The properties and structure of the carbon fibre in carbon/carbon produced on the basis of carbon fibre reinforced phenolic resin

Lüdenbach, G.; Peters, P.W.M.; Ekenhorst, Derk; Müller, Bernd R.

doi:10.1016/s0955-2219(98)00069-7

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…1a). (iv) Beyond 1470 K mainly annealing reactions and reactions in the fiber occur [29], leading to further shrinkages in the composite specimens (see Fig. 1b).…”

Section: Chemistry Of the Pyrolysis And Its Influence On Mass And Vol...mentioning

confidence: 99%

Discrete element simulation of transverse cracking during the pyrolysis of carbon fibre reinforced plastics to carbon/carbon composites

Wittel

Schulte-Fischedick

Kun

et al. 2003

Computational Materials Science

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The fracture behavior of fiber-ceramics like C/C-SiC strongly depends on the initial damage arising during the production process. We study the transverse cracking of the 90 • ply in [0/90] S cross-ply laminates due to the thermochemical degradation of the matrix material during the carbonization process by means of a discrete element method. The crack morphology strongly depends on the fiber-matrix interface properties, the transverse ply thickness as well as on the carbonization process itself. To model the 90 • ply a twodimensional triangular lattice of springs is constructed where nodes of the lattice represent fibers. Springs with random breaking thresholds model the disordered matrix material and interfaces. The spring-lattice is coupled by interface springs to two rigid bars which capture the two 0 • plies or adjacent sublaminates in the model. Molecular dynamics simulation is used to follow the time evolution of the model system. It was found that under gradual heating of the specimen, after some distributed cracking, segmentation cracks occur in the 90 • ply which then develop into a saturated state where the ply cannot support additional load. The dependence of the micro-structure of damage on the ply thickness and on the disorder in spring properties is also studied. Crack density and porosity of the system are monitored as a function of the temperature and compared to an analytic approach and experiments.

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“…1a). (iv) Beyond 1470 K mainly annealing reactions and reactions in the fiber occur [29], leading to further shrinkages in the composite specimens (see Fig. 1b).…”

Section: Chemistry Of the Pyrolysis And Its Influence On Mass And Vol...mentioning

confidence: 99%

Discrete element simulation of transverse cracking during the pyrolysis of carbon fibre reinforced plastics to carbon/carbon composites

Wittel

Schulte-Fischedick

Kun

et al. 2003

Computational Materials Science

View full text Add to dashboard Cite

show abstract

“…A quantitative estimation of how much each of the involved phenomena contribute to the recovery of the strength is not possible as all phenomena take place simultaneously. The complexity of the structural change of the loose fibre bundle and bundles embedded in a phenolic resin as a result of heat treatment has been investigated in detail [11].…”

Section: Discussion Of Resultsmentioning

confidence: 99%