Patent ID: 8852709

Claim:
A composite material part comprising: first zone with a thickness E 1 and a second zone with a thickness E 2 , wherein: the composite material is made as a single part with a transition zone between the first and second zones, external surfaces of which have gradients of magnitude P 1 , P 2 ; a stack structure of the part comprises: a first outer section including a first plurality of continuous outer plies that extend in the first zone, the second zone, and the transition zone, the first plurality of continuous outer plies being adjacent to each other along an entirety of their lengths, a second outer section including a second plurality of continuous outer plies that extend in the first zone, the second zone, and the transition zone, the second plurality of continuous outer plies being adjacent to each other along an entirety of their lengths, a first intermediate section including a plurality of plies that extend in the first zone and in the transition zone, terminating in a stepped manner in the transition zone so as to compensate for a difference in thickness between the first and second zones corresponding to the gradient P 1 , and a second intermediate section including a plurality of plies that extend in the first zone and in the transition zone, terminating in a stepped manner in the transition zone so as to compensate for a difference in thickness between the first and second zones corresponding to the gradient P 2 ; and the first intermediate section is adjacent to the first outer section and the second intermediate section is adjacent to the second outer section.