Method for repairing a wall consisting of a plurality of layers

A method of repairing a wall (1), notably a composite wall, comprising:

• a plurality of layers (2), each layer comprising fibers (3) extending in a main direction (4), and having a damaged area (5) affecting the plurality of layers (2), said repair method comprising:
• removing a material by hollowing out the wall (1) to produce a hollowed out area (6) encompassing the damaged area (5), the hollowed out area including a peripheral area (7) including steps (8), the height of each step is equal to the thickness of one of the layers, each step (8) defines an interface area (9) that is coplanar with a junction plane between a lower layer and an upper layer lying below and above said junction plane,
• producing a replacement part (12) adapted to block the hollowed out area (6), the replacement part includes superposed replacement layers having thickness adapted to the height of the steps to cover each level (11) defined by the steps, the replacement layers include fibers oriented in the main direction of the fibers of the lower layer;
• and
• assembling the replacement part (12) to the wall (1),
• the interface area (9) having a width (10) greater in the main direction (4) of the fibers (3) of the lower layer adjoining said interface area (9) than said width (10) in directions other than the main direction (4);
• wherein during the removing step, the hollowed out area (6) and the steps (8) are produced using the high-pressure water jet cutting technique.

A method of repairing a wall (1), notably a composite wall, comprising:

• a plurality of layers (2), each layer comprising fibers (3) extending in a main direction (4), and having a damaged area (5) affecting the plurality of layers (2), said repair method comprising:
• removing a material by hollowing out the wall (1) to produce a hollowed out area (6) encompassing the damaged area (5), the hollowed out area including a peripheral area (7) including steps (8), the height of each step is equal to the thickness of one of the layers, each step (8) defines an interface area (9) that is coplanar with a junction plane between a lower layer and an upper layer lying below and above said junction plane,
• producing a replacement part (12) adapted to block the hollowed out area (6), the replacement part includes superposed replacement layers having thickness adapted to the height of the steps to cover each level (11) defined by the steps, the replacement layers include fibers oriented in the main direction of the fibers of the lower layer;
• and
• assembling the replacement part (12) to the wall (1),
• the interface area (9) having a width (10) greater in the main direction (4) of the fibers (3) of the lower layer adjoining said interface area (9) than said width (10) in directions other than the main direction (4);
• wherein a replacement part (12) is produced having superposed replacement layers (13) with thicknesses adapted to the heights of the steps (8);
• wherein a replacement part (12) is produced, each replacement layer of which comprises fibers (3) oriented in a predetermined preferred direction and in that the fibers (3) of each of the replacement layers are oriented in the main direction (4) of the fibers (3) of the lower layer of the wall (1) adjoining the interface area (9) to be covered by said replacement layer.