Tom Jenkins...CIVA NA User Group Meeting August 19, 2020 Outline 1. How to Model PAUT Applications...
Transcript of Tom Jenkins...CIVA NA User Group Meeting August 19, 2020 Outline 1. How to Model PAUT Applications...
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Tom Jenkins
Ultrasonic Inspection:Transducer Design for Bolt Inspection
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Outline
1. How to Model PAUT Applications
2. What are the Major Steps in the Process
3. How We Solved Real-World Problems
4. Conclusions
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Project Overview Current inspection technique
Critical Requirements
Model Current technique for baseline. Model improvements
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
WhySAVINGS
BETTER POD
RELIABILITY
CONFIDENCE
TIME SAVINGS
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Outside Factors
• 16:64 / 32:128 / 64:128
• Linear / Sector / Matrix / DDF / FMC Instruments
• Flat, Curved, ID / OD
• Access
Inspection Locations
• Speed / POD / Data Storage
• Cost
Inspection Requirements
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Modeling Inputs
• Geometry
• MaterialSpecimen
• Acoustic Performance
• Style / Inspection Type
Probe / Wedge
• FBH , Notch, SDH, MultifacetedFlaws
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Specimen Types
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Verification
Modeled Results ≈ Empirical Results5MHz Segmented Annular Transducer
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Optimization
• Frequency
• Style
• Annular
• Matrix
• Segmented
• Virtual Probe
• Instrument Setting
• Angles
• Focus
Probe
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Probe Styles
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
BEAM PROFILES
• SOUND INTENSITY
• GEOMETRY RESTRICTIONS
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Optimizations – Variation Study
• PROBE SIZE
• REFRACTION ANGLE
• FREQUENCY
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Nuclear Vessel ShroudSupport Bolts
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Test Requirements / Inputs
• Contact test
• Full 360 scan electronically – eliminate need to rotate probe
• Fixed access area- max OD of probe 0.580”
• Set location for defects
• Maximum 32 element probe
• Topaz instrument
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Initial Model Setup
• Input bolt geometry
• Input current probe/wedge
• Add defects to bolt
• Verify model
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Optimization
Set-up 1
30 Elements12.7mm Element Dia12 Degree segments5 element Virtual probe1 element step0 Delay laws
Set-up 2
31 Elements12.7mm Element Dia36 Degree segments9 element Virtual probe1 sector element stepDirection & Depth Scan9 deg @ 25.4 to 17 degree @ 12.7
Set-up 3
31 Elements16mm Element Dia36 Degree segments9 element Virtual probe1 sector element stepDirection & Depth Scan9 deg @ 25.4 to 17 degree @ 12.7
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Model Results
• Larger diameter produced better response
• Delay caused noise issues (NOT SHOWN)
• Segmented outperformed annular
Set-up 1
Set-up 2
Set-up 3
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Prototype Design Build Model Results3 notchesThread noise
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Empirical Results
CLEAN EDM NOTCH 1 EDM NOTCH 2 EDM NOTCH 3
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Project Conclusion
• Production probes were made and used
for inspection with great results
• New order received for production
probes for other inspections
• New project for a smaller diameter bolt
with smaller access area started and
completed with customer
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CIVA NA User Group Meeting
August 19, 2020
CIVA NA User Group Meeting
August 19, 2020
Conclusions
• Modeling saves time
• Dozens of configurations modeled in a week compared to months to build custom probes
• Modeling saves money
• Confidence to manufacture one probe compared to multiple probes
• Modeling provides confidence
• Provided technical validation of inspection
• Model results can only be as good as the data provided to the model