Systems and methods of constructing composite assemblies
A method of constructing a cured composite assembly includes positioning a composite assembly within a bonding tool, wherein the composite assembly comprises an uncured composite spar and a skin and performing a curing cycle on the composite assembly to simultaneously cure the uncured composite spar and bond the skin to the cured composite spar.
1. A composite assembly having a leading edge and a trailing edge, comprising:
an upper skin assembly extending between the leading edge and the trailing edge and comprising an upper spar key;
a lower skin assembly extending between the leading edge and the trailing edge and comprising a lower spar key;
a leading edge spar that is disposed between the upper skin assembly and the lower skin assembly and extends to the leading edge of the composite assembly:
an elongated spar dam that is disposed between the upper skin assembly and the lower skin assembly between the upper spar key and the lower spar key: and
a core disposed between the upper skin assembly and the lower skin assembly and aft of the spar;
wherein the upper spar key comprises a flanged portion that extends towards the lower skin assembly and is disposed aft of the spar and fore of the core and the lower spar key comprises a flanged portion that extends towards the upper skin assembly.
2. The composite assembly of claim 1 , wherein the core has a fore end distal the trailing edge, an aft end proximal the trailing edge and a chord line extending between the fore and aft ends and wherein the core comprises a support layer extending between the fore and aft ends of the core along the chord line.
3. The composite assembly of claim 1 , further comprising a spar dam having a fore surface in engagement with an aft end of the spar and an aft surface in engagement with the upper spar key and the lower spar key.
4. The composite assembly of claim 3 , wherein the spar dam is compacted into the aft end of the spar.
5. The composite assembly of claim 1 , wherein the upper spar key and the lower spar key comprise a structural foam.
6. The composite assembly of claim 1 , further comprising a tapered back wall having a concave fore surface in engagement with the spar, an upper angled surface in engagement with the upper spar key, and a lower angled surface in engagement with the lower spar key.
7. A composite assembly having a leading edge and a trailing edge, comprising:
an upper skin assembly extending between the leading edge and the trailing edge;
a lower skin assembly extending between the leading edge and the trailing edge;
a leading edge spar that is disposed between the upper skin assembly and the lower skin assembly and extends to the leading edge of the composite assembly:
an elongated spar dam that is disposed between the upper skin assembly and the lower skin assembly between an upper spar key and a lower spar key: and
a core disposed between the upper skin assembly and the lower skin assembly, wherein the core has a fore end distal the trailing edge, an aft end proximal the trailing edge and a chord line extending between the fore and aft ends;
wherein the core comprises a support layer extending between the fore and aft ends of the core along the chord line.
8. The composite assembly of claim 7 , wherein the support layer comprises an epoxy.
9. The composite assembly of claim 7 , wherein the upper skin assembly comprises a spar key having a flanged portion that extends towards the lower skin assembly and is disposed aft of the spar and fore of the core.
10. The composite assembly of claim 9 , further comprising a spar dam having a fore surface in engagement with the spar and an aft surface in engagement with the spar key.
11. The composite assembly of claim 7 , further comprising a tapered back wall having a concave fore surface in engagement with the spar and an aft surface in engagement with the core.
12. The composite assembly of claim 7 , further comprising: an abrasion strip assembly having a concave inner surface in engagement with an outer surface of the spar; and a strap disposed about the outer surface of the spar and a convex outer surface of the abrasion strip assembly.