Composite wing structure and methods of manufacture

Patent metadata

Field	Value
Publication number	US-10814567-B2
Application number	US-201916244295-A
Country	US
Kind code	B2
Filing date	Jan 10, 2019
Priority date	Feb 8, 2016
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

In one aspect, there is a method of making a pre-cured laminate having a total number of plies in a mold, the mold having a cavity with a periphery defined by a forward edge, an aft edge, and outboard ends. The method includes selecting a first plurality of resin impregnated plies that continuously extend beyond the periphery of the cavity, the first plurality of resin impregnated plies includes at least 50 percent of the total number of plies; laying the plies in a mold; compacting the plies in a mold; and pre-curing the plies to form a pre-cured laminate, which can extend beyond the periphery of the cavity. In an embodiment, a pre-cured laminate includes a first plurality of resin impregnated plies that continuously extend beyond the periphery of the cavity.

First claim

What is claimed is:

1. A pre-cured laminate having a total number of plies formed in a mold, the mold having a cavity with a periphery defined by a forward edge, an aft edge, and outboard ends, comprising:
a first plurality of resin impregnated plies that continuously extend beyond the periphery of the cavity, the first plurality of resin impregnated plies comprises at least 50 percent of the total number of plies; and
a second plurality of resin impregnated plies that do not extend beyond the forward edge and continuously extend beyond the aft edge, the second plurality of resin impregnated plies comprises from about 15 percent to about 25 percent of the total number of plies.

2. The pre-cured laminate of claim 1 , wherein the first plurality of resin impregnated plies comprises from about 50 percent to about 75 percent of the total number of plies.

3. The pre-cured laminate of claim 1 , further comprising:
a third plurality of resin impregnated plies that do not extend beyond the aft edge and continuously extend beyond the forward edge.

4. The pre-cured laminate of claim 3 , wherein the third plurality of resin impregnated plies comprises from about 15 percent to about 25 percent of the total number of plies.

5. The pre-cured laminate of claim 3 , wherein a portion of the third plurality of plies do not extend beyond the outboard end.

6. The pre-cured laminate of claim 5 , wherein the portion of the third plurality of plies that do not extend beyond the outboard end comprises from about 3 percent to about 7 percent of the total number of plies.

7. The pre-cured laminate of claim 3 , further comprising:
a fourth plurality of resin impregnated plies that do not extend beyond the outboard ends and continuously extend beyond the forward and aft edges.

8. The pre-cured laminate of claim 7 , wherein the fourth plurality of resin impregnated plies comprise from about 5 percent to about 50 percent of the total number of plies.

9. The pre-cured laminate of claim 1 , wherein the total number of plies is from about 8 plies to about 100 plies.

10. The pre-cured laminate of claim 1 , wherein the resin impregnated plies are made from a fiber selected from the group consisting of glass, carbon, graphite, basalt, and aramid.

11. The pre-cured laminate of claim 1 , wherein the resin impregnated plies comprise at least one of a woven fabric and a tape.

Assignees

• Bell Helicopter Textron Inc

Inventors

• Carlson David G
• Mccullough John R
• Wolfe Douglas K
• Baines Andrew G
• Decker George R

Classifications

• B29C70/34 Primary

  and shaping or impregnating by compression {, i.e. combined with compressing after the lay-up operation} · CPC title

• B29C70/302 Primary

  Details of the edges of fibre composites, e.g. edge finishing or means to avoid delamination · CPC title

• Y02T50/40

  Weight reduction · CPC title

• B32B3/12

  characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure · CPC title

• B29D99/0089

  Producing honeycomb structures (consisting of porous ceramic ware C04B38/0006) · CPC title