Reinforced structural component for resisting tensile loading and providing impact resistance

Patent metadata

Field	Value
Publication number	US-11851879-B2
Application number	US-202117490566-A
Country	US
Kind code	B2
Filing date	Sep 30, 2021
Priority date	Feb 2, 2021
Publication date	Dec 26, 2023
Grant date	Dec 26, 2023

Abstract

A reinforced structural component includes a body portion made of a combination of plastic material and chopped fibers. The body portion has a central longitudinal axis and a cross-section orthogonal to the central longitudinal axis, with the cross-section having an outer periphery and an inner core inward of the outer periphery. The body portion has an outer peripheral portion and an inner core portion corresponding to respective longitudinal projections of the outer periphery and inner core. The body portion is configured for being acted upon by a combination of forces causing tension within one or more longitudinal segments of the inner core portion. The reinforced structural component also includes one or more layers of continuous fiber disposed longitudinally within the one or more longitudinal segments, so as to resist tension caused within the one or more longitudinal segments.

First claim

What is claimed is:

1. A reinforced structural component, comprising:
a body portion made with a plastic material and chopped fibers distributed in the plastic material, the body portion having a central longitudinal axis and a cross-section orthogonal to the central longitudinal axis, the cross-section having an outer periphery and an inner core inward of the outer periphery, and the body portion having an outer peripheral portion and an inner core portion corresponding to longitudinal projections of the outer periphery and the inner core, respectively; and
one or more stacks of layers of continuous fibers disposed longitudinally within the body portion, embedded within the inner core portion, spaced inward of the outer periphery, and surrounded by the outer peripheral portion, wherein the continuous fibers are disposed longitudinally within the body portion.

2. The reinforced structural component according to claim 1 , wherein the body portion is configured for bending about a second axis transverse to the central longitudinal axis, and wherein a width of each of the one or more layers of continuous fibers is disposed generally parallel with the second axis.

3. The reinforced structural component according to claim 1 , wherein the plastic material is a thermoplastic material including polyethylene, polypropylene, polystyrene, acrylonitrile-butadiene-styrene, polyvinyl chloride, fluoropolymer, polyamide, polycarbonate, and/or polybenzimidazole.

4. The reinforced structural component according to claim 1 , wherein the chopped fibers are made of carbon, glass, aramid, polyacrylonitrile, graphene, boron, high-modulus polyethylene, and/or poly p-phenylene-2,6-benzobisoxazole.

5. The reinforced structural component according to claim 1 , wherein the continuous fibers are made of carbon fiber, fiberglass, aramid, polyacrylonitrile, and/or graphene.

6. The reinforced structural component according to claim 1 , wherein the cross-section has a hollow profile defining a longitudinal cavity within the body portion.

7. The reinforced structural component according to claim 6 , wherein the cross-section has an inner periphery adjacent the longitudinal cavity such that the inner core separates the inner and outer peripheries from each other.

8. The reinforced structural component according to claim 6 , wherein the body portion is shaped as a single-channel pipe, a multi-channel pipe, a circular pipe, and/or a polygonal pipe.

9. The reinforced structural component according to claim 1 , wherein the cross-section has a solid non-hollow profile.

10. The reinforced structural component according to claim 9 , wherein the body portion is shaped as a rectangular beam, a circular beam, a triangular beam, an I-beam, a C-channel, an L-channel, a T-channel, a flat panel, or a curved panel.

11. The reinforced structural component according to claim 1 , wherein the one or more stacks of layers of continuous fibers includes a first stack of the layers of continuous fibers disposed in a first section of the body portion and a second stack of the layers of continuous fibers disposed in a second section, spaced from the first section, of the body portion.

12. The reinforced structural component according to claim 1 , wherein the cross-section varies in size and/or shape along the central longitudinal axis.

13. The reinforced structural component according to claim 1 , wherein the reinforced structural component is produced by compression molding, extrusion molding, automated fiber placement, autoclave consolidation, thermoplastic welding, and/or manual lay-up.

14. A reinforced structural component, comprising:
an elongate body portion made of a thermoplastic material and chopped fibers distributed throughout the thermoplastic material, the elongate body portion having a central longitudinal axis and a cross-section orthogonal to the central longitudinal axis, the cross-section having an outer periphery and an inner core inward of the outer periphery, the elongate body portion having an outer peripheral portion and an inner core portion corresponding to respective longitudinal projections of the outer periphery and the inner core, wherein the elongate body portion is configured for bending about a second axis transverse to the central longitudinal axis causing tension in the longitudinal direction within one or more longitudinal segments of the inner core portion; and
a plurality of layers of continuous fibers stacked one on top of the other and bonded together in a stack of continuous fiber layers, the stack of continuous fiber layers arrayed longitudinally within the elongate body portion, embedded within the inner core portion, and spaced inward of the outer periphery, and surrounded by the outer peripheral portion of the elongate body portion, wherein all of the continuous fibers are disposed longitudinally within the body portion.

15. The reinforced structural component according to claim 14 , wherein a width of each of the layers of continuous fibers is disposed generally parallel with the second axis.

16. The reinforced structural component according to claim 14 , wherein the cross-section varies in size and/or shape along the longitudinal direction.

17. The reinforced structural component according to claim 14 , wherein the elongate body portion is shaped as a single-channel pipe, a multi-channel pipe, a circular pipe, a polygonal pipe, a rectangular beam, a circular beam, a triangular beam, an I-beam, a C-channel, an L-channel, a T-channel, a flat panel, or a curved panel.

18. A structural component for an aircraft, comprising:
an elongate body portion made of a thermoplastic material and chopped fibers distributed throughout the thermoplastic material, the elongate body portion having a central longitudinal axis and a cross-section orthogonal to the central longitudinal axis, the cross-section having an outer periphery and an inner core inward of the outer periphery, the elongate body portion having an outer peripheral portion and an inner core portion corresponding to respective longitudinal projections of the outer periphery and inner core, wherein the elongate body portion is configured for bending about a second axis transverse to the central longitudinal axis causing tension in the longitudinal direction within one or more longitudinal segments of the inner core portion; and
a plurality of stacks of layers of continuous fibers arrayed longitudinally within the elongate body portion, embedded within the inner core portion, all spaced inward of the outer periphery, and surrounded by the outer peripheral portion, wherein an elongated width of each of the layers of continuous fibers extends transversely across the inner core portion and is disposed generally parallel with the second axis, and wherein the continuous fibers are disposed longitudinally within the body portion.

19. The structural component according to claim 18 , wherein the cross-section varies in size and/or shape along the longitudinal direction.

20. The structural component according to claim 18 , wherein the elongate body portion is shaped as a single-channel pipe, a multi-channel pipe, a circular pipe, a polygonal pipe, a rectangular beam, a circular beam, a triangular beam, an I-beam, a C-channel, an L-channel, a T-channel, a flat panel, or a curved panel.

Assignees

• Boeing Co

Inventors

• Coad Dennis L

Classifications

• B64C1/065

  Spars · CPC title

• B64C1/064

  Stringers; Longerons · CPC title

• E04C3/29 Primary

  built-up from parts of different material, {i.e. composite structures} · CPC title

• F16L9/121

  with three layers · CPC title

• E04C3/285

  of glass · CPC title