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Materials Evaluation with Full-field Laser NDT Techniques
Figure 1-4
Figure 1 — Speckle image of a rough surface.
Figure 2 — Displacement and distortion of the
speckle pattern due to deformation of the sample.
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Figure 3 — Dog bone test on an aluminum sample: (a) speckle image in nondeformed state; (b) longitudinal strain map just before fracture; (c) longitudinal strain versus force at point A; (d) transverse strain versus force at point.
(b)
Figure 4 — Optical ESPI: (a) setup for three-dimensional measurement; (b) measured out-of-plane deformation of a bended plate.
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