Intrumented patch for repair of fatigue damaged or sensitive structure
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United States of America Patent
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Sep 10, 1996
Issued Date -
N/A
app pub date -
Oct 19, 1995
filing date -
Nov 23, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for preventing, detecting, and predicting the formation and propagation of cracks in structural members. The apparatus includes a plurality of strain sensors integrally formed with a patch to be fixed to an area on the surface of a structural member. The patch operates to reduce stress levels in the patch-covered area for deterring the formation or propagation of a crack therein. The sensors monitor changes in the strain field in the patch-covered area for detecting crack formation and detection. The apparatus may also include a temperature-compensating strain sensor and a temperature sensor both integrally formed with the patch for detecting and predicting crack formation and propagation, respectively.
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