The Boeing Company

Buddhadev Chakrabarti

Leanne L Lehman

William Preston Keith

Michael Leslie Hand

Gopal Prasad Mathur

Joshua Andrew Chua

Ali Yousefiani

Gopal P Mathur

Michael L Hand

A CMC sandwich used to fabricate CMC structures includes facesheets bonded to a core reinforced with a ceramic truss comprising an array of CMC pins. The binder matrix in the ends of the pins is removed, leaving exposed, flexible ceramic fibers. The exposed ceramic fibers are bent so as to extend parallel to the facesheets, and are bonded to one or more plies of the facesheets. The binder matrix in the ends of the ceramic pins may be removed by mechanical or chemical processes.

Composite structure having ceramic truss core and method for making the same

A laminated ceramic matrix composite structure is strengthened with one or more layers of a metal reinforcement. The metal reinforcement is selected to provide optimal strength and thermal compatibility with the ceramic matrix composite. The metal reinforcement includes an outer oxidized layer that bonds to the ceramic matrix composite. It may also include a barrier layer on the surface of the metal that helps prevent further oxidation. The structure is formed using standard composite prepreg layup techniques.

Method for making hybrid metal-ceramic matrix composite structures and structures made thereby

A polymer-based composite sandwich includes a reinforced core bonded between a pair of composite facesheets. The core includes a truss formed by groups of composite pins held in place by a layer of structural foam. The pins in the groups are radially arranged around nodes. The ends of the pins are splayed and sandwiched between the foam layer and the facesheets.

Composite structure having reinforced core and method of making the same

A polymer-based composite sandwich includes a core bonded between fiber reinforced resin facesheets. The core includes a truss formed by groups of composite pins held in a low density foam. The pins in each group intersect to form nodes adjacent to one of the facesheets. The ends of the pins extend parallel and are bonded to the facesheets.

Composite structure having reinforced core

Composite structure having reinforced core and method of making same

A composite structure and an associated exhaust washed structure are provided which may be formed of ceramic matrix composite (CMC) materials. A method of fabricating a composite structure which may include the CMC material is also provided. A composite structure may include a corrugated septum extending in a lengthwise direction. The composite structure may also include a flute within which the corrugated septum is disposed to form, for example, a partitioned flute assembly.

Exhaust washed structure and associated composite structure and method of fabrication

The present invention is directed toward a laminate composite structure and a method for fabricating a laminate composite structure, wherein the laminate composite structure comprises a solid laminate and a composite sandwich structure. The solid laminate includes a bend having composite pins inserted there through. The composite sandwich structure is comprised of a core material sandwiched between top and bottom composite face sheets.

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Walnut, CA, United States of America

Buddhadev Chakrabarti