1. Shearography NDT - Introduction - Principle - Istra4D software
Shearography NDT
- Introduction
- Principle
- Istra4D software

2. Introduction
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3. Who needs NDT? …
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4. Examples of inspected parts
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5. Why choosing Q-810 Shearography NDT?
Repeatable measurements
Fast inspection
-> field-of-view of 20cm x 20cm
-> Up to 1m² inspected/minute
Detection Capabilities on Composite Materials
-> Disbonds, delaminations, wrinklings, etc
Tunable vacuum excitation
Option internal/external heat frame
Why choosing Q-810 Shearography NDT?
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6. The Shearography Principle
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7. The observed phenomenon
core
skin
Stress
out-of-plane surface displacement
underlying defect
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8. What do we need to create and detect this micro-displacement?
Monochromatic light
Laser diodes
Loading
Heat
Vibration
Vacuum
Compression/bending force …
Shearing Sensor
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9. Black-boxed Shearography Principle
CCD Chip
Shearing Setup
Test Object
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10. Black-boxed Shearography Principle
LOAD
CCD Chip
Shearing Setup
Test Object
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11. Black-boxed Shearography Principle
Reference State
Loaded State
Resulting Fringe Map
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12. Detailed Shearography Principle
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13. From Fringe Maps to Phase Maps: 4-step Algorithm
Phase Map Loaded State
Phase Map Reference State
λ/4
λ/2
Resulting Phase map
3λ/4
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14. Istra4D Software - Active mode - Evaluation mode
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15. Active mode: Main functions
1) Selecting/creating a repository
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16. Active mode: Main functions
2) Activate sensor
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17. Active mode: Main functions
3) Starting a new shear measurement setup
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18. Active mode: Main functions
4) Define brightness, shear vector, define the projection
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19. Active mode: Main functions
5) Switch between the different available displays and define their setup
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20. Active mode: Main functions
6) Start the acquisition
Take a reference
Excite the panel
Manually driven vacuum load
Single-Step Procedure
Multi-Step Procedure
Save current image (as often as you want)
Take new references (if needed)
Stop recording
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21. Evaluation mode: Main functions
1) Selecting a ShearSerie in the chosen repository
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22. Evaluation mode: Main functions
2) Reference selection and steps visualization
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23. Evaluation mode: Main functions
3) Selecting a display
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24. Evaluation mode: Main functions
3) Filters and gauges
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25. Finished! Questions and Answers
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