Abstract: In a structural element of high unidirectional rigidity, in which unidirectional fiber strands are completely embedded in sheaths and said sheaths are connected to a shell skin and wherein part of the shell skin is in the form of stringers, there is provided an inner division of the cross-section of the shell skin thereby providing the strength of the fibers and the stiffness of the fibers in a direction perpendicular to the skin plane for every direction of loading.
Type:
Grant
Filed:
October 5, 1999
Date of Patent:
March 12, 2002
Assignee:
Deutsches Zentrum fur Luft-und Raumfahrt E.V.
Inventors:
Matthias Piening, Arno Pabsch, Christof Sigle
Abstract: Composite products incorporating a polymer matrix, polymer microspheres, glass microspheres and natural fibers, particularly kenaf are described. The polymer microspheres are 15 to 50 microns in diameter and are smaller that the glass microspheres which are 50 to 200 microns in diameter. The polymer microspheres reduce voids and prevent cracking of the glass microspheres upon compression. The composites have low cost and high strength.
Type:
Grant
Filed:
May 16, 1997
Date of Patent:
February 9, 1999
Assignee:
Board of Trustees operating Michigan State University
Inventors:
Qing Zheng, Roger J. Morgan, Robert Jurek
Abstract: Fibrous substrates for the production of carbon and/or ceramic (including mixtures of these) fiber reinforced carbon and/or ceramic (including mixtures of these) matrix composites, particularly friction discs, and to methods of manufacture of same. Offcut waste fibrous sheet material may be recycled and reformed into a web useful in the manufacture of such composites.
Type:
Grant
Filed:
April 6, 1994
Date of Patent:
February 9, 1999
Assignee:
The B. F. Goodrich Company
Inventors:
Afshin Bazshushtari, Edward Lee Morris, Jr.
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