Multiple density sandwich structures and method of fabrication

Details Multiple density sandwich structures and method of fabrication Multiple density sandwich structures and method of fabrication

1994-02-14

1995-09-19

Zimmerman, John

Stock material or miscellaneous articles

All metal or with adjacent metals

Honeycomb, or with grain orientation or elongated elements...

428594, 428636, 428660, B32B 328, B32B 1500

Patent

active

054514720

ABSTRACT:
A method to superplastic form sandwich structures is provided. A series of worksheets are joined together at selected locations through the use of partial penetration welding. The worksheets are subsequently superplastic formed in order to form a sandwich structure. The method allows a different number of worksheets to be used at different points throughout the sandwich structure. This results in a sandwich structure with a different internal reinforcement at different locations in the sandwich structure. In the preferred embodiment, a wing is fabricated from a series of worksheets partial penetration welded together using a laser. The worksheets are superplastic formed to producing a wing with a different internal reinforcement at two or more locations in the wing.

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