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The stress distribution of fiber bridging in the crack-face contact region behind the crack tip is considered for a carbon fiber-reinforced carbon matrix laminal composite (2D-C/C-composite). The suppression of stress intensity factor is resulted from the crack-face fiber bridging behind the crack-tip. Based on the equilibrium of mechanical moment between the external load and the internal bridging...
Unidirectional composites were fabricated with fibers of different modulus (HT, IM, HM) and different surface treatments using various thermoplastics as the matrix. Mechanical properties were determined and correlated with the properties of the fibers. The interlaminar shear strength is shown to be controlled by the work of the adhesion as determined from contact angle measurements. Strong supporting...
A one-dimensional model was developed for the forced flow-thermal gradient chemical vapor infiltration of carbon/carbon composites. The infiltration time predicted by the model agreed very well with experiments, where propylene and propane were used as the hydrocarbon source. The model was also validated by interrupting the infiltration and comparing predicted with observed densities.
A coating of boron carbide on carbon fibres was found to be a suitable method for preventing the chemical reactions between the fibre carbon and an aluminium matrix during the fabrication of a composite material by a squeeze-casting process. Such a coating is also interesting since it has an excellent oxidation resistance. Unfortunately, the mechanical properties of composites are not always reproducible;...
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