The Boeing Company

Frederick John Feiertag

Gary Robert Weber

Matthew Leroy Anderson

Takeshi Kawase

Michael J Reberg

Tyre Glenn Boss

Kelly William Meloy

Genji Mizushima

Simon R Walter

Ronald Hitzeman

Dale L McLellan

A monolithic structure for use as a pressure bulkhead for an aircraft includes a first web, a redundant second web spaced from the first web, stiffeners disposed between and connecting the webs to each other, and first and second outer attachment rings respectively provided on the outer peripheries of the first and second webs for attaching the bulkhead to fuselage structure. One of the webs comprises a pressure web for supporting pressure loading, and the other web defines at least one aperture therethrough. The stiffeners are integrally fabricated along with at least one of the webs and associated attachment ring as a one-piece monolithic part.

Monolithic structure with redundant load paths

Method of nondestructively measuring percent elongation or ductility of a cellular metallic. After surface preparation, the number of metal cells per unit area are counted, either manually or using an automated technique. The cell count is utilized in a relationship unique to the cellular metallic which correlates cell count to ductility in terms of percent elongation. The effects of the structural configuration of the cellular metallic, porosity and eutectic morphology are also discussed.

Method for the nondestructive testing of cellular metallics

Growing community of inventors

Seatac, WA, United States of America

Frederick John Feiertag