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Damage standard fabrication with attached sensor

  • US 7,230,421 B2
  • Filed: 03/02/2005
  • Issued: 06/12/2007
  • Est. Priority Date: 09/20/1999
  • Status: Expired due to Term
First Claim
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1. A method of fabricating a damage standard comprising:

  • attaching an electromagnetic sensor to a critical surface of test material, the sensor being mounted between layers of the test material;

    mechanically loading the test material and measuring a change in the electrical properties under the surface of the sensor; and

    removing the mechanical load when the change in electrical properties indicates a prescribed level of damage.

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