Welding and Riveting Hybrid Bonding of 6061 Al and Carbon Fiber Reinforced Composites

Welding and riveting hybrid bonding technology was applied to join 6061 aluminum alloy and carbon fiber reinforced plastics (CFRP). The laser-arc hybrid welding process and stepped rivets were used in the experiments to reduce the impact of the poor heat resistance of composites. The effect of hybrid welding arc current on the formation and mechanical properties of 6061 Al/CFRP joints was studied. Tensile shear load up to 4.65 kN was achieved by adjusting process parameters. The welding process and mode of the fracture were analyzed. The hybrid bonded joint obtained consisted of two parts: a welded joint of Al plate and Al rivet, and a bonded interface between Al plate and CFRP plate. The mechanical properties of the hybrid joint were mainly determined by the Al plate/Al rivet welded joint. The results of the study show that there are three interfacial bonding mechanisms between aluminum and CFRP. In addition to mechanical bonding between the Al plate and CFRP plate, there were also metallurgical bonding of Al-Mg intermetallic compounds with resin matrix and chemical reactions of aluminum with resin and carbon fibers at the interface, which could improve the mechanical properties of the joints.

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Study on Dynamic Mechanical Properties of Carbon Fiber Reinforced Concrete

Materials Science Forum ◽

10.4028/www.scientific.net/msf.976.180 ◽

2020 ◽

Vol 976 ◽

pp. 180-185

Author(s):

Gao Jie Liu ◽

Er Lei Bai ◽

Jin Yu Xu ◽

Bo Xu Meng ◽

Teng Jiao Wang ◽

...

Keyword(s):

Mechanical Properties ◽

Reinforced Concrete ◽

Carbon Fiber ◽

Fiber Reinforced Concrete ◽

Peak Strain ◽

Fiber Reinforced ◽

Fiber Volume ◽

Deformation Properties ◽

Carbon Fiber Reinforced ◽

The Impact

The strength and deformation properties of carbon fiber reinforced concrete under different fiber volume loadings under impact loading were studied by using the ɸ100 mm split Hopkinson pressure bar (SHPB) test system. The results show that after the carbon fiber is added, the stress-strain curve of the specimen shows the platform section at the peak stress. The strength and peak strain of the concrete under the impact load increase first and then decrease with the increase of the carbon fiber volume. Trend, when the carbon fiber volume is 0.2%, the impact mechanical properties of concrete are significantly improved.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.791-793.506 ◽

2013 ◽

Vol 791-793 ◽

pp. 506-509 ◽

Cited By ~ 2

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.

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Durability study of pultruded carbon fiber reinforced polymer plates subjected to water immersion

Advances in Structural Engineering ◽

10.1177/1369433217732664 ◽

2017 ◽

Vol 21 (4) ◽

pp. 571-579 ◽

Cited By ~ 14

Author(s):

Bin Hong ◽

Guijun Xian ◽

Zike Wang

Keyword(s):

Mechanical Properties ◽

Carbon Fiber ◽

Water Immersion ◽

Fiber Reinforced Polymer ◽

Carbon Fiber Reinforced Polymer ◽

Resin Matrix ◽

Fiber Reinforced ◽

Reinforced Polymer ◽

Carbon Fiber Reinforced

Pultruded carbon fiber reinforced polymer plates have been widely used for structural rehabilitation due to their excellent mechanical properties. Even though, the long-term durability performance of carbon fiber reinforced polymer plates is still a concern, especially when subjected to harsh environmental conditions (e.g. water immersion). In the present study, the effects of water immersion at 23°C, 40°C, and 60°C on the degradation of the pultruded carbon fiber reinforced polymer plates were investigated in terms of water uptake and mechanical properties. To elucidate the degradation mechanisms, the resin matrix and the fiber and resin adhesion were also assessed in the same conditions. The test results indicated that water immersion, especially at higher temperatures, leads to serious fiber debonding, and thus the carbon fiber reinforced polymer samples absorb much more water than the resin matrix. In addition, the transverse flexural strength of the carbon fiber reinforced polymer plates, closely correlated to the fiber–resin adhesion, reduced significantly at high temperatures. On the contrary, the resin matrix and carbon fiber reinforced polymer plates show much less degradation subjected to the same immersion conditions. Therefore, to comprehensively understand the long-term durability of a carbon fiber reinforced polymer material, it is necessary to test the variation of the bonding strength between fiber and resin matrix, in addition to the tensile performances in fiber directions of the carbon fiber reinforced polymer plates.

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The impact of prepreg aging on its processability and the postcure mechanical properties of epoxy-based carbon-fiber reinforced plastics

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications ◽

10.1177/1464420716665413 ◽

2016 ◽

Vol 231 (1-2) ◽

pp. 62-72 ◽

Cited By ~ 2

Author(s):

D Blass ◽

S Kreling ◽

K Dilger

Keyword(s):

Mechanical Properties ◽

Carbon Fiber ◽

Shelf Life ◽

Aviation Industry ◽

Fiber Reinforced ◽

Carbon Fiber Reinforced Plastics ◽

Reinforced Plastics ◽

Fiber Reinforced Plastics ◽

Carbon Fiber Reinforced ◽

The Impact

Due to the intention to increase the product efficiency by weight reduction, the application of carbon fiber reinforced plastics and its processing becomes more and more important for the industrial production planning. The aviation industry mostly uses epoxy-based preimpregnated laminates (prepregs). These prepregs are stored in the refrigerated state and may be processed after defrosting only for a specific shelf-life or so-called out-time. This limitation in processing time reduces the efficiency of the entire production, for example due to the waste of material during production stops. To improve the production effectiveness the shelf-life should be as high as possible, to be able to avoid material waste during production stops. Therefore, the processability and the postcure mechanical properties of two representative prepregs were investigated during this study for different aging stages and correlated with the reactivity of the prepregs.

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