1. Surface Strain Measurements Using a 3D Scanning Laser Vibrometer
- Author
-
John Codrington, Stuart Wildy, Steffen Marburg, Andrei Kotousov, Hannah Weisbecker, and Benjamin S. Cazzolato
- Subjects
Materials science ,business.industry ,Mechanical Engineering ,Aerospace Engineering ,Filter (signal processing) ,Laser ,Displacement (vector) ,law.invention ,Planar ,Optics ,Mechanics of Materials ,law ,Solid mechanics ,Head (vessel) ,Laser scanning vibrometry ,business ,Laser Doppler vibrometer - 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.
- Published
- 2011
- Full Text
- View/download PDF