A multi-fiber unit cell for prediction of transverse properties in metal matrix composites

In this thesis two Multi Fiber Models (MFM) of a unit cell were developed, in an attempt to reduce the current discrepancies between finite element predictions and experimental data. The boundary conditions of the unit cell were shifted in these models away from the fiber-matrix interface, in order to account for the effects of neighboring fibers on the distribution of stresses through the MFM. The results generated by the proposed models were examined by assuming two different scenarios of conditions at the fiber-matrix interface: unbonded and fully bonded.; The models developed in this study were used to predict the residual stresses and the transverse stiffness of Alumina/Titanium (Al2O3/Ti-6Al-4Va) composite. The finite element results were compared with those obtained from the classical Unit Cell Models. The accuracy of the models developed in this thesis, is reflected through a good agreement with the experimental results available from published literature. A parametric study was conducted to investigate the effect of fiber volume fraction on the magnitudes and distributions of residual stresses. The influence of fiber packing pattern on the transverse stiffness of CFMMC materials is also studied in this thesis, both for square array packing and hexagonal array packing. (Abstract shortened by UMI.)...