Fiber Carbon Matrix Composites

The effectiveness of using the thermal input for EB crosslinking of carbon-fiber composite matrix materials to reduce dose was shown by M. Lavalle. Proper combinations of monomer, sulfur and metals subjected to ionizing radiation were found to produce nano-particles that could be of use in electronic applications. 

Composites. Various composite materials have evolved over the years as a significant class of high performance textile products. The prototype composite is carbon fiber with an epoxy resin matrix for stmctural akcraft components and other aerospace and military appHcations. Carbon fiber composites ate also used in various leisure and spotting items such as golf clubs, tennis rackets, and lightweight bicycle frames. However, other types of appHcations and composites ate also entering the marketplace. For example, short ceUulose fiber/mbbet composites ate used for hoses, belting, and pneumatic tire components. 

Using a method suggested by Saint-Flour and Papirer [100], Schultz and Lavielle obtained A// -values for the interaction of several vapors of differing donor numbers and acceptor numbers with various treated and untreated carbon fibers used in the preparation of carbon fiber-epoxy matrix composites. was expressed as ... 

Carbon-doped silicon carbide, 22 535 Carbon electrodes, 12 305, 752-758 furnaces using, 12 753 grades of, 72 754 in open-arc furnaces, 72 301 production of, 72 755 properties of, 72 755-756 Carbon elimination, in steelmaking, 23 258 Carbon fiber, 77 214-215 Carbon fiber ceramic-matrix composites, 26 773... 

Carbon fiber-PEEK, 26 764 Carbon fiber polymer-matrix composites, properties of, 26 774... 

Fiber-reinforced polymer matrix composites UD carbon fiber-epoxy matrix ... 

Fig. 2.5. Modulus data as a function of distance from the fiber surface of a carbon fiber-epoxy matrix composite which are measured from nanoindentation experiments. After Williams et al. (1990).

Fig. 2.18. (a) Transmission WAXS scans of pure PEEK sheets of thickness I mm (b) reflection WAXS scans of carbon fiber-PEEK matrix composites. After Lee (1989). 

Filiou, C., Galiotis, C. and Batchelder, D.N. (1992). Residual stress distribution in carbon fiber/ thermoplastic matrix pre-impregnated composite tapes. Composites, 23, 29-38. 

Fig. (a) Typical load-displaccnicnt curve and (b) acoustic emission events for a fiber fragmentation test on an AS4 carbon fiber PEEK matrix composite. After Vautcy and Favre (1990). 

Fig. 3,4. Ln-Ln plot of fiber fragment length as a function of fiber stress (a) for Kevlar 29 fiber-epoxy matrix composite and (b) for a carbon fiber-epoxy matrix composite. Yabin et al. (1991).

Fig. 3.27. Effect of the interface shear strength on mechanical properties of carbon fiber-epoxy matrix composites ( ) tran.sverse tensile strength (A) maximum transverse tensile strain (O) transverse tensile modiilns. After Madhukar and Drzal (1991),...

Interface properties of carbon fiber-epoxy matrix composites and Weibull parameters of carbon fibers"... 

Fig. 4.8. Variations of debond length, t, as a function of applied stress, for different coefficients of friction, p, for a XAIOO carbon fiber-epoxy matrix composite. After Zhou et al. (1995a, b).

Fig. 4.23. Plot of parlial debond stress, as a function of debond length, (. for a carbon fiber-epoxy matrix composite. After Kim ct al, (1992).

Fig. 4.26. Comparisons between experiments and theory of (a) maximum debond stress, trj, and (b) initial frictional pull-out stress for carbon fiber-epoxy matrix composites. After Kim et al. (1992).

Fig. 4,40. Distributions of interface shear stress, r, along the fiber length at a constant applied stress o = 4.0GPa for carbon fiber-epoxy matrix composites in fiber pull-out and fiber push-out. After...

Fig. 5.17. Comparison between the compressive and tensile (a) strengths and (b) moduli of carbon fiber-epoxy matrix composites with three types of fiber surface condition. AU-4 without surface treatment AS-4 with surface treatment AS-4C with coating of pure epoxy after surface treatment. After Drzal and...

Fig. 5.18. Comparison of shear strengths of carbon fiber-epoxy matrix composites determined from three dificrcnt test methods. Fiber surface conditions as in Fig. 5.17. After Drzal and Madhukar (1993).

In using Eq. (6.10) to predict / , of a given composite system it is important that the said failure mechanisms all exist. If any one mechanism is apparently absent the corresponding toughness term must be excluded from the / t equation. It is also worth emphasizing that / , varies linearly with reciprocal of the frictional shear strength of the interface, i.e. l/tf, with the lower limit of (1 — Ff)/fm when if approaches infinity. This relationship has been shown to apply to many carbon fiber polymer matrix composites (CFRPs) (Harris et al., 1971 Beaumont and Phillips,... 

Fig. 7.4. Fracture toughness (O) and flexural strength ( ) of silicone rubber coated carbon fiber-epoxy matrix composites as a function of coating thickness. After Hancox and Wells (1977).

Fig. 7.5. (a) Transverse impact fracture toughness and (b) fiber pull-out length versus testing temperature for carbon fiber-epoxy matrix composites with and without PVAL coatings on fibers. After Kim and... 

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