Duct assembly for a gas turbine engine

1. A gas turbine engine duct assembly comprising:

a composite duct body including at least one rim;

a flanged bracket includes a radially extending portion defining a flange and an axially extending portion having an inner duct rim recess for accepting a portion of the at least one rim; and

at least one attachment plate having a projection recess for accepting a projection on the flanged bracket and an outer rim recess for accepting a portion of the at least one rim, wherein the projection includes a first axially facing projection surface extending in a first plane perpendicular to a central longitudinal axis of the flanged bracket and a second axially facing projection surface extending in a second plane perpendicular to the central longitudinal axis of the flanged bracket and the projection includes a first axially facing projection surface extending in a first plane perpendicular to a central longitudinal axis of the flanged bracket and a second axially facing projection surface extending in a second plane perpendicular to the central longitudinal axis of the flanged bracket.

2. The assembly of claim 1 , wherein the projection includes a radially outward facing projection surface having a constant radial dimension between the first axially facing projection surface and the second axially facing projection surface.

3. The assembly of claim 1 , wherein an inner surface of the composite duct body at least partially defines a bypass flow path.

4. The assembly of claim 1 , wherein the at least one rim includes a larger cross section than a body portion of the composite duct body.

5. The assembly of claim 1 , wherein the at least one rim includes a cross section having a diameter greater than a thickness of a body portion of the composite duct body.

6. The assembly of claim 1 , wherein the projection forms a continuous circumferential lip surrounding a perimeter of a radially outer surface of the axially extending portion.

7. The assembly of claim 1 , wherein the at least one rim includes a plurality of structural layers and shaping material surrounding by continuous outer fibers.

8. An attachment device for a bypass duct in a gas turbine engine comprising:

a flanged bracket including

a radially extending portion at least partially defining a flange;

an axially extending portion extending from a radially inner edge of the radially extending portion having a duct recess for accepting a portion of a duct and a projection extending radially outward from a radially outer surface of the axially extending portion; and

at least one attachment plate including a projection recess for accepting the projection, the at least one attachment plate is axially offset from the radially extending portion, and a fastener opening extends through the projection recess and is aligned with a fastener opening in the projection.

9. The device of claim 8 , further comprising a fastener extending through the fastener opening in the bracket recess and the fastener opening in the projection.

10. The device of claim 8 , wherein the at least one attachment plate includes an outer duct recess for accepting a portion of the rim of the duct and the outer duct recess is at least partially axially aligned with the inner duct recess.

11. The device of claim 8 , wherein the projection includes a first axially facing projection surface extending in a first plane perpendicular to a central longitudinal axis of the flanged bracket and a second axially facing projection surface extending in a second plane perpendicular to the central longitudinal axis of the flanged bracket.

12. The device of claim 11 , wherein the projection recess includes a first axially facing recess surface in abutting contact with the first axially facing projection surface and a second axially facing recess surface in abutting contact with the second axially facing projection surface.

13. A method of assembling a gas turbine engine duct comprising the steps of:

locating a first portion of a rim of a composite duct in an inner rim recess on an axially extending portion of a flanged bracket; and

locating at least one attachment plate adjacent the axially extending portion, wherein the at least one attachment plate includes an outer rim recess for accepting a second portion of the rim and a projection recess for accepting a projection extending radially outward from the axially extending portion; and

locating at least one fastener through the projection recess on the at least one attachment plate and the projection on the flanged bracket.

14. The method of claim 13 , wherein the projection includes a first axially facing projection surface extending in a first plane perpendicular to a central longitudinal axis of the flanged bracket and a second axially facing projection surface extending in a second plane perpendicular to the central longitudinal axis of the flanged bracket.

15. The method of claim 13 , wherein the projection recess includes a first axially facing recess surface in abutting contact with the first axially facing projection surface and a second axially facing recess surface in abutting contact with the second axially facing projection surface.