Veil based composite structure repair

Patent metadata

Field	Value
Publication number	US-10913239-B1
Application number	US-201715622653-A
Country	US
Kind code	B1
Filing date	Jun 14, 2017
Priority date	Jun 14, 2017
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

One example includes a repair assembly that is comprised of a composite patch, an adhesive, and a veil. The adhesive is disposed between a composite structure that includes an anomaly to be repaired and the composite patch and the composite patch. The veil is disposed between the composite structure and the composite patch. The veil generates heat in response to electric power being applied to the veil, with the adhesive being cured with the heat generated with the veil to repair the composite structure including the anomaly.

First claim

What is claimed is:

1. A repair assembly, comprising:
a composite patch to repair an anomaly within a composite structure;
an adhesive disposed between the composite structure and the composite patch;
a veil disposed between the composite structure and the composite patch, the veil generating heat in response to electric power being applied to the veil, with the adhesive being cured with the heat generated with the veil to repair the composite structure including the anomaly; and
a temperature sensor disposed between the adhesive and the veil to accurately control curing of the adhesive.

2. The repair assembly of claim 1 , wherein the adhesive is included in an adhesive sheet that is disposed between the composite structure that includes the anomaly to be repaired and the composite patch.

3. The repair assembly of claim 1 , wherein the adhesive is pre-impregnated into the veil prior to the veil being disposed on the composite structure.

4. The repair assembly of claim 1 , wherein the veil is a first veil, the repair assembly further comprising a second veil disposed on the adhesive to further generate heat with the electric power being applied to the second veil.

5. The repair assembly of claim 1 , wherein the veil includes first and second bus bars to distribute the electric power across the veil.

6. The repair assembly of claim 1 , wherein the composite structure and the composite patch are at least one of carbon based materials and fiberglass based materials.

7. The repair assembly of claim 1 , further comprising a vacuum bag affixed to the composite structure over the veil, the adhesive, and the composite patch, the vacuum bag maintaining a vacuum over the veil, the adhesive, and the composite patch while the heat is generated with the electric power being applied to the veil.

8. The repair assembly of claim 1 , further comprising electrodes coupled to the veil.

9. The repair assembly of claim 1 , wherein the composite structure is a portion of an aircraft structure.

10. The repair assembly of claim 1 , further comprising a curing controller to monitor a temperature of the veil and control the heat being generated with the electric power being applied to the veil in response to the monitored temperature.

Assignees

• Crawford John A
• Nardiello Jerrell A
• Madsen John S
• Gilchrist George W
• Weizenecker Charles J
• Northrop Grumman Systems Corp

Inventors

• Crawford John A
• Nardiello Jerrell A
• Madsen John S
• Gilchrist George W
• Weizenecker Charles J

Classifications

• B32B7/12 Primary

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B2605/18

  Aircraft · CPC title

• B32B2605/08

  Cars · CPC title

• B32B2419/00

  Buildings or parts thereof · CPC title

• B32B5/02

  characterised by structural features of a {fibrous or filamentary} layer {(layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02)} · CPC title