Part of composite material having a wedge between two zones

A part (5) manufactured by the laying-up of sheets of composite material which includes a wedge (13) between a first zone (11) and a second zone (15) characterised in that its structure comprises from its outer surface (21) to its inner surface (23):

• a first section (31) formed of at least two continuous sheets (41) extending parallel to the outer surface (21) of the part (5), the gradient of the outer surface (25) of the wedge (13) being between 20% and 50%,
• a wedge (33) in the shape of a triangular prism placed on the said first section (31) with its larger surface (27) dimensioned in such a way that it forms a wedge having a gradient of less than 20% ending at the start of the said second zone (15),
• a second section (35) formed by a plurality of continuous sheets (45) extending parallel to the surface bounded by the said first section (31) with the said wedge (33) placed upon it.