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Materials Evaluation with Full-field Laser NDT Techniques
Figure 5-9
Figure 5 — Three-dimensional ESPI system in
tensile testing machine (Dantec Dynamics GmbH).
Figure 6 — ESPI test on a carbon fiber reinforced polymer sample:
(a) polymer structure; (b) longitudinal strain; (c) displacement,
showing beginning of fatigue; (d) after failure.
(b)
Figure 7 —
Brake disk testing: (a) sample; (b) amplitude of a
vibrating brake disk as revealed through ESPI.
Figure 8 — Shearography:
(a) principle; (b) measured out-of-plane
deformation gradient of a bended plate.
(b)
Figure 9- Delaminations of different
sizes in a composite material:
(a) schematic of effect under loading conditions;
(b) as revealed through butterfly patterns with ESPI.
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