Acta metall.mater. 41, 2833-2843, 1994


INFLUENCE OF THE FIBER ARRANGEMENT ON THE
MECHANICAL AND THERMO-MECHANICAL
BEHAVIOR OF SHORT FIBER REINFORCED MMCs

E.Weissenbek and F.G. Rammerstorfer

Institute of Lightweight Structures and Aerospace Engineering and
Christian Doppler Laboratory for Micromechanics of Materials,
TU Wien, Vienna, Austria


Abstract - A unit cell approach is used to investigate the influence of the fiber arrangement (periodic and perturbed periodic) on the thermo-mechanical behavior of aligned short fiber reinforced MMCs. Two configurations are compared, staggered and unstaggered fibers, with the first one describing a more realistic composite. Whereas the global behavior of the composite is not strongly influenced by the arrangement, the local microstresses were found to differ significantly in the investigated arrangements. The failure behavior is considered at the microlevel via a damage indicator.


(hjb,960626)