Repair of composite sandwich structures

• US 8,642,158 B2
• Filed: 03/28/2011
• Issued: 02/04/2014
• Est. Priority Date: 06/19/2006
• Status: Expired due to Fees

• Current Assignee: Raytheon Technologies Corporation d/b/a RTX (Rtx Corporation)
• Original Assignee: United Technologies Corporation (Rtx Corporation)
• Inventors: Bogue, William, Ringler, Richard B.
• Primary Examiner(s): Sample, David
• Assistant Examiner(s): Jordan, Nicholas W
• Application Number:
  US13/072,925
• Publication Number:
  US 20110177285A1
• Time in Patent Office: 1,044 Days
• Field of Search: 428/73, 428116-118, 428 77- 79, 428 98-104, 156/98, 156/214, 156/216, 181/292, 244/123.13, 244/123.6, 244/131, 244/132, 294/62, 294/64, 2940201-40221, 298/971, 248/675, 524/811, 527/831, 403/204, 403/205, 403/286, 403/292, 403/293, 403/294, 403/295, 403/340, 403/341
• US Class Current: 428/116
• CPC Class Codes: B29C 73/06 using plugs sealing in the hole
• CPC Class Codes: B29C 73/10 using patches sealing on the surface of the article B29C73/14 takes precedence
• CPC Class Codes: B29L 2031/608 Honeycomb structures
• CPC Class Codes: Y10T 156/1056 Perforating lamina
• CPC Class Codes: Y10T 156/1082 Partial cutting bonded sandwich [e.g., grooving or incising]
• CPC Class Codes: Y10T 403/66 Interfitted members with external bridging piece
• CPC Class Codes: Y10T 428/236 Honeycomb type cells extend perpendicularly to nonthickness layer
• CPC Class Codes: Y10T 428/24149 Honeycomb-like
• CPC Class Codes: Y10T 428/24157 Filled honeycomb cells [e.g., solid substance in cavities, etc.]

Abstract

A composite component includes a honeycomb, a skin bonded to the honeycomb, a repair section bonded adjacent to the skin, and at least one cover secured on at least a portion of the repair section to resist peeling of the repair section.

Claims

1. A composite component comprising:

a honeycomb;

a skin bonded to the honeycomb;

a repair section bonded adjacent the skin; and

at least one cover secured on at least a portion of the repair section to resist peeling of the repair section, wherein the skin includes first perforations and the at least one cover includes second perforations that are aligned with the first perforations, wherein the at least one cover includes a first surface secured on at least the portion of the repair section and a second surface that extends in a direction transverse to the first surface, wherein the second surface extends into the honeycomb.

2. The composite component as recited in claim 1, further comprising an adhesive that bonds the second surface to the honeycomb.

3. The composite component as recited in claim 1, further comprising an opposing cover adjacent the at least one cover, and a tie cover that bonds the opposing cover and the at least one cover together.

4. The composite component as recited in claim 3, wherein the opposing cover comprises a first surface that extends over the repair section, and a second surface transverse to the first surface, wherein the at least one cover comprises a first surface that extends over the skin adjacent the repair section, and a second surface transverse to the first surface.

5. The composite component as recited in claim 4, wherein the second surface of the opposing cover and the second surface of the at least one cover are parallel and disposed at an axial end of the repair section.

6. The composite component as recited in claim 1, wherein the repair section includes third perforations aligned with the second perforations of the at least one cover.

7. The composite component as recited in claim 1, wherein the at least one cover includes a first cover secured on at least the portion of the repair section and a tie cover secured on the first cover.

8. The composite component as recited in claim 1, wherein the repair section and the skin are made of substantially the same material.

9. The composite component as recited in claim 1, wherein a portion of the at least one cover is above a face skin surface, and the remainder is imbedded below the face skin surface.

10. The composite component as recited in claim 1, wherein a wire mesh is bonded over the at least one cover and the repair section.

11. The composite component as recited in claim 1, wherein the skin is a face skin, wherein a back skin opposite the face skin is bonded to the honeycomb.

12. The composite component as recited in claim 11, wherein the face skin and the at least one cover are the same material.

13. The composite component as recited in claim 1, wherein the at least one cover secured on the at least a portion of the repair section resists peeling due to air flow.

14. The composite component as recited in claim 1, wherein the repair section comprises a repair face skin bonded to a replacement honeycomb core.

15. The composite component as recited in claim 1, wherein the face skin is a resin matrix with continuous woven fiber reinforcement.

16. The composite component as recited in claim 1, wherein the at least one cover is bonded by adhesive to the at least a portion of the repair section.

17. The composite component as recited in claim 1, wherein the face skin is a resin matrix with continuous woven fiber reinforcement, wherein the at least one cover is bonded by adhesive to the at least a portion of the repair section.