Strain-detecting composite materials

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United States of America Patent

PATENT NO 9499882
APP PUB NO 20100190026A1
SERIAL NO

12685280

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Abstract

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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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