Surface Strain Measurements Using a 3D Scanning Laser Vibrometer

Hannah Weisbecker, Benjamin Cazzolato, Stuart Wildy, Steffen Marburg, John Codrington, Andrei Kotousov

    Research output: Contribution to journalArticlepeer-review

    15 Citations (Scopus)

    Abstract

    Three-dimensional scanning laser vibrometers enable extremely accurate non-contact measurement of the three-dimensional displacements on the surface of structures. This paper looks at the feasibility of using such a scanning laser vibrometer for the non-contact measurement of dynamic strain fields across the surface of a planar structure subjected to in-plane loading. Issues such as laser head alignment and choice of differentiation filter parameters are discussed. Finally, experimental results of two test specimens are presented which clearly demonstrate the significant potential of this new experimental technique as well as highlighting several limitations.

    Original languageEnglish
    Pages (from-to)805-815
    Number of pages11
    JournalExperimental Mechanics
    Volume52
    Issue number7
    DOIs
    Publication statusPublished - 2012

    Keywords

    • 3D laser scanning vibrometry
    • Displacement
    • Optical measurements
    • Strain

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