Influence of Laser Process on Mechanical Behavior during Cutting of Carbon Fiber Reinforced Plastic Composites

2014 ◽  
Vol 783-786 ◽  
pp. 1518-1523 ◽  
Author(s):  
Yoshihisa Harada ◽  
Mayu Muramatsu ◽  
Takayuki Suzuki ◽  
Michiteru Nishino ◽  
Hiroyuki Niino
Keyword(s):  
Tensile Strength ◽  
Fatigue Strength ◽  
Carbon Fiber ◽  
Laser Cutting ◽  
Material Behavior ◽  
Resin Matrix ◽  
Fiber Reinforced ◽  
Static Tensile ◽  
Carbon Fiber Reinforced ◽  
Mechanical Cutting

Carbon fiber-reinforced plastics (CFRP) composite is most attractive materials to reduce the weight of transportations. To increase the production volume and the efficiency in the field of CFRP component, fast, highly precise and cost-efficient technologies are required. Although laser cutting meets these requirements, it is not used because of insufficient knowledge about the effect of thermal damage on the material behavior. In this study, the effect of several cutting processes on the static tensile strength and the fatigue strength was evaluated for CFRP consisting of thermoset resin matrix and carbon fibers. The CFRP was cut using two different-type of lasers; a CO2 gas laser and single-mode fiber lasers, and a conventional mechanical tool. The mechanical cutting specimen produced a cut of high quality. While, the laser cutting specimens clearly showed a heat-affected zone (HAZ). The static tensile strength and the fatigue strength by laser cutting specimens clearly decreased in comparison with mechanical cutting specimen. The laser cutting specimen exhibited a linear dependency of the tensile strength on the HAZ, indicating that the main effect resulted from thermal destruction of CFRP within the HAZ.

Evaluation of Cutting Process on the Tensile and Fatigue Strength of CFRP Composites

2012 ◽  
Vol 706-709 ◽  
pp. 649-654 ◽  
Author(s):  
Yoshihisa Harada ◽  
Kyohei Kawai ◽  
Takayuki Suzuki ◽  
Tokuo Teramoto
Keyword(s):  
Tensile Strength ◽  
Fatigue Strength ◽  
Laser Cutting ◽  
Water Jet ◽  
Material Behavior ◽  
Resin Matrix ◽  
Production Volume ◽  
Thermoset Resin ◽  
Water Jet Cutting ◽  
Static Tensile

Carbon fiber-reinforced plastics (CFRP) composite is most attractive materials to reduce the weight of transportations. To increase the production volume and the efficiency in the field of CFRP component, fast, highly precise and cost-efficient technologies are required. Although laser cutting meets these requirements, it is not used because of insufficient knowledge about the effect of thermal damage on the material behavior. In this study, the effect of several cutting processes on the static tensile strength and the fatigue strength was evaluated for CFRP consisting of thermoset resin matrix and carbon fibers. The CFRP was cut using two different-type of lasers; a CO2 gas laser and a single-mode fiber laser, an abrasive water-jet and a conventional mechanical tool. The mechanical cutting specimen produced a cut of high quality. The water-jet cutting specimen showed a moderate quality though was seen a trace of abrasive grain. While, the laser cutting specimens clearly showed a heat-affected zone (HAZ). The static tensile strength and the fatigue strength by laser cutting specimens clearly decreased in comparison with mechanical or water-jet cutting specimen. The laser cutting specimen exhibited a linear dependency of the tensile strength on the HAZ, indicating that the main effect resulted from thermal destruction of CFRP within the HAZ.

Effect of Air Oxidation Treated Carbon Fiber on Mechanical Properties of Carbon Fiber Reinforced Polyethylene Resin Composite

2013 ◽  
Vol 791-793 ◽  
pp. 506-509 ◽  
Author(s):  
Ying Xia Yu ◽  
Bo Lin He ◽  
Li Li
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Carbon Fiber ◽  
Resin Composite ◽  
Resin Matrix ◽  
Fiber Reinforced ◽  
Air Oxidation ◽  
Carbon Fiber Reinforced ◽  
Treated Carbon

The composite of carbon fiber reinforced polyethylene resin was prepared by using a twin-screw extruder. The effect of carbon fiber oxidation treating on the mechanical properties of carbon fiber reinforced polyethylene resin composite was researched. The tensile fracture failure mechanism of composite was analyzed for both untreated and air oxidation treated specimen. The experimental results indicate that when carbon fiber content is equal, the tensile strength and the elastic modulus of air oxidation-treated carbon fiber-reinforced polyethylene composite are improved than that of the untreated. When the fraction of adding carbon fiber is 3.99%, compared with the pure polyethylene resin matrix, the tensile strength, elastic modulus is increased by 13.12% and 172.91%, respectively. Compared to the untreated carbon fiber reinforced polyethylene resin composite, the tensile strength and tensile modulus is increased by 4.71% and 13.14%, respectively.

scholarly journals Experimental Study on Dynamic Splitting Characteristics of Carbon Fiber Reinforced Concrete

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 94
Author(s):  
Zhan-Yang Chen ◽  
Jun Yang
Keyword(s):  
Tensile Strength ◽  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Split Hopkinson Pressure Bar ◽  
Fiber Reinforced Concrete ◽  
Dynamic Responses ◽  
Fiber Reinforced ◽  
Hopkinson Pressure Bar ◽  
Static Tensile ◽  
Carbon Fiber Reinforced

Due to the non-uniform tension and compression strength of concrete, carbon fiber can be added to concrete to improve its static tensile behavior and increase the tension–compression ratio. In view of the destructive consequences of impacts and explosions, it is necessary to study the dynamic responses of carbon fiber reinforced concrete (CFRC) structures. Therefore, the effects of the stress rates and carbon fiber contents on the dynamic tension behavior of CFRC were investigated in this paper. The dynamic splitting tests of concrete with the fiber contents of 0, 0.1, 0.2, and 0.3% were carried out by using a split Hopkinson pressure bar (SHPB) device with a diameter of 74 mm. We found that with the increase of fiber content, the static tensile strength of CFRC increases obviously, but the increased amplitude tends to decrease. The dynamic tensile strength and dynamic increase factor (DIF) both increase with the increase of stress rate, but the growth rate slows down, showing an obvious rate effect. The rate sensitivity of ordinary concrete is higher than CFRC. There are significant differences in the influence of carbon fiber on the dynamic and static strength of concrete. In the design of concrete mixing proportion, the content of carbon fiber should be appropriately selected to meet the requirements of dynamic and static mechanical properties.

Preparation and Tensile Properties of Carbon Fiber Reinforced Polyethylene Resin Composite

2013 ◽  
Vol 791-793 ◽  
pp. 498-501 ◽  
Author(s):  
Bo Lin He ◽  
Ying Xia Yu ◽  
Li Li
Keyword(s):  
Tensile Strength ◽  
Composite Material ◽  
Carbon Fiber ◽  
Tensile Properties ◽  
Volume Fraction ◽  
Fiber Content ◽  
Resin Matrix ◽  
Tensile Fracture ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced

The composite of carbon fiber reinforced polyethylene resin was prepared by using a twin-screw extruder. The effect of carbon fiber content on the tensile properties of the composite of carbon fiber reinforced polyethylene resin was researched. The tensile fracture failure mechanism of composite materials was analyzed. The experimental results indicate that with the increase of the content of carbon fiber in the composite material, the tensile strength and tensile modulus increase gradually. When the carbon fiber content in the composites is 4.02%, compared to the pure polyethylene resin matrix, the tensile strength and tensile elastic modulus is increased by 18.45% and 208.37%, respectively. With the increase of adding amount of carbon fiber and the carbon fiber volume fraction is less than 0.1 in composite material, the stress load subjected by carbon fiber is significantly increased, which is close to the linear relationship.

Research in Recycling Technology of Fiber Reinforced Polymers for Reduction of Environmental Load: Optimum Decomposition Conditions of Carbon Fiber Reinforced Polymers in the Purpose of Fiber Reuse

2011 ◽  
Vol 343-344 ◽  
pp. 142-149 ◽  
Author(s):  
Jian Shi ◽  
Kiyoshi Kemmochi ◽  
Li Min Bao
Keyword(s):  
Tensile Strength ◽  
Carbon Fiber ◽  
Superheated Steam ◽  
Fiber Reinforced Polymers ◽  
Environmental Load ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Carbon Fiber Reinforced ◽  
Recycled Fibers

The objective of the present study is to investigate the effect of pyrolysis time and temperature on the mechanical properties of recycled carbon fiber, based on tensile strength measurements, determining the optimum decomposition conditions for carbon fiber-reinforced polymers (CFRPs) by superheated steam. In this research, CFRPs were efficiently depolymerized and reinforced fibers were separated from resin by superheated steam. Tensile strength of fibrous recyclates was measured and compared to that of virgin fiber. Although tensile strength of recycled fibers were litter lower than that of virgin fiber, under some conditions tensile strength of recycled fibers were close to that of virgin fiber. With pyrolysis, some char residue from the polymer remains on the fibers and degrees of char on the recycled fibers were closely examined by scanning electron microscopy.

scholarly journals Simultaneous load and structural monitoring of a carbon fiber rudder stock: Experimental results from a quasi-static tensile test

2018 ◽  
Vol 30 (2) ◽  
pp. 272-282 ◽  
Author(s):  
Klaus Neuschwander ◽  
Jochen Moll ◽  
Vittorio Memmolo ◽  
Matthias Schmidt ◽  
Marcel Bücker
Keyword(s):  
Carbon Fiber ◽  
Impedance Spectroscopy ◽  
Structural Monitoring ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Electromechanical Impedance ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Static Tensile ◽  
Carbon Fiber Reinforced

Carbon-fiber-reinforced plastics are widely used in lightweight marine structures due to their high strength and superior fatigue behavior. In this article, we will present an innovative methodology for simultaneous load and structural monitoring of a carbon-fiber-reinforced plastic rudder stock as part of a big commercial vessel. Experimental results are presented here from a quasi-static tensile test in which the load monitoring is performed using embedded strain sensors. Structural monitoring is based on high-frequency electromechanical impedance spectroscopy combined with dedicated signal processing and surface-mounted piezoelectric transducers. We have achieved the following results: (1) the demonstration of a hybrid monitoring system including load and structural monitoring, (2) successful embedding of strain gauges during composite manufacturing of the carbon-fiber-reinforced plastic rudder stock, (3) development of instrumentation hardware for multichannel electromechanical impedance measurements, and (4) successful damage detection by means of electromechanical impedance spectroscopy in thick carbon-fiber-reinforced plastic rudder stock samples exploiting strain data.

scholarly journals Experimental investigation of the microstructures and tensile properties of polyacrylonitrile-based carbon fibers exposed to elevated temperatures in air

2019 ◽  
Vol 14 ◽  
pp. 155892501985001 ◽  
Author(s):  
Chenggao Li ◽  
Guijun Xian
Keyword(s):  
Tensile Strength ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Elevated Temperatures ◽  
Tensile Modulus ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

The elevated temperature resistance and even fire resistance of carbon fiber-reinforced polymer composites were critical concerns in many applications. These properties of a carbon fiber-reinforced polymer depend not only on the degradation of the polymer matrix but also on that of the carbon fibers under elevated temperatures. In this study, influences of elevated temperatures (by 700°C for 30 min) in air on the mechanical properties and microstructures of a carbon fiber were investigated experimentally. It was found that the tensile strength and modulus as well as the diameters of the carbon fibers were reduced remarkably when the treatment temperatures exceeded 500°C. At the same time, the content of the structurally ordered carbonaceous components on the surface of carbon fibers and the graphite microcrystal size were reduced, while the graphite interlayer spacing ( d002) was enhanced. The deteriorated tensile modulus was attributed to the reduced graphite microcrystal size and the reduced thickness of the skin layer of the carbon fiber, while the degraded tensile strength was mainly attributed to the weakened cross-linking between the graphite planes.

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