Photoelastic coating for structural monitoring
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United States of America Patent
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Apr 30, 2013
Grant Date -
Dec 17, 2009
app pub date -
Jun 10, 2009
filing date -
Jun 16, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A photoelastic coating for structural monitoring of bridges, buildings, and other structures comprises an optically translucent or transparent photoelastic layer. The photoelastic coating is applied to the structure as a solvent-based liquid or gel. The photoelastic properties of the photoelastic layer are used to detect stress and strain or plastic deformation in the structure using photoelastic techniques. Also described is a method of structural monitoring comprising applying a photoelastic coating to a structure as a solvent-based liquid or gel. Presence of fringe patterns in the reflected light from the photoelastic layer indicates the presence of stress and strain in the photoelastic layer. Stress and strain in the photoelastic layer indicates stress and strain or plastic deformation in the underlying structure. The invention can be used for detecting when structures have been overloaded or when stress limits have been exceeded.
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