Structural crack monitoring technique

Details Structural crack monitoring technique Structural crack monitoring technique

1995-01-03

1996-07-09

Lusignan, Michael

Coating processes

Measuring, testing, or indicating

73104, B05D 300

Patent

active

055342892

ABSTRACT:
A method is disclosed for monitoring a structure for the formation of cracks and for providing protection of the structure from the environment, including the following steps: applying to the structure a first coating comprising microcapsules of a first color, applying over the first coating, a second coating having a second color, and identifying cracked portions which form in the structure by observing changes in the color of the second coating resulting from eruption of microcapsules in the first coating.

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Cheu, Y. F., "Automatic Crack Detection with Computer Vision and Pattern Recognition of Magenetic Particle Indications", American Society For Nondestructive Testing, Inc., Materials Evaluation, 42, Nov. 1984, pp. 1506-1510.
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Hopwood, Theodore II, P. E., "Acoustic Emission Inspection of Steel Bridges" Public Works, May 1988, pp. 66-69.
Dunker, Kenneth F., Rabbat, Basile G., "Why America's Bridges Are Crumbling"Scientific American, Mar. 1993, pp. 66-72.
Kuvin, Brad, F., "Expert Inspection of Steel Bridges", Welding Design and Fabrication, Aug. 1988.
"Microencapsulation" Encyclopedia of Polymer Science And Engineering, vol. 9, Second Edition, 1987, pp. 724-745.
Pillai, S. A., et al., "Detection and Characterization of Tight Cracks Using Photoelastic Coatings", The American Society For Nondestructive Testing, Inc., Materials Evaluation, Mar. 1992, pp. 367-371.
DeForest, A. V., Ellis, Greer, "Brittle Lacquers as an Aid To Stress Analysis", Journal of Aeronautical Sciences, 1940, pp. 205-208.

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