Paper number 1098

IDENTIFICATION OF THE DAMAGE AND FAILURE MECHANISMS OF A 3D CARBON-CARBON COMPOSITE UNDER UNIAXIAL LOADING

C. Crestia¹, S. Calloch¹, A. Cosculluela², F. Hild¹ and D. Marquis¹

1L.M.T. Cachan, 61 avenue du Président Wilson, F - 94235 Cachan, France
2C.E.A. Le Ripault, BP 16, F - 37260 Monts, France

Summary

We identify the damage and failure modes of a 3D carbon-carbon composite loaded in tension along its orthotropy axis z, through the analysis of a series of experiments (e.g. Scanning Electron and Optical Microscopy). We establish that its ultimate strength is mainly due to the z-axis yarns which were not damaged (or little damaged) by specimen machining. The evaluation of the failure strength and the corresponding standard deviation are also discussed.

Keywords

3D carbon-carbon composites, damage and failure mechanisms, uniaxial tensile tests, brittle materials, probabilistic approach.