NEEDLE PUNCHING OF COMPOSITES FOR PREFORM ASSEMBLY AND THERMOMECHANICAL ENHANCEMENT

摘要

A method of forming a composite preform containing multiple laminates is disclosed. The method may include providing a first sublaminate comprising stacked fibers woven into a fabric; providing a second sublaminate comprising stacked fibers woven into a fabric; joining the first sublaminate and the second sublaminate forming a component comprising a region of discontinuity sandwiched between the first sublaminate and the second sublaminate; rigidizing the component; and softening the region between the first sublaminate and the second sublaminate. In illustrative embodiments, the method may include manipulating the region of discontinuity between the first sublaminate and the second sublaminate to reduce the incoherence between the sublaminates by moving fibers from the sublaminates through at least part of the region between the first sublaminate and the second sublaminate.

主权项

1. A method of forming a composite preform containing multiple laminates, the method comprising
providing a first sublaminate comprising stacked SiC fibers woven into a fabric; providing a second sublaminate comprising stacked SiC fibers woven into a fabric; joining the first sublaminate and the second sublaminate forming a component comprising a region of discontinuity sandwiched between the first sublaminate and the second sublaminate; rigidizing the component; softening the region between the first sublaminate and the second sublaminate; and manipulating the region of discontinuity between the first sublaminate and the second sublaminate to reduce the incoherence between the sublaminates by moving SiC fibers from the sublaminates through at least part of the region.