MANUFACTURE OF FIBER PREFORM FOR PRODUCTION OF COMPOUND MATERIAL CONSTITUENT PART CONSISTING OF STACKED LAYERS WITH SMALL CURVATURE RADIUS

摘要

PURPOSE: To provide a fibrous reinforcement preforms without gaps between layers even in a curved portion having a small radius of curvature. CONSTITUTION: In a curved portion of a preform having a radius of curvature that is smaller than the thickness of a plurality of superposed layers 12, an insert 14 is introduced between to of the layers. The insert 14 comprises a first curved surface 14a having a first radius of curvature substantially equal to that of a surface of the layer adjacent an outer side of the preform, and a second curved surface 14b having a second radius of curvature greater than the first radius of curvature and substantially equal to that of a layer adjacent an inner side of the preform.