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Fatigue behaviour of a C/C-composite under interlaminar shear loading conditions

 
: Soltesz, U.; Thielicke, B.; Schäfer, R.

Degallaix, S.; Bathias, C.; Fougeres, R. ; Societe Francaise de Metallurgie et de Materiaux -SF2M-, Paris:
International Conference on Fatigue of Composites 1997. Proceedings
Paris, 1997
International Conference on Fatigue of Composites <1997, Paris>
Societe Francaise de Metallurgie et de Materiaux (International Spring Meeting) <8, 1997, Paris>
Englisch
Konferenzbeitrag
Fraunhofer IWM ()
carbon/carbon composite; ceramic composites; compression shear test; fatigue; fibre reinforced carbon; interlaminar shear strength; long-time behaviour

Abstract
The fatigue behaviour of a carbon fibre reinforced carbon under interlaminar shear loading conditions was investigated at room temperature. Two different testing procedures were applied: the conventional short-beam-bending test and a new compression-shear test. It can be shown that the new approach tests the interlaminar properties more sensitively and critically because it produces a predominant, nearly homogeneous shear stress between the laminates and, as a consequence, causes pure shear failure. The bending test, on the other side, is additionally influenced by the fibres. The Interlaminar Shear Strength values determined under compression-shear are remarkably smaller and their deterioration with increasing cycling number is more pronounced. This means that the new test describes better the influence of the matrix which dominates all interlaminar processes.

: http://publica.fraunhofer.de/dokumente/PX-13977.html