PREFORM PRECURSOR FOR FIBER-REINFORCED COMPOSITE MATERIAL, PREFORM FOR FIBER-REINFORCED COMPOSITE MATERIAL, AND METHOD OF MANUFACTURING THE PRECURSOR AND THE PREFORM

摘要

A preform precursor for fiber-reinforced composite material and a preform for fiber-reinforced composite material, the preform precursor comprising an outer peripheral side portion as an area (a) where a predicted bent curve and a plurality of reinforcing fibers partially positioned along the predicted bent curve are arranged parallel with each other in a flat surface area or a curved surface having a specified extent and an inner peripheral portion where a plurality of reinforcing fibers crossing at an angle with the reinforcing fibers are disposed over the entire area to form a portion (b) only with the latter reinforcing fibers; the preform for fiber-reinforced composite material comprising a portion bent along the predicted bent curve, a flange part formed of the outer peripheral portion, and a semi-tubular part formed by bending the inner peripheral side portion. partially