Hybridization of the fibers of the fibrous reinforcement of a fan blade with elastic fibers

A blade comprising a structure, the structure being made of composite material and comprising a matrix and a fibrous reinforcement, the structure further comprising a pressure-side wall and a suction-side wall;

• wherein the fibrous reinforcement is embedded in the matrix, comprises a first portion forming the suction-side wall of the structure and a second portion forming the pressure-side wall of the structure, and is obtained by three-dimensional weaving of strands, the strands comprising;
• first strands and second strands;
• wherein the first strands comprise carbon or aramid fibers the Young's modulus of which is greater than 250 GPa;
• wherein the second strands are produced from a viscoelastic material and have a Young's modulus less than 10 Gpa;
• wherein the first portion of the fibrous reinforcement comprises uniquely first strands whereas the second portion of the fibrous reinforcement comprises second strands;
• and
• wherein the fibrous reinforcement further comprises a third portion extending between the first portion and the second portion, a density of the second strands gradually increasing in the third portion from the first portion towards the second portion.