The B. F. Goodrich Company

Goodrich Corporation

Philip William Sheehan

Ronnie Sze-Heng Liew

Modesto Martinez, Iii

John S Linck

Weiming Lu

Edward Lee Morris, Jr

James Michael Budd

John H Warren

Sundararaman Vaidyaraman

A system is disclosed comprising a carbon/carbon brake disk comprising a carbon fiber having a crystal orientation (CO) between 80% and 100% and a coefficient of friction of more than 0.183 in response to a rejected takeoff condition.

High performance carbon fiber

Systems and methods for forming a fibrous preform are disclosed. The method may comprise providing a plurality of needles comprising a barbed needle and a barbless needle and penetrating the fibrous preform with the plurality of needles.

Methods and systems for forming a fibrous preform

The invention relates to the field of forming fibrous structures by needling processes. A process is provided for achieving a desired Z-fiber distribution in a fibrous structure by controlling transport depth during formation of the fibrous structure in a series of needling passes. Each needling pass generates a portion of Z-fiber bundles that penetrate adjacent fibrous layers, the Z-fiber bundles penetrating only those adjacent fibrous layers that need more Z-fiber bundles to attain a predetermined number of Z-fiber bundles within each fibrous layer.

Process for forming fibrous structures with predetermined Z-fiber distributions

Process for forming fibrous structures with predetermined Z-fiber

The invention relates to the field of composite brake disks formed from fibrous structures. A brake disk according to the invention comprises an annular fibrous structure having two opposing generally planar faces and a binding matrix permeating the annular fibrous structure. Two outer portions are adjacent the planar faces, and an inner portion is disposed between the two outer portions. The two outer portions have lesser tensile strength parallel to the planar faces and greater resistance to wear than the inner portion.

Brake disk having a functional gradient Z-fiber distribution

The invention relates to the field of forming fibrous structures. A fibrous structure according to the invention has an upper group of fibrous layers and lower group of fibrous layers subjacent the upper group of fibrous layers. A multitude of Z-fiber bundles cohere the fibrous layers, each fibrous layer within the upper group of fibrous layers having a portion of the multitude of Z-fiber bundles originating in that fibrous layer and passing through a number of fibrous layers disposed beneath that fibrous layer without passing through all of the fibrous layers disposed beneath that fibrous layer. The number of fibrous layers penetrated by the Z-fiber bundles is constant within the first portion.

Laminar fibrous structure having Z-fibers that penetrate a constant

The invention relates to the field of needling processes for forming fibrous preform structures. The invention is particularly useful in forming fibrous preform structures suitable for subsequent processing into high temperature resistant composite structures such as carbon/carbon aircraft brake disks. The process according to the invention compensates for fiber pull back induced by fiber resilience, and for compaction in previously needled layers induced during subsequent needling passes. According to a further aspect of the invention, Z-fiber distribution throughout the thickness of the fibrous preform structure may be manipulated as necessary to achieve a desired distribution.

Process for forming fibrous preform structures

Fibrous substrates for the production of carbon and/or ceramic (including mixtures of these) fiber reinforced carbon and/or ceramic (including mixtures of these) composites and to methods of manufacture of same. A shaped fibrous structure comprising at least a first fibrous tape layer of a width generally corresponding to that of the fibrous structure to be formed, the first fibrous tape layer superposed upon and joined to least one other fibrous layer by needlepunching to produce cross-linking of the layers by fibers displaced out of the layers and extending in a direction generally perpendicular to the faces of the layers, and methods of making same. A shaped fibrous structure comprising at least a first fibrous tape layer formed from a plurality of tape portions each having a width substantially less than that of the fibrous structure to be formed, the selvedges of the tape portions being partially overlapped, the first fibrous tape layer superposed upon and joined to least one other fibrous layer by needlepunching to produce cross-linking of the layers by fibers displaced out of the layers and extending in a direction generally perpendicular to the faces of the layers, and methods of making same. The structure may include a plurality of helically wound fibrous tapes arranged to form a flat annulus having a plurality of interleaved fibrous layers. The structure may be used in the production of friction pads or discs.

Method of making near net shaped fibrous structures

Process for forming needled fibrous structures using determined

Test apparatus comprises a wheel means including a hub and wheel web rotatably mounted on wheel bearings set in the wheel hub and mounted on a non-rotatable axle mechanism. The wheel means is rotatable by motor means. A load application mechanism including hydraulic load cylinders and load sensors effects selective imposition of radial, axial and moment loading upon the wheel web, wheel hub and wheel bearings so that the bearings experience operting conditions during rotation and at rest. Acoustic sensing means enable determination of the onset of bearing failure. Operation of test apparatus is preferably controlled by a computer.

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Oldsmar, FL, United States of America

Philip William Sheehan