Strain-detecting composite materials
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United States of America Patent
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Nov 22, 2016
Grant Date -
Jul 29, 2010
app pub date -
Jan 11, 2010
filing date -
Jan 9, 2009
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Abstract
A composite material includes a structural material and a shape-memory alloy embedded in the structural material. The shape-memory alloy changes crystallographic phase from austenite to martensite in response to a predefined critical macroscopic average strain of the composite material. In a second embodiment, the composite material includes a plurality of particles of a ferromagnetic shape-memory alloy embedded in the structural material. The ferromagnetic shape-memory alloy changes crystallographic phase from austenite to martensite and changes magnetic phase in response to the predefined critical macroscopic average strain of the composite material. A method of forming a composite material for sensing the predefined critical macroscopic average strain includes providing the shape-memory alloy having an austenite crystallographic phase, changing a size and shape of the shape-memory alloy to thereby form a plurality of particles, and combining the structural material and the particles at a temperature of from about 100-700° C. to form the composite material.
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Patent Owner(s)
- THE UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Alexa, Joel A | Hampton, US | 17 | 52 |
Glaessgen, Edward H | Yorktown, US | 4 | 4 |
Hailer, Benjamin T | Rome, US | 1 | 1 |
Horne, Michael R | Yorktown, US | 2 | 14 |
Messick, Peter L | Poquoson, US | 2 | 1 |
Piascik, Robert S | Williamsburg, US | 4 | 5 |
Smith, Stephen W | Newport News, US | 105 | 3160 |
Wallace, Terryl A | Yorktown, US | 1 | 1 |
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