in-depth understanding about how the temperature, the relative sliding speed, and the fiber orientation affect the tangential interaction between two prepreg layers. The interaction factors measured from these experiments will be implemented in the computational preforming program.

Research on the Nonlinear Ultrasonic Testing of CFRP Based on Abaqus

2014 ◽  
Vol 610 ◽  
pp. 205-208
Author(s):  
Sang Sang Yu ◽  
Hui Feng Zheng ◽  
Wang Cheng ◽  
Ting Hao Tang
Keyword(s):  
Carbon Fiber ◽  
Ultrasonic Testing ◽  
Fiber Composite ◽  
High Sensitivity ◽  
Finite Amplitude ◽  
Carbon Fiber Composites ◽  
Carbon Fiber Composite ◽  
Detection Mechanism ◽  
Detection Model ◽  
Element Simulation

In order to overcome the limitations of conventional ultrasonic testing method to detect small defects of carbon fiber composite material, ultrasonic nonlinear detection method was proposed based on finite amplitude. Firstly the detection mechanism of finite amplitude method was studied, then the detection model was created, and ultrasonic nonlinear characteristics of carbon fiber composites was analyzed by finite element simulation, finally relative non-linear coefficients follow the change of defect length and width show that the finite amplitude method has a high sensitivity to detect small defects.

Application of Carbon Fiber Reinforced Composites on Lightweight Design of Articulated Platform

2018 ◽  
Vol 921 ◽  
pp. 85-90 ◽  
Author(s):  
Han Yang Li ◽  
Ying Dai ◽  
Xiao Fei Lyu
Keyword(s):  
Carbon Fiber ◽  
Optimization Design ◽  
Fiber Composite ◽  
Lightweight Design ◽  
High Stress ◽  
Bus Rapid Transit ◽  
Reinforced Composites ◽  
Carbon Fiber Composite ◽  
Stress Region ◽  
Carbon Fiber Reinforced Composites

For the purpose of weight saving, the heavy metal articulated platform, which is used in Bus Rapid Transit (BRT) vehicles to connect the front and rear compartments, is replaced with carbon fiber composite material. Composites articulated plates are designed based on the requirements of shape, size, positioning, connection and load of steel articulated platform. Optimization design is applied to high stress region in the articulated plates to provide references for the improvement and lightweight design of the articulated platform.

Facile fabrication of a vanadium nitride/carbon fiber composite for half/full sodium-ion and potassium-ion batteries with long-term cycling performance

Nanoscale ◽  
2020 ◽  
Vol 12 (19) ◽  
pp. 10693-10702 ◽  
Author(s):  
Lihong Xu ◽  
Peixun Xiong ◽  
Lingxing Zeng ◽  
Renpin Liu ◽  
Junbin Liu ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Fiber Composite ◽  
Cycling Performance ◽  
Potassium Ion ◽  
Sodium Ion ◽  
Superior Performance ◽  
Vanadium Nitride ◽  
Carbon Fiber Composite ◽  
Facile Fabrication

A VN/CNF composite was fabricated as an anode material exhibiting superior performance for half/full sodium-ion and potassium-ion batteries.

scholarly journals Secondary Raw Materials from Residual Carbon Fiber-Reinforced Composites by An Upgraded Pyrolysis Process

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3408
Author(s):  
Alexander Lopez-Urionabarrenechea ◽  
Naia Gastelu ◽  
Alberto Jiménez-Suárez ◽  
Silvia G. Prolongo ◽  
Adriana Serras-Malillos ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
Raw Materials ◽  
Fiber Composite ◽  
Tensile Modulus ◽  
Recycling Process ◽  
Carbon Fiber Composite ◽  
Gaseous Stream ◽  
Carbon Fiber Reinforced Composites ◽  
Interlaminar Shear

This paper presents a process where carbon fibers and hydrogen can be recovered simultaneously through a two-stage thermal treatment of an epoxy-carbon fiber composite. For this purpose, some pieces of epoxy resin reinforced with carbon fiber fabrics have been fabricated and, after curing, have been pyrolyzed in an installation consisting of two reactors. In the first one, the thermal decomposition of the resin takes place, and in the second one, the gases and vapors coming from the first reactor are thermally treated. Once this process is completed, the solid generated is oxidized with air to eliminate the resin residues and carbonaceous products from the fibers surface. The recovered carbon fiber fabrics have been reused to make new cured parts and their electrical and mechanical properties have been measured. The results show that it is possible to obtain carbon fiber fabrics that can be processed as they leave the recycling process and that retain 80% of the tensile modulus, 70% of the flexural strength, and 50% of the interlaminar shear strength. At the same time, a gaseous stream with more than 66% by volume of hydrogen can be obtained, reaching a maximum of 81.7%.

scholarly journals Comparative Characterization of Multiscale Carbon Fiber Composite with Long and Short MWCNTs at Higher Weight Fractions

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Michael Zimmer ◽  
Qunfeng Cheng ◽  
Shu Li ◽  
James Brooks ◽  
Richard Liang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Carbon Fiber Composite ◽  
Multiwalled Carbon ◽  
The Matrix ◽  
Carbon Fiber Reinforced Composites ◽  
Multi Walled Carbon Nanotubes

There are documented advantages to using carbon nanotubes (CNTs) in composites for various property enhancements. However, to date, only limited studies have been conducted on using of longer CNTs over 1 mm in length. This study used long multiwalled carbon nanotubes (LMWCNTs) and their longer extended networks to test multiple properties in thermal conductivity, electrical conductivity, mechanical strength, and modulus and then compared these properties to those of shorter multi-walled carbon nanotubes (SMWCNTs). For carbon fiber-reinforced composites, the longer graphite paths from LMWCNTs in the matrix were expected to improve all properties. The longer networks were expected to allow for more undisturbed phonon transportation to improve thermal conductivity. This in turn relates to improved electrical conductivity and better mechanical properties. However, results have shown that the LMWCNTs do not improve or decrease thermal conductivity, whereas the shorter MWCNTs provide mixed results. LMWCNTs did show improvements in electrical, mechanical, and physical properties, but compared to shorter MWCNTs, the results in other certain properties varied. This perplexing outcome resides in the functioning of the networks made by both the LMWCNTs and shorter MWCNTs.

Study on the Application of Carbon Fiber Composite Materials in High-Speed Trains

2017 ◽  
Vol 893 ◽  
pp. 31-34 ◽  
Author(s):  
Fei Fei Wang
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
High Speed ◽  
Fiber Composite ◽  
Rolling Stock ◽  
Electric Locomotive ◽  
Carbon Fiber Composite ◽  
Molding Process ◽  
Speed Test ◽  
Fiber Composite Materials

The new carbon fiber composite materials trains hood is designed with vacuum infusion molding process characteristics and performance of existing trains hood according to the characteristics of the high specific strength and stiffness of the carbon fiber composite materials. According to the requirements of referring to the IEC61373-1999[Railway Rolling Stock Equipment Shock and Vibration Testing Standards] and GB/T3317-2006[Electric Locomotive General Technical Conditions], the strength and deformation of the trains hood is calculated and analyzed on the conditions of the impaction, air movement load case and the end compression. The test result shows that the mechanical properties of the structure meets the requirements in the 500km/h high-speed test train.

scholarly journals Molding process and properties of continuous carbon fiber three-dimensional printing

2019 ◽  
Vol 11 (3) ◽  
pp. 168781401983569 ◽  
Author(s):  
Jun Zhang ◽  
Zude Zhou ◽  
Fan Zhang ◽  
Yuegang Tan ◽  
Renhui Yi
Keyword(s):  
Carbon Fiber ◽  
Fiber Composite ◽  
Three Dimensional ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Carbon Fiber Composite ◽  
Molding Process ◽  
Three Dimensional Printing ◽  
Continuous Carbon Fiber ◽  
Dimensional Printing

Currently, carbon fiber composite has been applied in the field of three-dimensional printing to produce the high-performance parts with complex geometric features. This technique comprise both the advantages of three-dimensional printing and the material, which are light weight, high strength, integrated molding, and without mold, and the limitation of model complexity. In order to improve the performance of three-dimensional printing process using carbon fiber composite, in this article, a novel molding process of three-dimensional printing for continuous carbon fiber composites is developed, including the construction of printing material, the design of printer nozzle, and the modification of printing process. A suitable structure of nozzle on the printer is adjusted for the continuous carbon fiber composites. For the sake of ensuring the continuity of composited material during the processing, a cutting algorithm for jumping point is proposed to improve the printing path during process. On this basis, the experiment of continuous carbon fiber composite is performed and the mechanical properties of the printed test samples are analyzed. The results show that the tensile strength and bending strength of the sample printed by polylactic acid–continuous carbon fiber composites increased by 204.7% and 116.3%, respectively compared with pure polylactic acid materials, and those of the sample printed by nylon–continuous carbon fiber composites increased by 301.1% and 17.4% compared with pure nylon materials, and those of test sample by nylon–continuous carbon fiber composites under the heated and pressurized treatment increased by 383.6% and 233.2% compared with pure nylon material.

The Carbon Fiber Composite Materials Application in Sports Equipment

2011 ◽  
Vol 341-342 ◽  
pp. 173-176 ◽  
Author(s):  
Li Na Sun ◽  
Zhen Deng
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Fiber Reinforced ◽  
Carbon Fiber Composite ◽  
Molding Process ◽  
Carbon Fiber Reinforced ◽  
Fiber Reinforced Material ◽  
Fiber Composite Materials

This paper introduces the carbon fiber and carbon fiber reinforced material performance, and expounds the molding process and introduces the current carbon fiber composite application in sports equipment.

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