Micromechanics prediction of the shear strength of carbon fibre/epoxy matrix composites: the influence of the matrix and interface strengths

Carbon fibre reinforced plastics (CFRPs) can be classified according to whether the matrix is a thermoset or a thermoplastic. Thermoset-matrix composites are by tradition far more common, but thermoplastic-matrix composites are gaining in importance. There are several techniques for combining carbon fibres with a thermoplastic-matrix system. The composite’s characteristics as well as its manufacturing costs are dependent on the impregnation technique of the carbon fibre and the textile structure respectively. Carbon fibre reinforced thermoplastics (CFRTPs) are suitable for fast and economic production of high-performance components. Despite the higher material costs thermoplastic-matrix systems show cost benefits in comparison to thermoset-matrix due to substantial time savings in the production process. Moreover CFRTPs can be manufactured in large production runs. The commingling of reinforcement fibres with matrix fibres is a well-established process. Another approach is the coating of the carbon fibre with a thermoplastic subsequent to the carbon fibre production (carbonization, activation and deposition of sizing). The latter point is currently subject of research and is a promising method for further increasing the production speed. This paper presents the different possibilities of impregnating carbon fibres with a thermoplastic matrix. Diverse technologies along the process chain of the CFRTP production will be discussed.

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The effect of surface treatment on the interfacial properties in carbon fibre/epoxy matrix composites

Journal of Materials Science ◽

10.1007/bf00349908 ◽

1995 ◽

Vol 30 (13) ◽

pp. 3543-3546 ◽

Cited By ~ 16

Author(s):

G. Bogoeva-Gaceva ◽

D. Burevski ◽

A. Dekanski ◽

A. Janevski

Keyword(s):

Carbon Fibre ◽

Surface Treatment ◽

Epoxy Matrix ◽

Interfacial Properties ◽

Matrix Composites ◽

Effect Of Surface

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The Effect of Moisture on the Properties of Glass Fiber Polymer Matrix Composites with MoS2 and CaCO3

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.f9090.088619 ◽

2019 ◽

Vol 8 (6) ◽

pp. 4800-4806

Keyword(s):

Mechanical Properties ◽

Water Absorption ◽

Glass Fiber ◽

Epoxy Matrix ◽

Polymer Matrix Composites ◽

Tap Water ◽

Matrix Composites ◽

Fiber Reinforced ◽

Glass Fiber Reinforced ◽

The Matrix

The mechanical properties and water absorption behavior of a pure glass fiber reinforced epoxy matrix and a glass fiber reinforced epoxy filled composites immersed into a tap water were investigated. The main purpose of this experiment is addition of two different powdered fillers (CaCO3 and MoS2 ) into the epoxy matrix and comparing the properties of pure GFRP and filled GFRP. The composites specimens with fillers absorb less water when compared to pure GFRP specimens at room temperature. Water absorption curves and equilibrium moisture content were determined. The composites exhibit a positive deviation from the Fickan’s law with the addition of fillers into the matrix. The influence of water uptake has significant effect on the reduction of mechanical properties. It is observed that 3% filled MoS2 in epoxy matrix has less uptake of water and the tensile strength decreased is 3% , flexural strength decreased up to 18% and shear strength is 42% decreased when compared to CaCO3 filled composites and unfilled glass fiber reinforced polymer composite.

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

Journal of the chemical society of pakistan ◽

10.52568/000783/jcsp/41.04.2019 ◽

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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Interfacial Properties of As-Received and Coated SiC (SCS-6) Fiber Reinforced Reaction-Formed SiC Matrix Composites

MRS Proceedings ◽

10.1557/proc-365-365 ◽

1994 ◽

Vol 365 ◽

Author(s):

Paula J. Gaeta ◽

Richard D. Sisson ◽

M. Singh ◽

Jeffrey I. Eldridge

Keyword(s):

Shear Strength ◽

Interfacial Shear Strength ◽

Interfacial Shear ◽

Ceramic Fiber ◽

Second Phase ◽

Matrix Composites ◽

Fiber Reinforced ◽

Strength Failure ◽

Sic Fiber ◽

The Matrix

ABSTRACTThe possibility of improving the interfacial shear strength of the SiC fiber reinforced SiC matrix composite system was examined. A ceramic fiber coating was chosen based on availability and chemical stability with the fiber and matrix. Fiber push-out tests conducted on as-received and coated fiber reinforced composite samples allowed characterization of the interfacial shear strength. Average debond shear and frictional sliding stresses were calculated. The effects of sample thickness and second phase addition in the matrix were also evaluated. Tested samples were examined by SEM to determine the location of the interfacial failure and to determine if any interface reactions had occurred. The coating was then evaluated based on the resulting interfacial shear strength, failure location, and integrity of the interface as compared to those properties of samples reinforced with as-received fibers.

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