Self-stressing shape memory alloy-fiber reinforced polymer patch

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United States of America Patent

PATENT NO 11519175
APP PUB NO 20190330849A1
SERIAL NO

16507162

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Abstract

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A self-stressing shape memory alloy (SMA)/fiber reinforced polymer (FRP) composite patch is disclosed that can be used to repair cracked steel members or other civil infrastructures. Prestressed carbon FRP (CFRP) patches have emerged as a promising alternative to traditional methods of repair. However, prestressing these patches typically requires heavy and complex fixtures, which is impractical in many applications. This disclosure describes a new approach in which the prestressing force is applied by restraining the shape memory effect of nickel titanium niobium alloy (NiTiNb) SMA wires. The wires are subsequently embedded in an FRP overlay patch. This method overcomes the practical challenges associated with conventional prestressing.

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Patent Owner(s)

Patent OwnerAddress
UNIVERSITY OF HOUSTON SYSTEM316 E CULLEN HOUSTON TX 77204-2015

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dawood, Mina Cypress, US 2 2
El-Tahan, Mossab Houston, US 2 2

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