ST – LEVEL 1 SHEAROGRAPHY TESTING

Public:

All Non destructive testing Agent concerned by a level 1 certification.
During the certification exam of level 1 shearography testing, the questionnaires relating to the specific part relate more particularly to procedures used in the aircraft industry.
The subjects treated during the training (general and specific) are:

OPERATORS: (1 hour)
- Presentation of world-wide, European and national (COFREND COSAC) NDT organisations and specificity about visual and medical abilities,

EQUIPEMENTS: (2 hours)
- Knowledge about a shearographic assembly and principle adjustment of significant parameters.

TECHNIQUES: (9 hours)
* Basis principle: light, speckle, interference
* Shearographic comparison and TV-holography (ESPI)
* Stress: thermal, vibrating, mechanic, compressive/depressive
* Parts:
Surface state and influence of it.
* LASERS:
Physic principle, parts, classification, security,
* Calibrating:
Influence of the parameters and type of stress
* Adjustments:
Shearing
Stress variations
LASER beam width
* Results interpretation:
Defect location and measurement

PRACTICAL APPLICATION TO MATERIAL: (4 hours)
Influence of material type used in aeronautic depending of kind of stress.
Composite testing.
Adhesive control.
Rubber made piece testing

HEALTH AND CARE: (2 hours)
Classification legislation about LASER.
Stress system hazard (heat, inflatable,…)
Product used to bring surface unpolished.

FILLING A CONTROL RECORD (2 hours)
TOTAL time of formal training hours for level 1 ST: 20 hours

ST – LEVEL 2 SHEAROGRAPHY TESTING

Public:

All Non destructive testing Agent concerned by a level 2 certification. During the certification exam of level 2 shearography testing, the questionnaires relating to the specific part relate more particularly to procedures used in the aircraft industry.
The subjects treated during the training (general and specific) are:

OPERATORS: (2 hours)
- Presentation of world-wide, European and national (COFREND COSAC) NDT organisations and specificity about visual and medical abilities,

EQUIPEMENTS: (6 hours)
- Knowledge about a shearographic assembly and principle adjustment of significant parameters.
- Influence of the optical parts

TECHNIQUES: (28 hours)
* Basis principle: light, speckle, interference
* Shearographic comparison andTV-holography (ESPI)
* Stress: thermal, vibrating, mechanic, compressive/depressive
* Parts:
Surface state and influence of it.
Kind of influence
* LASERS:
Physic principle, parts, classification, security,
* Calibrating:
Influence of the parameters and type of stress
* Adjustments:
Shearing
Stress variations
LASER beam width
* Results interpretation:
Limits of the method
Defect location and measurement
Defect depth evaluation

PRACTICAL APPLICATION TO MATERIAL: (8 hours)
Influence of material type used in aeronautic depending of kind of stress.
Composite testing.
Adhesive control.
Rubber made piece testing

HEALTH AND CARE: (4 hours)
Classification legislation about LASER.
Stress system hazard (heat, inflatable,…)
Product used to bring surface unpolished.

ESTABLISHMENT OF PROCEDURE: (12 hours)
Establishment of a procedure including a control statement or a control report

TOTAL time of formal training hours for level 2 ST: 60 hours

ST – LEVEL 3 SHEAROGRAPHY TESTING

Public:

All Non destructive testing Agent concerned by a level 3 certification.
During the certification exam of level 3 shearography testing, the questionnaires relating to the specific part relate more particularly to procedures used in the aircraft industry.
The subjects treated during the training (general and specific) are :

OPERATORS:
- Presentation of world-wide, European and national (COFREND COSAC) NDT organisations and specificity about visual and medical abilities, - Formation and industrial experiment,.

EQUIPEMENTS:
- Knowledge about a shearographic assembly and principle adjustment of parameters. - Equipment for manual controls in plant or on site . - Equipment for controls mechanised, motorised, automatic shift control mechanism.
- Usual kind of shearographic test equipment automatic shift control mechanism automatic adjustment control mechanism, automatic calibrating, result recording, graphics .
- Specific machinery for parts to be controlled,
- Performance should be compatible with the control criteria.

METHOD:
* Choice of the method:
- Influence of the limits of detection and resolution, - Operating phenomenon, thermal stress pneumatic stress vibrating stress mechanic stress
* Choice of the means:
- Shearographic system Hung, Michelson, Mach Zender.
- Technology all in one,
independent camera, autonomous system.
- Standard part normalised, for specific control, type and characteristics of the normalised defects.

PARTS PHYSICAL PRINCIPLES:
- Surface state, geometry, micro geometry.
- Material, nature, structure, isotropy, mechanic characteristics, geometry et local structure (bonding).

OPERATING TECHNICS:
-Specifications, “in house” specification complementary to official standards, procedure, specification to qualify the installations, specifications of periodic installations check.
-Means of detection, visual alarms, sonic alarms, recordings, stop on defect.

DEFECT INDICATION:
- Defect, nature, structure, geometry, surface micro geometry, position, orientation, dimensions,
- Results Interpretation on screen, on record, discrimination artefacts/defects, raise of doubt: complement or replacement of other control methods.
- Data recorded interpretation.
Establishment of a procedure including a control statement or a control report.

VERIFICATION:
- Periodic control, Choice of standard (advantages, disadvantages artificial defects), Calibrating procedure, Reference signification to defect evaluation, Accordance with criteria
- Quality, Equipment, Personals, Procedures.

HEALTH AND CARE:
Classification legislation about LASER.
Stress system hazard (heat, inflatable,…)
Product used to bring surface unpolished.