WOVEN FIBROUS PREFORM FOR MANUFACTURING A FAN BLADE MADE OF COMPOSITE MATERIAL

• Main Authors: COUPE, Dominique, Marie, Christian, MARCHAL, Yann, Didier, Simon
• Format: Patent
• Language: English; French; German
• Published: 29.11.2023
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; HEATING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; LIGHTING; LOOMS; MACHINES OR ENGINES IN GENERAL; MAKING GRANULES OR PREFORMS; MECHANICAL ENGINEERING; METHODS OF WEAVING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; STEAM ENGINES; TEXTILES; TRANSPORTING; WEAPONS; WEAVING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WOVEN FABRICS

A three-dimensional fibrous preform of a fan blade includes a blade root and a blade airfoil between the blade root and a free end of the preform. The airfoil has an area with two skins and a longitudinal stiffener between the skins and, in a transverse plane, transverse yarns of the skins woven in pairs in the first and in the second skin either side of the stiffener, the yarns of a first pair of the first skin are separated into two unit yarns at the stiffener, the unit yarns being woven separately with longitudinal yarns, the yarns of a second pair of the second skin are separated into two unit yarns at the stiffener, the yarns being woven separately with longitudinal yarns, and a yarn of each pair cross over each other twice in the stiffener.