scholarly journals Influence of Infiltration Pressure on the Microstructure and Properties of 2D-CFRP Prepared by the Vacuum Infiltration Hot Pressing Molding Process

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2014 ◽  
Author(s):  
Yuqin Ma ◽  
Yatao Zhao ◽  
Yun Zhang ◽  
Jie Wang ◽  
Yi Chen ◽  
...  
Keyword(s):  
Composite Material ◽  
Carbon Fiber ◽  
Hot Pressing ◽  
Dynamic Models ◽  
Bending Strength ◽  
Fracture Morphology ◽  
Vacuum Infiltration ◽  
Bending Test ◽  
Molding Process ◽  
Infiltration Pressure

The critical infiltration pressures of the matrix in a two-dimensional (2D) carbon fiber preform were calculated theoretically, and the calculated values of the static and dynamic models were 0.115 and 0.478 MPa, respectively. Compared with the dynamic model, there is no viscous resistance or infiltration front gas pressure in the static model, so the static value is obviously lower than the dynamic value. To verify the rationality of theoretical calculation, 2D carbon fiber reinforced plastics (2D-CFRP) with infiltration pressures of 0.5, 0.6, 0.7, 0.8, and 0.9 MPa were prepared by the vacuum infiltration hot pressing molding process. The microstructure of the composite was observed and the bending strength was tested by three-point bending test. The results show that the infiltration pressure has an important influence on the infiltration effect and the bending fracture morphology. When the infiltration pressure is 0.7 MPa, the composite has an excellent infiltration effect. The fibers distribute reasonable in the fracture. Stress can be effectively transferred when the composite material is loaded. And the bending strength of the composite material reaches 627 MPa at this time.

Bending Strength of Cast Materials Reinforced with Hard Particles

2010 ◽  
Vol 457 ◽  
pp. 404-409
Author(s):  
Setsuo Aso ◽  
Hiroyuki Ike ◽  
Ken-Ichi Ohguchi ◽  
Yoshinari Komastu ◽  
Nobuo Konishi
Keyword(s):  
Composite Material ◽  
Bending Strength ◽  
Composite Layer ◽  
Cemented Carbide ◽  
Bending Test ◽  
Spheroidal Graphite ◽  
Four Point Bending ◽  
Hard Particles ◽  
Particle Reinforced Composite ◽  
Insertion Process

Particle reinforcement via the insertion of hard particles is a promising process in materials reinforcing. Particle-reinforced spheroidal graphite martensitic cast iron (SGMC), in which mixed particles of cermet and cemented carbide are dispersed, was achieved by an insertion process. A four-point bending strength test was applied to evaluate the particle composite material. An evaporative pattern process was used on the bending-test specimen to form a composite layer in the central part. Using a combination of three sizes of cermet particles and two sizes of cemented-carbide particles, the bending strength was found to increase with each small-particle combination. The Weibull coefficient m of the four-point bending strength of the particle-reinforced composite material (PRCM) ranged from 4 to 13, and m was large in the specimen with large bending strength.

Performance of Self-Lubricant Bearing from Composite Material and its Application Practice in Textiles

2013 ◽  
Vol 706-708 ◽  
pp. 189-192
Author(s):  
Xian Fang Wang ◽  
Yong Sheng Song
Keyword(s):  
Composite Material ◽  
Carbon Fiber ◽  
Economic Value ◽  
Roller Bearing ◽  
Molding Process

Self-lubricant roller bearing from composite material of caprolactam, carbon fiber, and graphite was made. And its molding process was discussed. Its friction and deformation performance was studied. Moreover, different varieties of yarns were spun in the spinning machine for contrast tests. The results show that: The yarn from the machine with this bearing has better quality and without any oil-polluted yarn. And oil cost is only 0.05% of a ordinary oil bearing. As well as its labor is reduced. Thus it can bring greater economic value for enterprises.

scholarly journals Degradation Behavior of Carbon Fiber Reinforced Plastic (CFRP) in Microwave Irradiation

2007 ◽  
Vol 7 (1 & 2) ◽  
pp. 157
Author(s):  
Nguyen Nguyen ◽  
Phuong Ngoc Diem ◽  
Susan A. Roces ◽  
Florinda T. Bacani ◽  
Masatoshi Kubouchi ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Microwave Irradiation ◽  
Bending Strength ◽  
Bending Test ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Cfrp Composites ◽  
Reinforced Plastic ◽  
Carbon Fiber Reinforced

Carbon fiber reinforced plastic (CFRP) composites are being used increasingly not only in strengthening structures of civil infrastructures and aerospace or automotive industries but also in many applications such as in medical fields or chemical plants. The present study relates to resin compositions having beneficial physical and mechanical properties, which may include improved resistance to delamination. This study focused on the different behaviors of CFRP composites when subjected to microwave irradiation. Based on the results of the 3-point bending test and SEM images, the delamination tendencies of breaking the CFRP under microwave were discussed. The results can be summarized as follows: (1) CFRP can be degraded under microwave irradiation; (2) two delamination tendency curves of CFRP by microwave irradiation were observed; (3) only the bending strength values of CFRP decreased with increasing microwave power and residence time; and, (4) the degradation of CFRP by microwave was limited.

Waste size and lay up sequence strategy for reusing/recycling carbon fiber fabric in laminate composite: Mechanical property analysis

2021 ◽  
pp. 002199832110370
Author(s):  
Marcos Yutaka Shiino ◽  
Thais Carolina Gonçalves Cipó ◽  
Maurício Vicente Donadon ◽  
Alexei Essiptchouk
Keyword(s):  
Carbon Fiber ◽  
Mechanical Strength ◽  
Composite Structures ◽  
Bending Strength ◽  
Woven Fabrics ◽  
Bending Test ◽  
Four Point Bending ◽  
A Value ◽  
Strength Based ◽  
Pet Film

Carbon fiber fabrics have been largely used in composite structures as they provide high mechanical strength and potential weigh reduction, allowing more efficiency in product design. However, the production of the parts generates scraps that is discarded as a waste, becoming a challenge to recycle the carbon fiber with predictable mechanical strength. Within this context, this research analyzed strategies of laying up carbon woven fabrics based scraps, in order to reach a desirable mechanical properties in bending loading. Three types of laminates were manufactured using varied fabric size and number of discontinuities in the layup combined with polyethylene terephthalate (PET) film as a matrix. The obtained composites were tested under four-point-bending test and an energy-strength based analysis was conducted. This analysis explained a strategic position of fabric scrap to maximize the bending strength: providing a value of 106.33 MPa for a composite with high number of discontinuities against 83.11 MPa for another with less discontinuity.

Experimental Research on the Flax/PP Thermoplastic Composite Material Hot Pressing Process

2012 ◽  
Vol 573-574 ◽  
pp. 1216-1219 ◽  
Author(s):  
Tao Hai Yan
Keyword(s):  
Composite Material ◽  
Experimental Method ◽  
Influencing Factors ◽  
Experimental Research ◽  
Hot Pressing ◽  
Thermoplastic Composite ◽  
Molding Process ◽  
Pressing Process ◽  
Composite Molding

Flax yarn and PP filament can be made into flax/ pp lapping yarn. Weaving with the lapping yarn, and finally can crank the fabric into PP/ flax composite by hot pressing. Research on the thickness of composite material and the peeling properties of the composite material, we analyzed the correlative factors about the producing technics of composite by orthogonal experimental method. The results showed that the material’s thickness and the technics are the main influencing factors of the wettability, and forecast the technics of composite molding process to get the best wettability properties.

The Discussion of Manufacturing Peanut Hull and TPU Composites by Hot Pressing

2012 ◽  
Vol 518-523 ◽  
pp. 3527-3530
Author(s):  
Xin Yue Wang ◽  
Yong Ling Yu ◽  
Li Hua Lv
Keyword(s):  
Hot Pressing ◽  
Bending Strength ◽  
Orthogonal Experiment ◽  
Matrix Material ◽  
Pressing Pressure ◽  
Range Analysis ◽  
Molding Process ◽  
Pressing Time ◽  
Single Factor Analysis ◽  
Peanut Hull

In order to recycle the waste peanut hull and TPU(thermoplastic urethanes), the composite made from peanut hull powder which was used as reinforcing material and TPU which was used as matrix material by the method of blending and hot pressing was discussed. The parameters of molding process were designed by orthogonal experiment. The tensile property, bending property and impact property of composite materials were tested in this study. The molding process parameters were optimized with the methods of range analysis and single factor analysis. The results showed that the optimum conditions were given as followings: concentration of peanut hull powder was 60%, hot pressing temperature was 170°C, hot pressing pressure was 12Mpa, and hot pressing time was 5min. Under above conditions, excellent mechanic properties were achieved, which were that tensile strength was 19.63MPa, bending strength was 25.74MPa, impact energy absorption was 1.33 KJ/m2.

Bending Behavior of Glass Fiber Grid Reinforced Gussasphalt

2015 ◽  
Vol 744-746 ◽  
pp. 754-757
Author(s):  
Bo Gao ◽  
Min Wang ◽  
Zeng Heng Hao
Keyword(s):  
Composite Material ◽  
High Temperature ◽  
Glass Fiber ◽  
Bending Strength ◽  
Bending Test ◽  
Material Technology ◽  
Bending Performance ◽  
Three Point Bending ◽  
Bending Strain ◽  
Bending Behavior

In combination with the composite material technology, add the glass fiber grid into gussasphalt deck pavement system to form glass fiber grid reinforced gussasphalt. Analysis shows that adding the grid can increase the bending performance. Three point bending test was did to do verification and results were indicate that glass fiber grid can improve the anti-bending strength and anti-bending strain in high temperature.

scholarly journals Mechanical Characterization of DCPD and ENB Healing Systems in Glass Fibre Composites

2020 ◽  
Vol 57 (1) ◽  
pp. 278-289 ◽  
Author(s):  
Ionut Sebastian Vintila ◽  
Teodor Badea ◽  
Sorin Draghici ◽  
Horia Alexandru Petrescu ◽  
Andreia Cucuruz ◽  
...  
Keyword(s):  
Composite Material ◽  
Thermal Cycling ◽  
Glass Fibre ◽  
Bending Strength ◽  
Mechanical Characterization ◽  
Bending Test ◽  
Glass Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced

The present paper is focused on evaluating the mechanical characterization of dicyclopentadiene (DCPD) and 5-ethylidene-2-norbornene (ENB) healing systems synthetized by in-situ polymerisation. Both healing systems were embedded in glass fibre reinforced polymer (GFRP) composite and subjected to three-point bending test regime. Microstructural and FT-IR analysis showed the formation of microcapsules and a successful integration in the composite material. To observe the influence of temperature variation, some specimens were exposed to thermal cycling (-20oC to +100oC) for 12 hours and tested in the same conditions. It was observed that the addition of microcapsules in the composite material decreased its mechanical properties by 8% and 10% for DCPD system and ENB system respectively. Thermal cycling suggested a drop of 24% on bending strength for DCPD system and 17% for ENB. Resting after 24 hours showed a healing recovery of 74% for DCPD healing system and of 97% for ENB system.

Influence of Extrusion Temperature on Property of Graphene Oxide-carbon Fiber Hybrid Reinforced Resin Matrix Composites

2021 ◽  
Author(s):  
Yuqin Ma ◽  
Fei Li ◽  
Wei Xu ◽  
Long Yan ◽  
Haiyin Guo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Carbon Fiber ◽  
Performance Test ◽  
Bending Strength ◽  
Extrusion Temperature ◽  
Resin Matrix ◽  
Strengthening Effect ◽  
Molding Process ◽  
The Matrix

Abstract The graphene oxide-carbon fiber hybrid reinforced resin matrix (GO-CF/EP) composites were prepared by vacuum infiltration hot-pressing molding process. The effects of extrusion temperature on the microstructure, fracture mechanism and mechanical properties of GO-CF/EP composites were investigated by setting different extrusion temperatures. In the experiments, the extrusion temperature was controlled as 30℃, 40℃, 50℃, 60℃ and 70℃ respectively. It was found that the best mechanical property of composites and infiltration effect of matrix in the fiber gap were obtained at the temperature of 50℃. The bending strength of the material reached 977 MPa through the performance test. The results showed the matrix viscosity was high and the fluidity was poor when the extrusion temperature was low. Poor penetration of the matrix resulted in a large number of fibers failing to bond together. The stress was difficult to transfer to other fibers through the matrix and the strengthening effect of graphene oxide (GO) was weak when the composite was subjected to external force. This phenomenon led to poor mechanical properties of composites. Under the condition of higher temperature, the flow speed of the matrix and the curing speed of composites could be improved. As a result, some of the matrix was solidified in advance while being pressed out, which led to cracks and other defects in the process of loading and affects the mechanical properties of the composites. However, the mechanical properties of the composites with higher extrusion temperature were better than those with lower extrusion temperature due to the existence of graphene oxide in the fiber gap.

Research About Key Factors in Jet Puncturing Process for Multilayer Composite Material

2014 ◽  
Author(s):  
Yiyong Yao ◽  
Liping Zhao ◽  
Sheng Hu ◽  
Rongya Zhou ◽  
Mei Zheng
Keyword(s):  
Composite Material ◽  
Carbon Fiber ◽  
Laminated Composite ◽  
Fluid Simulation ◽  
Carbon Cloth ◽  
Multilayer Composite ◽  
High Modulus ◽  
Key Factors ◽  
Molding Process ◽  
Multilayer Composite Material

In the traditional molding process of laminated carbon fiber reinforced C/C composites - preform, it always causes great damage to a high modulus carbon fiber. Research about key factors for jet puncture in multilayer composite material is proposed in this paper. With the method, carbon fiber is added into the laminating direction of high-modulus carbon cloth by using jet method, so the preform is combined together to improve interlayer fiber connection strength in laminating direction (Z direction). Firstly, the key factors in jet puncture process are investigated. Parameter optimization and dynamic modeling of jet process have been studied to explore the mechanism of jet puncture process. Then a fluid simulation is conducted by studying the formation and distribution of diffusion flow field, jet resistance, penetration ability and jet kinetic energy loss. Finally, the fluid software is used to simulate and obtain the optimal structure of carbon cloth and the nozzle. It is expected that this paper can provide a new and effective approach for Z-puncture reinforcement fibers of laminated composite materials.

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