Robust feedback designs for consolidation of metal matrix composites

Consolidation of fiber reinforced metal matrix composite preforms at high temperatures seeks to eliminate matrix porosity while minimizing fiber microbending/fracture and the growth of reaction products at the fiber-matrix interface. This paper evaluates to what extent uncertainty in geometry and material parameters affects the final microstructural attributes of the composite. Then several design methods and feedback control designs for robust regulation of consolidation are presented. Efficacy of the methods and designs are illustrated by exploring the design of process schedules for the Ti-6Al-4V/SCS-6 titanium matrix composite with variability in the matrix creep properties.