scholarly journals Ultrasound assisted process for enhanced interlaminar shear strength of carbon fiber/epoxy resin composites

2010 ◽  
Vol 29 (2) ◽  
pp. 149 ◽  
Author(s):  
Gordana Bogoeva-Gaceva ◽  
Niko Heraković ◽  
Dimko Dimeski ◽  
Viktor Stefov
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Epoxy Resin ◽  
Interlaminar Shear Strength ◽  
Carbon Fiber Composites ◽  
Resin Composites ◽  
Scanning Calorimetry ◽  
Epoxy Resin Composites ◽  
Interlaminar Shear ◽  
Carbon Fiber Epoxy

The influence of ultrasonic treatment, applied during the impregnation of carbon fiber bundle by resin system, on interface sensitive properties of carbon fiber/epoxy resin composites has been analyzed. The formation of the network has been followed on model composites containing untreated, oxidized and epoxy sized fibers by Fourier transform infrared microscopy (FTIR-microscopy) and differential scanning calorimetry (DSC). The enhanced interlaminar shear strength (ILSS), found for the composites treated by ultrasound, is attributed to the formation of more homogeneous and dense network, which is especially pronounced for epoxy sized carbon fiber composites.

scholarly journals Effect of sonication applied during production of carbon fiber/epoxy resin composites evaluated by differential scanning calorimetry and thermo-gravimetric analysis

2011 ◽  
Vol 30 (2) ◽  
pp. 189 ◽  
Author(s):  
Gordana Bogoeva-Gaceva ◽  
Dimko Dimeski ◽  
Niko Heraković
Keyword(s):  
Differential Scanning Calorimetry ◽  
Carbon Fiber ◽  
Thermal Behavior ◽  
Epoxy Resin ◽  
Carbon Fiber Composites ◽  
Gravimetric Analysis ◽  
Resin Composites ◽  
Scanning Calorimetry ◽  
Epoxy Resin Composites ◽  
Carbon Fiber Epoxy

The influence of ultrasonic treatment, applied during the impregnation of carbon fiber bundle byepoxy resin system, on thermal behavior of carbon fiber/epoxy resin composites in the course of crosslinknetworkformation has been analyzed by differential scanning calorimetry (DSC). It was previouslyshown [1] that this treatment has resulted in drastically increased interlaminar shear strength (ILSS) ofthe bulk composites, produced by hot pressing. The enhanced ILSS was attributed to the formation ofmore homogeneous and dense network, as revealed by epoxy consumption rate and increased Tg. In thispaper, DSC analysis is applied to further investigate peculiarities of carbon fiber/epoxy systems, exposed toultrasonic treatment, during isothermal and non-isothermal curing and post-curing. The acceleration of thecuring reaction as a consequence of sonication effects was found for all fiber/polymer systems, regardlessthe surface chemistry of the fibers. The stronger interfacial bond in epoxy sized carbon fiber composites,favored by ultrasound treatment, has also generated differences in thermal behavior of the compositesduring their degradation followed by TGA/DTG.

Microstructure optimizations for improving interlaminar shear strength and self-healing efficiency of spread carbon fiber/epoxy laminates containing microcapsules

2020 ◽  
Vol 55 (1) ◽  
pp. 27-38
Author(s):  
Yasuka Nassho ◽  
Kazuaki Sanada
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Optical Microscope ◽  
Interlaminar Shear Strength ◽  
Self Healing ◽  
Short Beam ◽  
Healing Efficiency ◽  
Beam Shear ◽  
Interlaminar Shear ◽  
Carbon Fiber Epoxy

The purpose of this study is to improve interlaminar shear strength and self-healing efficiency of spread carbon fiber (SCF)/epoxy (EP) laminates containing microcapsules. Microencapsulated healing agents were embedded within the laminates to impart a self-healing functionality. Self-healing was demonstrated on short beam shear specimens, and the healing efficiency was evaluated by strain energies of virgin and healed specimens. The effects of microcapsule concentration and diameter on apparent interlaminar shear strength and healing efficiency were discussed. Moreover, damaged areas after short beam shear tests were examined by an optical microscope to investigate the relation between the microstructure and the healing efficiency of the laminates. The results showed that the stiffness and the apparent interlaminar shear strength of the laminates increased as the microcapsule concentration and diameter decreased. However, the healing efficiency decreased with decreasing the microcapsule concentration and diameter.

Macrophage activation induced by different carbon fiber-epoxy resin composites

1991 ◽  
Vol 25 (5) ◽  
pp. 637-649 ◽  
Author(s):  
G. Peluso ◽  
L. Ambrosio ◽  
M. Cinquegrani ◽  
L. Nicolais ◽  
G. Tajana
Keyword(s):  
Carbon Fiber ◽  
Epoxy Resin ◽  
Macrophage Activation ◽  
Resin Composites ◽  
Epoxy Resin Composites ◽  
Carbon Fiber Epoxy
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