Modelling of the Influence of Fibre Distribution on Residual Stresses and Strength of Titanium Matrix Composites

摘要

Continuous fibre reinforced titanium matrix composites (TMCs) are attractive for future aerospace applications due to their high specific strength and stiffness. Different processing technologies are available to produce parts out of TMCs. Although there is a significant influence of final product quality on mechanical properties of TMCs, i.e. fatigue and tensile strength, little systematic work is accessible today considering the impact of processing on the loading capabilities of TMCs. One important attribute of TMC quality is described by the fibre distribution in the final product. Inhomogeneity's of fibre distribution has been identified as one important factor for strength degradation. To fully utilise the strength potential of TMCs especially under fatigue loading conditions residual stresses need to be avoided. The numerical results of different fibre arrangements are presented and the influence on the residual stress and strength of the composite is discussed.