US 12,134,982 B2
Strip-form acoustic material having an integrated flange, and internal wall of an aircraft air intake made with this material
Alain Porte, Toulouse (FR); and Jacques Lalane, Toulouse (FR)
Assigned to AIRBUS OPERATIONS SAS, Toulouse (FR)
Filed by Airbus Operations SAS, Toulouse (FR)
Filed on Jul. 28, 2021, as Appl. No. 17/387,554.
Claims priority of application No. 2008163 (FR), filed on Jul. 31, 2020.
Prior Publication US 2022/0034260 A1, Feb. 3, 2022
Int. Cl. F02C 7/04 (2006.01); B32B 1/08 (2006.01); B32B 3/04 (2006.01); B32B 3/06 (2006.01); B32B 3/14 (2006.01); B32B 3/26 (2006.01); B32B 5/02 (2006.01); B32B 5/26 (2006.01); B32B 15/02 (2006.01); B64D 33/02 (2006.01); F02C 7/045 (2006.01)
CPC F02C 7/04 (2013.01) [B32B 1/08 (2013.01); B32B 3/04 (2013.01); B32B 3/06 (2013.01); B32B 3/14 (2013.01); B32B 3/266 (2013.01); B32B 5/02 (2013.01); B32B 5/26 (2013.01); B32B 15/02 (2013.01); B64D 33/02 (2013.01); F02C 7/045 (2013.01); B32B 2260/021 (2013.01); B32B 2260/046 (2013.01); B32B 2262/103 (2013.01); B32B 2307/102 (2013.01); B32B 2605/18 (2013.01); B64D 2033/0206 (2013.01); F05D 2220/323 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An internal wall of an aircraft air intake comprising:
a resistive skin configured to allow acoustic waves to pass through, and
a cellular core configured to damp said acoustic waves,
wherein the resistive skin is made up of a succession, in an orbital direction, of strips of acoustic material, each strip having a length in a longitudinal direction, a width in a transverse direction, a thickness and axial ends, each strip of material being folded in a substantially transverse plane at at least one of the axial ends of the strip, in an end portion of the length of the strip, the folded end portions of the strips forming a rear or front flange for fastening the resistive skin of the air intake internal wall to a frame of the air intake, each strip comprising:
a first layer forming a visible frontal face of the air intake internal wall, said first layer being made of a fiber-reinforced polymer, the first layer being perforated or micro-perforated,
a second layer made up of a metal fabric or of a thin metal sheet or a thin sheet made of thermoplastic material disposed on the first layer on a surface of the first layer opposite the visible frontal face of the air intake internal wall and forming a second frontal face of the air intake internal wall opposite the visible frontal face and further forming a portion of the front or rear flange,
a third layer formed of tapes made of a fiber-reinforced polymer disposed on at least one of the first layer and the second layer such that the third layer forms a portion of the second frontal face of the air intake internal wall, said tapes extending mainly in the longitudinal direction of the strip and being spaced apart from one another in the transverse direction of the strip, the tapes thus forming longitudinal reinforcing crenellations, the first layer not having perforations or micro-perforations next to said tapes,
wherein the folded end portion of the strip does not have perforations or micro-perforations in the first layer, and
wherein the third layer terminates such that the third layer does not extend into the rear or front flange.