METHOD OF CREATING COMPOSITE COMPONENTS WITH A PREFORM WITH HYBRID LAYUP

摘要

The invention relates to a method for manufacturing a thin structural component (1) made of composite and intended to withstand, on the one hand, working loads and, on the other hand, accidental loadings. The method involves creating a dry fibre preform (2) of the component that is to be manufactured, and impregnating the said preform with a matrix-forming resin by resin transfer. The preform (2) is created by assembling at least one structural layer (22), a first surface reinforcing layer (21) on a first face (221) of the said structural layer, and a second surface reinforcing layer (23) on a second face (222) of the structural layer (22). A number of plies in the two surface reinforcing layers (21, 23) is first of all calculated so that the finished component (1) will be able to withstand the accidental loadings, then a number of plies in the structural layer (22) is calculated, with due consideration given to increases in structural strength contributed by the surface reinforcing layers (21, 23) so that the finished component (1) will be able to withstand the working loads.