US 2025/0145273 A1 · DOUBLE Y-SHAPED SPAR MADE OF COMPOSITE MATERIAL

Abstract

A double Y-shaped cross-section spar (100) for an aircraft torsion box including a spar web (110) having an I-shaped cross-section, an upper part connected by the spar web (110), a lower part including lower flanges (130a, 130b) configured to be connectable to a first panel (1010) of the torsion box, a first cross-section opened triangular-shaped structure (120) including first and second lower vertices (120a, 120b) respectively joined to the lower flanges (130a, 130b) and an upper vertex (120c) connected to a first end of the spar web (110) and the upper part comprising upper flanges (130c, 130d) connectable to a second panel (1020) panel of the torsion box, a second cross-section opened triangular-shaped structure (140) including first and second upper vertices (140a, 140b) respectively joined to the upper flanges (130c, 130d) and a lower vertex (140c) connected to a second end of the spar web (110).

Claims19

Dependent claims

A double Y-shaped cross-section spar configured for a torsion box of an aircraft, the double Y-shaped cross-section spar comprising:

a spar web having an I-shape in cross section;
a lower part connected to a lower edge of the spar web, wherein the lower part includes:
lower flanges configured to connect to a first panel of the torsion box,
a cross-section of the lower part having an opened triangular-shape, and the lower part including:
first and second vertices respectively joined to the lower flanges and
an upper vertex connected to the lower edge of the spar web;
an upper part connected to an upper edge of the spar web, wherein the upper part includes:
upper flanges configured to be connectable to a second panel opposite the first panel of the torsion box of the aircraft;
a cross-section of the lower part having an opened triangular-shaped structure, and
first and second upper vertices respectively joined to the upper flanges;
and
a lower vertex connected to the upper edge of the spar web,
wherein an assembly of the lower part, the upper part and the spar web forms in cross section a double Y-shape.

10 more elements

A torsion box in an aircraft comprising:

a spar extending in a spanwise direction of the torsion box and having a double Y shape in cross-section, the spar comprising:
a spar web;
an upper first vertex at an upper edge of the spar web;
an upper pair of spar arms diverging as the upper pair of spar arms extend upwardly to respective upper second vertices;
upper spar flanges each connected to a respective one of the upper second vertices, wherein the upper spar flanges extend from the upper second vertices in opposing directions;
the lower first vertex at a lower edge of the spar web;
a lower pair of spar arms diverging as the lower pair of spar arms extend downwardly to respective lower second vertices;
lower spar flanges each connected to a respective one of the lower second vertices, wherein the lower spar flanges extend from the lower second vertices in opposing directions;
an upper panel including an inner surface connected to the upper spar flanges, and
a lower panel including an inner surface connected to the lower spar flanges.

7 more elements

Dependencies are inferred from the claim text.

Double y-shaped spar made of composite material

Life of this patent

Double y-shaped spar made of composite material

Life of this patent

Abstract

Claims19