Displacement Measurement by Laser Interferometry and Image Analysis

by A. Castro-Montero, Northwestern Univ, United States,
S. P. Shah, Northwestern Univ, United States,

Document Type: Proceeding Paper

Part of: Serviceability and Durability of Construction Materials


Laser holographic interferometry was used for the evaluation of displacement fields on concrete and fiber reinforced concrete specimens. Transmission holography was used to analyze mortar specimens loaded in tension (compact tension) and dog bone shaped uniaxial tension fiber reinforced cement paste specimens were analyzed using double exposure reflection holography. In both cases the holographic images were acquired by a digital image analysis system. Then, the image analysis system was used for automatic fringe count (and thus displacement calculation) and crack spacing measurement.

Subject Headings: Fiber reinforced concrete | Ultimate strength | System analysis | Displacement (mechanics) | Lasers | Imaging techniques | Reinforced concrete | Field tests

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