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US 4,530,197 AGranted
Thick core sandwich structures and method of fabrication thereof
AssigneeRockwell International Corporation
InventorGilles Rainville
Life of this patent
Estimating the term…
Abstract
A thick metallic sandwich structure having improved strength properties is formed by superplastic forming and selective metallurgical bonding. The structure normally includes at least five sheets (including two face sheets and at least three core sheets), wherein portions of the core sheets are bonded together to form a partially layered core.
Claims22
A metallic sandwich structure comprising:
- a first face sheet;
- a second face sheet spaced from said first face sheet;
- a first core sheet member positioned between said face sheets and metallurgically bonded at a plurality of first face nodes to said face sheets such that said first core sheet member extends transversely and linearly with substantially no eccentricity from one face sheet to the other in alternate sequence;
- and
- a second core sheet member positioned between said face sheets and metallurgically bonded at a plurality of second face nodes to said face sheets such that said second core sheet member extends transversely and linearly with substantially no eccentricity from one face sheet to the other in alternate sequence, said second face nodes positioned in alternate sequence along respective face sheets with said first face nodes, said second core sheet member being metallurgically bonded to said first core sheet member at a plurality of core nodes such that transverse support is provided to said first core sheet member.
2 more elements
A metallic sandwich structure comprising:
- a first face sheet;
- a second face sheet spaced from said first face sheet;
- a first core sheet member positioned between said face sheets and metallurgically bonded at a plurality a first face nodes to said face sheets such that said first core sheet member extends transversely from one face sheet to the other in alternate sequence;
- and
- a second core sheet member positioned between said face sheets and metallurgically bonded at a plurality of second face nodes to said face sheets such that said second core sheet member extends transversely from one face sheet to the other in alternate sequence, said first core sheet member being substantially thicker than said second core sheet member, said second face nodes positioned between said first face nodes, said second core sheet member being metallurgically bonded to said first core sheet member at a plurality of core nodes such that transverse support is provided to said first core sheet member.
2 more elements
A metallic sandwich structure which comprises:
- two face sheets;
- a layered core portion which is positioned between and metallurigically bonded to both of said face sheets forming face nodes, said layered core portion continuously running between said face sheets and forming acute angles relative to said face sheets;
- and
- an unlayered core portion which is positioned between said face sheets and metallurgically bonded to said face sheets forming face nodes, said unlayered core portion continuously running between said face sheets forming acute angles relative to said face sheets, and contacting said layered core portion forming core nodes.
1 more element
Dependencies are inferred from the claim text.