Paper number 670
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COMPOSITE BOUNDARY-EFFECTS COMPUTATIONAL MODELLING |
X. Aubard1, L. Champaney2, C. Cluzel2,3, L. Guitard2, P. Ladevèze2
1Société Européenne de Propulsion
Le Haillan BP37 33165 St MEDARD-EN-JALLES (France)
2LMT Cachan - E.N.S. de Cachan / C.N.R.S. / Univ. P. et M. CURIE
61, avenue du Président Wilson 94235 CACHAN Cedex (France)
3IUT GMP EVRY - Cours Mrg Roméro 91000 EVRY (France)
| Summary | This paper deals with problems of yarn debonding. Taking into account this type of damage is very important to predict the rupture of structures made with 4D Carbon/Carbon composite. This type of damage occurs principally in that material near free surfaces. This is due to an edge effect which modifies the local distribution of the stresses near a free surface. The study of this phenomenon is made at a meso scale with 3 constituents: the fibers, the matrix and the interfaces. A non-linear-damage model is introduced for the interface. Large scale F. E. calculations are done using special numerical methods adapted to such problems: a domain decomposition approach associated with the LATIN method. |
Keywords | 4D Carbon/Carbon - Damage mechanics - Computations - Edge effects. |