RAILWAY TIE USING STRAIN-HARDENING BRITTLE MATRIX COMPOSITES
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United States of America Patent
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Issued Date -
Jan 21, 2010
app pub date -
Jul 15, 2009
filing date -
Jul 15, 2008
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Abandoned
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Abstract
Railway tie is based upon a fiber-reinforced brittle matrix composite material. The composite material is isotropic, demonstrating pseudo-strain hardening behavior in uniaxial tension, and material ductility by design, not relying on reinforcing bars or mesh embedded within concrete or other brittle cementitious matrices for durability, abrasion resistance, or crack width control. Reinforcing bars or mesh, pretensioned or otherwise, may be used within the tie to control the load capacity and load-deformation response. The properties of this fiber-reinforced brittle matrix composite material are adjusted to preferably work with casting, injection molding, or extrusion manufacturing methods.
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