PI-SHAPED PREFORM WITH BIAS FIBERS

摘要

A woven preform (300) for a reinforced composite material, which may be woven flat and folded into shape. The preform has off-axis reinforcement with one or more legs (315,320) and/or base (310) extending in an off axis or bias (non 0/90 dgeree) orientation with respect to the warp/weft fibers (312,314). One or more legs extend from a base, the base and legs each having at least two layers of warp fibers. The legs may be parallel or angled to each other. The outer ends of the base and/or the legs may have tapers formed from terminating layers of warp fibers in a stepped or angled pattern.