Structural members having improved resistance to fatigue crack growth
OwnerMatthew D. Garratt, Gary H. Bray +2inventors
InventorsMatthew D. Garratt, Gary H. Bray, Diana K. Denzer, Patrick Ulysse
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Abstract
An extruded structural member having improved damage tolerance. The structural member comprising: a base section; a rib stiffening section having at least one pair of structural ribs, the structural ribs integral with the base section and projecting outwardly thereof; and at least one intra-rib area positioned between the pair of structural ribs, the intra-rib area having a microstructure with intentionally increased amounts of fiber texture to reduce the rate of fatigue crack growth in the extruded structural member.
Claims37
An extruded structural member having improved damage tolerance, said structural member comprising:
- at least one area having a substantially unrecrystallized microstructure with intentionally increased amounts of fiber texture to reduce the rate of fatigue crack growth in said extruded structural member.
An extruded structural member having improved damage tolerance, said structural member comprising:
- a base section;
- a rib stiffening section having at least one pair of structural ribs, said structural ribs are integral with said base section and projecting outwardly thereof;
- and
- at least one intra-rib area positioned between said pair of structural ribs, said intra-rib area having a microstructure with intentionally increased amounts of fiber texture to reduce the rate of fatigue crack growth in said extruded structural member.
A wrought aluminum alloy structural member having improved fatigue crack gowth resistance, said structural member comprising areas with intentionally increased fiber texture.
Dependencies are inferred from the claim text.