Carbon Fiber Material Research Articles

Functional performance differences between carbon fiber and fiberglass prosthetic feet.

Persons with lower limb amputation require increased functionality. The largest category of feet for active individuals with a transtibial amputation is energy storage and return (ESR) feet. These feet are typically constructed of carbon fiber composite materials. Recently, a prosthetic foot composed of a fiberglass composite has emerged in the market. However, there are no comparative studies of these devices. Compare the biomechanical performance and prosthesis-related quality of life when using a fiberglass prosthetic foot design compared with traditional carbon fiber ESR designs. This is a repeated-measures randomized cross-over trial. Gait analysis was performed on 10 experienced male subjects with unilateral transtibial amputations (K-level III) while walking on level ground and a ramp. Patient-reported outcomes were collected using the Prosthesis Evaluation Questionnaire. Gait data demonstrated increased ankle dorsiflexion (P < .01), similar ankle moments (P = .07), and increased ankle power generation (P = .01) when using the fiberglass foot. The increased power generation occurred at the correct time in the gait cycle such that the timing and magnitude of peak knee flexion was unaffected (P > .19). The fiberglass foot had greater energy absorption during gait (P = .01) with no difference in energy return (P = .37). The subjects expressed improved prosthesis-related quality of life with the fiberglass foot (P = .01). The findings of this study demonstrate that the new ESR foot comprising a fiberglass material had better performance than traditional designs using a carbon fiber material.

3D Thermal Network Supported by CF Felt for Improving the Thermal Performance of CF/C/Epoxy Composites.

The heat generated by a high-power device will seriously affect the operating efficiency and service life of electronic devices, which greatly limits the development of the microelectronic industry. Carbon fiber (CF) materials with excellent thermal conductivity have been favored by scientific researchers. In this paper, CF/carbon felt (CF/C felt) was fabricated by CF and phenolic resin using the “airflow network method”, “needle-punching method” and “graphitization process method”. Then, the CF/C/Epoxy composites (CF/C/EP) were prepared by the CF/C felt and epoxy resin using the “liquid phase impregnation method” and “compression molding method”. The results show that the CF/C felt has a 3D network structure, which is very conducive to improving the thermal conductivity of the CF/C/EP composite. The thermal conductivity of the CF/C/EP composite reaches 3.39 W/mK with 31.2 wt% CF/C, which is about 17 times of that of pure epoxy.

Development of Carbon Fiber and Intermediate Material Extending to the Applications

Development of Carbon Fiber and Intermediate Material Extending to the Applications

Development of Jute Hybrid Composites for use in the Car Panels

The purpose of this research work is to explore the potential of jute composites to be used in side panels of a car as a lightweight biodegradable substitute to steel and other materials, which will result in better fuel efficiency and maneuvering capabilities. Various tests were carried out to determine the feasibility ofusing these materials to make car panels. While it has lower tensile and flexural properties than that of carbon fiber material, still it can be replaced as a cheaper alternative to carbon, since carbon is very expensive and scarce. Also, it has higher strength to weight ratio than that of steel while being cheaper than steel, which can make it a plausible option for car manufacturers to look into. But at the same time, there are some issues that are needed to be overcome.

Application of new carbon fiber material in sports equipment

The application of a large number of carbon fiber composite materials in competitive sports improves the level of competitive sports and promotes the development of sports. Select the carbon fiber composite matrix to optimize the design of sports equipment structure, and obtain the optimal form, thickness and number of layers of reinforcement grid; based on the obtained information and number of layers of reinforcement grid, establish the finite element model of sports equipment reinforced plate, analyze the relationship between the stability of sports equipment reinforced plate and bending stiffness, obtain the optimal structure of stiffness in the design space of sports equipment, and complete the optimization of stiffness.

Study on production technology and surface morphology of carbon fiber

Since the 21st century, China’s carbon fiber industry has begun to develop rapidly. The research and development of carbon fiber is a major project related to national strategic security. Carbon fiber production technology has been mature, among which PAN based carbon fiber has the largest capacity. However, compared with the imported carbon fiber materials, there is still a certain gap in the performance of domestic carbon fiber materials. The purpose of this paper is to compare the properties of domestic carbon fiber and its composites. Firstly, the production process of carbon fiber is introduced, including monomer polymerization, spinning, oiling, preoxidation, carbonization, graphitization and other steps. Then, the T700 Carbon Fibers of Toray, Japan and two kinds of domestic T700 Carbon Fibers of Hengshen and Weihai were characterized and analyzed, and the surface morphology of three kinds of carbon fibers was compared. It is found that the domestic carbon fiber of Weihai adopts the similar technology of thousand spray wet spinning, and the fiber surface is smooth. However, Hengshen carbon fiber adopts the wet spinning process. There are grooves on the surface of the fiber, which will increase the mechanical meshing force between the fiber and the resin, and have a positive significance for the interface performance of the composite. However, it will increase the probability of fiber defects, such as fine lines, and have a negative impact on its tensile properties and other mechanical properties.

High Anisotropic Thermal Conductivity, Long Durability Form-Stable Phase Change Composite Enhanced by a Carbon Fiber Network Structure

To address the drawback of low thermal conductivity of conventional organic phase change materials (PCMs), a paraffin-wax-based phase change composite (PCC) was assembled via a vacuum impregnation method, using a new type of carbon fiber network material as the supporting matrix. The carbon fiber sheet (CFS) material exhibited a network structure comprising high-thermal-conductivity carbon fibers, beneficial for enhancing the heat transfer properties of the PCC. The sheet-shaped carbon fiber material was stacked and compressed, and then impregnated with the liquid paraffin wax PCM to form the composite. The thermal conductivity, durability, shape stability, chemical stability, and heat storage characteristics of the PCC specimen were carefully analyzed. The maximum thermal conductivity of the PCC was 11.68 W·m−1·K−1 (4670% compared to that of pure paraffin) in the radial direction, and 0.93 W·m−1·K−1 in the axial direction of the sample, with 17.44 vol % of added CFS. The thermal conductivity retention rate after 200 thermal cycles was 78.6%. The PCC also displayed good stability in terms of chemical structure, shape, and heat storage ability. This study offers insights and a possible strategy for the development of anisotropic high-thermal-conductivity PCCs for potential applications in latent heat storage systems.

Design and Manufacturing of New Low (Weight and Cost) 3D Printed Pylon Prosthesis for Amputee

The standard traditional prosthetic pylon is manufactured from stainless steel, titanium, Aluminium alloys due to their lightweights. Despite the low weight of pylon made of these alloys, the pylon is characterized by its high costs. In this study, a new prosthetic pylon is designed and manufactured from PLA carbon fiber material to produce a pylon characteristic with a lighter weight and cheaper than the standard pylon with its ability to bear the patient’s weight without any mechanical failure. The mechanical properties (yield stress, ultimate stress, and endurance stress) of the PLA carbon fiber filament were measured. The finite element method analysis of the pylon was done by using the ANSYS-14.5 program. The experimental and numerical results showed that the weight of the new prosthetic pylon is less than the weights of Stainless steel, Titanium, and Aluminium pylon by 60%,42%, and 50%, respectively, and the cost of the new prosthetic pylon is cheaper than the Stainless steel, Titanium, and Aluminium pylon by 97.5%,98%, and 96%, respectively. The mechanical properties of printed pylon material are the modulus of elasticity equal to 1.38GPa, the yield stress is 33.5MPa, the ultimate stress is 49.14 MPa, and the endurance stress is 19.16 MPa. The results also showed that the pylon’s buckling stress is higher than the yield stress and von mises stress is less than the yield stress; this proves the successful design of the pylon. The new design is cheaper, lighter, and can withstand higher patient weights.

Preparation of Fe-Cu-Based Friction Material and its Adoption in Automobile Mechanical Mechanism

To prepare a kind of Fe-Cu-based friction material with good friction performance and wear resistance, and apply it to the brake structure of automobile machinery, the powder metallurgy method is used to prepare the friction materials in the standard with 4% Ni, 4% Mo and 2% Sn as the auxiliary material, SiC, Al2O3, and zircon sand as the basic friction material, 8% graphite and 3% MoS2 as the lubricating component. Meanwhile, 50% Fe and 20% Cu is used for the preparation of friction materials. The friction and wear resistance can be increased by increasing the carbon fiber content of 0-8% concentration of the material. The results show that the friction coefficient of the Fe-Cu-based friction material is relatively gentle after the addition of 2% carbon fiber, and the compactness peaks, reaching 93.3%. Its shear strength and impact strength peak, which are 37.42Mpa and 6.7J/cm2 respectively. 4% carbon fiber material with a hardness of 120.2 HV is the hardest one, followed by 2% carbon fiber material with a hardness of 118.1 HV. Added with 2% carbon fiber, the abrasion amount of the friction-based material is 0.0027 g at room temperature and-0.0008 g at 400°C after 60 minutes respectively. With all indicators considered, the result shows that the friction performance and wear resistance of Fe-Cu-based friction materials can be increased by adding 2% carbon fiber during the preparation of basic friction materials.

Optimization of wing structure using carbon fibre on a combined shell blended wing body

Composite materials have many advantages in macro materials and nanomaterials. The strength of composite material is fully based on the orientation of ply. This research deals with the pressurized inner wing. Such design of the wing and fuselage remains a significant challenge for Flying Wing aircraft. Since the inner wing is nearly rectangular, it is relatively inefficient to resist the pressure loads by bending that consequently brings weight penalty. The wing structure was evaluated by using carbon fibre material at different orientations on fabric. To reduce this weight penalty of the wing, the internal multi-shell structure was combined to form a boxed multi bubble section configuration. The novel section was modelled and the structural properties were evaluated.

Project of The Strengthening of a Water Tank Carrier System with Carbon Fiber Material

Project of The Strengthening of a Water Tank Carrier System with Carbon Fiber Material

Study on compression moulding characteristics of carbon fibre materials in sports equipment

In order to more clarify the compression moulding characteristics of carbon fibre materials, this research carried out research on the compression moulding characteristics of carbon fibre materials in sports equipment. Obtain the stress curve of the carbon fibre material, and provide the parameter basis for the carbon fibre compression experiment. A 1 × 1 plain weave carbon fibre material was selected as the experimental sample material to study the compression moulding characteristics of the carbon fibre material. The experimental results show that when the hot pressing temperature is below 300°C, the sample material is prone to compression fracture, and the crack appears in a fixed area of the fibre distribution direction; with the continuous increase of the transverse and longitudinal compression load, the material splits in the carbon fibre distribution direction. The material is divided into several strands; the pre-yielding and post-yielding curves have a good agreement.

Substantination of carbon fiber as an innovative materials for fistening of mining workings of coal mines

Purpose. To analyze composite materials and prospects of their use as fastening materials for mining of coal mines.Perform a comparative analysis of the physical and mechanical properties of the innovative material carbon fiber and metallic materials, as well as compare their features. To determine the possibility of using carbon fiber as a fastening material for mining of coal mines. Research methodology. The generalization of physical and mechanical properties of carbon fiber on the basis of its analysis is performed. The features of mechanical properties of carbon fiber, steel and aluminum are compared, which showed that this composite material has the best physical and mechanical properties and it is expedient to use it in the fastening elements of mine workings. Research results. The areas of use of composite materials in industry are analyzed and generalized, and it is concluded that it is better to use carbon fiber as a fastening material for coal mine workings. A comparative analysis of the physical and mechanical properties of carbon fiber and steel is performed, which shows that this composite material has identical (and sometimes even better) properties as metallic materials. The advantages and disadvantages of carbon fiber as a fastening material for mining of coal mines are estimated. It is specified that the restraining factor, today, is the cost of carbon fiber, and later their price will decrease and demand will increase. It is concluded that when using this composite material in the fasteners of mine workings, it is possible to increase the pace of their implementation, reduce the complexity of the work performed and improve working conditions while facilitating the design. Scientific novelty. It is established that carbon fiber as a composite material can be used in the fastening elements of the preparatory workings of coal mines. Practical value. According to the results of the analysis, it is established that carbon plastics can be used in the fastening elements of mine workings, which will promote the development of underground coal mining.

Study on compression moulding characteristics of carbon fibre materials in sports equipment

Study on compression moulding characteristics of carbon fibre materials in sports equipment

ПОВЫШЕНИЕ ТЕРМОСТОЙКОСТИ УГЛЕВОЛОКНИСТЫХ АДСОРБЕНТОВ ПУТЕМ ИНТЕРКАЛИРОВАНИЯ BN И Р2О5

The possibility of increasing the thermal stability of carbon-fiber adsorbents by intercalation with BN and Р2О5 was investigated. The main sorption and electrophysical characteristics of carbon fiber materials and intercalated carbon fiber adsorbents based on them were studied. The possibility of increasing the thermal stability of a carbon fiber adsorbent with chromium and copper oxides deposited on the active surface by intercalating the carbon base with BN and P2O5 was shown

Stormwater herbicides removal with a solar-driven advanced oxidation process: A feasibility investigation

The solar driven advanced oxidation process (AOP) has the potential to be developed as a passive stormwater post-treatment method. Despite its widespread studies in wastewater treatment, the applicability of the process for micropollutant removal in stormwater (which has very different chemical properties from wastewater) is still unknown. This paper investigated the feasibility of three different AOP processes for the degradation of two herbicides (diuron and atrazine) in pre-treated stormwater: (i) photoelectrochemical oxidation (PECO), (ii) electrochemical oxidation (ECO), and (iii) photocatalytic oxidation (PCO). The durability of different anode materials, the effects of catalyst loading, and solar photo- and thermal impacts under different applied voltages were studied. Boron-doped diamond (BDD) was found to be the most durable anode material compared to carbon fiber and titanium foil for long-term operation. Due to the very low electroconductivity of stormwater, a high voltage was required, causing severe oxidation of the carbon fiber material. PECO achieved the best degradation results compared to ECO and PCO, with over 90% degradation of both herbicides in 2 h under 5 V, following a first-order decay process (with a half-life value of 0.40 h for diuron and 0.58 h for atrazine). The voltage increase had a positive impact on the oxidation processes, with 5 V found to be the optimal applied voltage, while catalyst loading had a negligible effect. Interestingly, the solar thermal effect plays a dominant role in enhancing the performance of the PECO process, which indicates the potential of integrating a photovoltaic chamber with a PECO system to harness both the light and heat of solar energy for stormwater treatment.

Design and Analysis of Suspension Strut in Automobile Vehicles

This research paper discusses about the design and analysis of suspension strut used in automotive industries. The main objective of this research is to study the suspension strut by modelling using solid works and then analysis have been performed using ANSYS by considering structural steel, carbon fiber and E-Glass material. Based on the results obtained from the analysis, comparison have been made for above materials to reduce the weight of the suspension strut to improve the life of the model. From the analysis results it can be concluded that it is possible to reduce the weight of suspension strut using composite materials. From the above study it can be concluded that glass fiber has performed well as compared to other materials which in turn increases the life of the suspension strut.

An experimental study on carbon fiber thickness and layer thickness of depositing material in fused deposition modeling

Abstract The paper deals with analyses of results of a study on the effect of process parameters in fusion deposition modeling (FDM) 3D printing of a selected composite. Physical models of polylactic acid (PLA) and polylactic acid- carbon fiber (PLA-CF) composites are rapid prototyped through layer by layer deposition (Fusion deposition modeling) technique. Two important process parameters viz. layer thickness of depositing material and thickness of carbon fiber (CF) were optimized to achieve the best set of mechanical properties. Further, tensile strength and flexural strength of the products so fabricated are chosen as response variables so as to study the effects of process parameters on mechanical properties by the use of analysis of variance (ANOVA) technique. The experimental results revealed that the addition of increasing thickness of carbon fiber (CF) in polylactic acid (PLA) based composite raises the tensile strength over that of the pure PLA specimen. Moreover, the tensile strength was found to decrease with an increase in layer thickness of depositing material in CF-PLA composite. The study further revealed that mean flexural strength increases with increasing layer thickness, but, its dependence on CF thickness does not show any specific trend.

Analysis of the Development of High-Performance Carbon Fiber Materials from the Engineering Perspective

High-performance carbon fiber has superior physical and chemical properties, and as a kind of national strategic resource, it is a key material in major projects such as aerospace. Because of the international blockade and limited level of domestic production, carbon fiber materials are currently unable to meet the domestic market and strategic needs. First, this article introduces the development of high-performance carbon fibers.The manufacturing process of high-performance carbon fiber materials was analyzed based on engineering science knowledge, and the key problem in the entire process was determined. It is believed that for key materials such as high-performance carbon fiber in major projects, engineering thinking should be used to conduct process engineering research on the entire manufacturing process. It is possible to promote the development of related basic disciplines and mechanical manufacturing automation and intelligence by improving the level of key material manufacturing.

Electrospinning as a route to advanced carbon fibre materials for selected low-temperature electrochemical devices: A review

Electrospinning is a versatile fabrication method for synthesising mesostructured nanofibrous mats and has been explored in this review for the following electrochemical energy storage devices: redox flow batteries, fuel cells, metal air batteries and supercapacitors. Electrospinning has been proven as a highly versatile fabrication method for producing nano-structured fibres with controllable morphology, of both the fibres themselves and the void structure of the mats. Additionally, it is possible to use heteroatom doped polymers or to include catalytic precursors in the electrospinning solution to control the surface properties of the fibres. These factors make it an ideal method for the production of electrodes and flow media for a variety of electrochemical devices, enabling reduction in mass transport and activation overpotentials and therefore increasing efficiency. Moreover, the use of biomass as a polymer source has recently gained attention for the ability to embed sustainable principles in the materials of electrochemical devices, complementing their ability to allow an increase in the use of renewable electricity via their application. In this review, the historical and recent developments of electrospun materials for application in redox flow batteries, fuel cells, metal air batteries and supercapacitors are thoroughly reviewed, including an overview of the electrospinning process and a guide to best practice. Finally, we provide an outlook for the emerging use of this process in the field of electrochemical energy devices with the hope that the combination of tailored microstructure, surface functionality and computer modelling will herald a new era of bespoke functional materials that can significantly improve the performance of the devices in which they are used.