The Boeing Company
Placement of modifier material in resin-rich pockets to mitigate microcracking in a composite structure

Abstract:

A composite structure may include a resin, a fiber at least partially embedded within the resin, and one or more resin-rich pockets associated with the fiber. The composite structure may include modifiers in the one or more resin-rich pockets. The modifier may have at least one modifier characteristic that is different than a resin characteristic for altering the resin characteristics within the resin-rich pockets and thereby mitigating or preventing crack initiation or crack growth within the resin-rich pockets of the composite structure.