| 摘要 |
In accordance with an aspect of the present invention, there is provided a photoelastic coating for structural monitoring comprising an optically translucent or transparent photoelastic layer. The photoelastic coating is applied to the structure as a solvent-based liquid or gel that can be cured without heating. The photoelastic properties of the photoelastic layer can be used to detect stress and strain or plastic deformation in the structure using photoelastic techniques. In accordance with another aspect of the invention, there is provided a meth od of structural monitoring using a photoelastic structural monitoring coating. The method comprises the steps of providing a structure for which structural monitoring is desired, applying a photoelastic layer to said structure as a solvent-based liquid or gel, and curing said photoelastic layer in place on said structure. The method further comprises subjecting the structure to a load and inspecting the structure using photoelastic techniqu es to detect for stress and strain in the photoelastic layer. Presence of fringe patterns in the reflected light from said photoelastic layer indicates the presence of stress and strain in said photoelastic layer. Stress and strain in said photoelastic layer indicates stress and strain or plasticdeformation in the underlying structure.
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