scholarly journals RESISTÊNCIA AO IMPACTO DE COMPÓSITOS DE FIBRA DE CARBONO E RESINA EPÓXI EM COMPARAÇÃO AO AÇO SAE 1010

2018 ◽  
Vol 4 (1) ◽  
pp. 0127-0142
Author(s):  
Giovanni de Carvalho Mazarim ◽  
Gigliola Salerno
Keyword(s):  
Composite Material ◽  
Carbon Fiber ◽  
Fiber Orientation ◽  
Charpy Impact ◽  
Impact Behavior ◽  
Low Density ◽  
Resin Composites ◽  
Composites Materials ◽  
Epoxy Resin Composites ◽  
The Impact

A indústria automobilística visa desenvolver veículos com melhor desempenho e os materiais compósitos atingem este quesito pois apresentam alta resistência mecânica e baixa densidade. Visando aplicar tal material para a confecção da proteção das polias CVT de um carro BAJA, este trabalho tem como objetivo estudar o comportamento ao impacto dos materiais compósitos, variando a orientação das fibras, em comparação ao aço 1010. Foram conduzidos ensaios de impacto Charpy no material metálico e no compósito nas configurações unidirecionais (0° e 90°), 0°/90°, ±45° e 0°/90°/±45°. Os resultados obtidos mostraram influência dos defeitos gerados no processamento e a absorção de maiores valores de energia decorrente dos mecanismos de liberação de energia dos materiais compósitos. Adicionalmente, foi observado que a configuração ±45° apresentou um melhor desempenho, sendo a melhor opção.The industry is increasingly required to develop vehicles with better performance and composites materials are often the first option due their high mechanic resistance combined with low density. In order to apply this material on CVT protection of BAJA style car, this work main purpose was to study the impact behavior of the carbon fiber and epoxy resin composites, varying the fiber orientation, and compare to the SAE 1010 steel. For that reason, it were performed Charpy impact tests on the steel and on the unidirectional (0° and 90°), 0°/90°, ±45° and mixed (0°/90°±45°) configurations composite material. The results showed that defects inserted during the manufacturing process provided a huge influence on their energy absorbed. It was seen that higher energy absorbed occurred due damage mechanisms release energy. As a conclusion, the ±45° showed the best performance.

The Effects of Fiber Orientation on the Vibration Modal Behavior of Carbon Fiber Plain Woven Fabric/Epoxy Resin Composites

2011 ◽  
Vol 391-392 ◽  
pp. 345-348 ◽  
Author(s):  
Xiao Yuan Pei ◽  
Jia Lu Li
Keyword(s):  
Carbon Fiber ◽  
Epoxy Resin ◽  
Natural Frequency ◽  
Fiber Orientation ◽  
Volume Fraction ◽  
Damping Ratio ◽  
Woven Fabric ◽  
Resin Composites ◽  
Fiber Volume ◽  
Epoxy Resin Composites

The modal properties of carbon fiber woven fabric / epoxy resin composites with different fiber orientation angles were studied by using single input single output free vibration of cantilever beam hammering modal analysis method. With the same fiber volume fraction, the different fiber orientation of the laminated composite has an effect on parameters of vibration mode of composites. The experimental results show that with the fiber orientation increasing, the natural frequency of laminated composites becomes smaller and damping ratio becomes larger. The fiber orientation smaller, the peak value of natural frequency becomes higher and the attenuating degree of acceleration amplitude becomes slower.

The Effects of Fiber Volume Fraction on the Experiment Modal Behavior of 45°/-45° Carbon Fiber Plain Woven Fabric/Epoxy Resin Composites

2012 ◽  
Vol 583 ◽  
pp. 150-153
Author(s):  
Qian Liu ◽  
Xiao Yuan Pei ◽  
Jia Lu Li
Keyword(s):  
Carbon Fiber ◽  
Epoxy Resin ◽  
Natural Frequency ◽  
Fiber Volume Fraction ◽  
Volume Fraction ◽  
Laminated Composites ◽  
Woven Fabric ◽  
Resin Composites ◽  
Fiber Volume ◽  
Epoxy Resin Composites

The modal properties of carbon fiber woven fabric (with fiber orientation of 45°/-45°) / epoxy resin composites with different fiber volume fraction were studied by using single input and single output free vibration of cantilever beam hammering modal analysis method. The effect of different fiber volume fraction on the modal parameters of laminated composites was analyzed. The experimental results show that with the fiber volume fraction increasing, the natural frequency of laminated composites becomes larger and damping ratio becomes smaller. The fiber volume fraction smaller, the peak value of natural frequency becomes lower and the attenuating degree of acceleration amplitude becomes faster.

scholarly journals Durability and Electrical Conductivity of Carbon Fiber Cloth/Ethylene Propylene Diene Monomer Rubber Composite for Active Deicing and Snow Melting

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2051
Author(s):  
Shuanye Han ◽  
Haibin Wei ◽  
Leilei Han ◽  
Qinglin Li
Keyword(s):  
Composite Material ◽  
Carbon Fiber ◽  
Ethylene Propylene Diene Monomer ◽  
Snow Melting ◽  
Epdm Rubber ◽  
Ethylene Propylene ◽  
Carbon Fiber Cloth ◽  
Rubber Composite ◽  
The Impact ◽  
Functional Components

To reduce the impact of road ice and snow disaster, it is necessary to adopt low energy consumption and efficient active deicing and snow melting methods. In this article, three functional components are combined into a conductive ethylene propylene diene monomer (EPDM) rubber composite material with good interface bonding. Among them, the mechanical and electrical properties of the composite material are enhanced by using carbon fiber cloth as a heating layer. EPDM rubber plays a mainly protective role. Further, aluminum silicate fiber cloth is used as a thermal insulation layer. The mechanical properties of EPDM rubber composites reinforced by carbon fiber cloth and the thermal behaviors of the composite material in high and low temperature environments were studied. The heat generation and heat transfer effect of the composite were analyzed by electrothermal tests. The results show that the conductive EPDM rubber composite material has good temperature durability, outstanding mechanical stability, and excellent heat production capacity. The feasibility of the material for road active deicing and snow melting is verified. It is a kind of electric heating deicing material with broad application prospects.

Effects of UV Light and Moisture Absorption on the Impact Resistance of Three Different Carbon Fiber-Reinforced Composites

2014 ◽  
Author(s):  
V. Patlolla ◽  
J. George ◽  
Soo-Han Loo ◽  
R. Asmatulu
Keyword(s):  
Carbon Fiber ◽  
Moisture Absorption ◽  
Uv Light ◽  
Load Capacity ◽  
Contact Angles ◽  
Impact Testing ◽  
Impact Response ◽  
Uv Exposure ◽  
Impact Behavior ◽  
The Impact

The purpose of this research was to determine the influence of material properties on the impact response of a laminate, whereby specimens were fabricated and cured under a vacuum and high temperature using three types of pre-impregnated (prepreg), carbon fibers, namely unidirectional fiber, plain weave woven fiber, and non-crimp fiber (NCF). Each carbon fiber panel, usually known for its low-impact properties, of 16 plies underwent impact testing using a low-velocity impactor and visual damage inspection by C-scan in order to measure the damage area and depth, before and after impact testing. These panels were treated with UV exposure and moisture conditioning for 20 days each. Water contact angles were taken into consideration to determine the hydrophobicity and hydrophillicity of the respective prepreg materials. Experimental results and damage analysis showed that UV exposure and moisture conditioning showcased the variation in impact response and behavior, such as load-carrying capacity, absorbed energy, and impact energy of the carbon fiber panels. This study illustrates that non-crimp carbon fiber laminates were far more superior relative to load capacity than woven and unidirectional laminates, with the NCF-AS laminate exhibiting the highest load capacity of 17,244 lb/in (pre-UV) with only 0.89% decrease after UV exposure. This same laminate also had a 1.54% decrease in sustaining impact and 31.4% increase in wettability of the panel. Moreover, the study shows how symmetric and asymmetric stacking sequences affect the impact behavior of non-crimp fiber laminates. These results may be useful for expanding the capacity of carbon fiber, lowering costs, and growing new markets, thus turning carbon fiber into a viable commercial product.

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