scholarly journals Hydrogen bonds, interfacial stiffness moduli, and the interlaminar shear strength of carbon fiber-epoxy matrix composites

AIP Advances ◽  
2015 ◽  
Vol 5 (3) ◽  
pp. 037125 ◽  
Author(s):  
John H. Cantrell
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Hydrogen Bonds ◽  
Epoxy Matrix ◽  
Interlaminar Shear Strength ◽  
Matrix Composites ◽  
Interfacial Stiffness ◽  
Interlaminar Shear ◽  
Carbon Fiber Epoxy

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.

DEGRADATION OF CARBON FIBER/EPOXY COMPOSITES BY XE LAMP AND HUMIDITY

2006 ◽  
Vol 20 (25n27) ◽  
pp. 3686-3691 ◽  
Author(s):  
XIAOJUN LV ◽  
QI ZHANG ◽  
GUOJUN XIE ◽  
GUANJIE LIU
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Epoxy Composite ◽  
Interlaminar Shear Strength ◽  
Epoxy Composites ◽  
Radiation Temperature ◽  
Transverse Tensile ◽  
Interlaminar Shear ◽  
Transverse Tensile Strength ◽  
Carbon Fiber Epoxy

In order to understand the effect of natural environmental factors on the carbon fiber/epoxy composites, the degradation of carbon fiber/epoxy composite was studied. The specimens were exposed in a Xe lamp chamber and suffered to ultraviolet light radiation, temperature and/or humidity conditions. The results show that the radiation, temperature and/or humidity could cause extensive corrosion to the surface and interior of the carbon/epoxy composite and attack the interface between matrix and carbon fiber, resulting in an obvious reduction of the transverse tensile strength and interlaminar shear strength. On the contrary, the longitudinal transverse shear strength was not affected much by the radiation, temperature and/or humidity. The results indicate that the radiation, temperature and/or humidity can result in the corrosion of the carbon/epoxy composite and consequently affect the mechanical properties of the carbon/epoxy composite partially.

Incorporation of Carbon Nanotubes on Strategically De-Sized Carbon Fibers for Enhanced Interlaminar Shear Strength of Epoxy Matrix Composites

2019 ◽  
Vol 41 (4) ◽  
pp. 655-655
Author(s):  
Muhammad Abdul Basit Muhammad Abdul Basit ◽  
Sybt e anwar Qais Sybt e anwar Qais ◽  
Muhammad Saffee Ullah Malik and Ghufran Ur Rehman Muhammad Saffee Ullah Malik and Ghufran Ur Rehman ◽  
Faizan Siddique Awan Faizan Siddique Awan ◽  
Laraib Alam Khan and Tayyab Subhani Laraib Alam Khan and Tayyab Subhani
Keyword(s):  
Carbon Nanotubes ◽  
Shear Strength ◽  
Carbon Fibers ◽  
Epoxy Matrix ◽  
Interlaminar Shear Strength ◽  
Matrix Composites ◽  
Multiwalled Carbon ◽  
Shear Properties ◽  
Functionalized Multiwalled Carbon Nanotubes ◽  
Interlaminar Shear

Carbon fiber reinforced polymeric matrix composites are enormously used in aerospace and automotive industries due to their enhanced specific properties. However, the area of interlaminar shear properties still needs investigation so as to produce composites with improved through-the-thickness properties. To improve interlaminar shear properties of these composites, acid-functionalized multiwalled carbon nanotubes were deposited on de-sized carbon fibers through electrophoretic deposition. De-sizing of carbon fabric was performed through three different methods: furnace heating, acidic treatment and chloroform usage. As the acid-treatment provided better results than other two techniques, the acid-de-sized carbon fibers were coated with nanotubes and subsequently incorporated in epoxy matrix to prepare a novel class of multiscale composites using vacuum assisted resin transfer molding technique. Nearly 30% rise in the interlaminar shear strength of the composites was obtained which was credited to the coating of nanotubes on the surface of carbon fibers. The increased adhesion between carbon fibers and epoxy matrix due to mechanical interlocking of nanotubes was found to be the possible reason of improved interlaminar shear properties.

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