Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing...

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Effective Testing of Composite Laminates by Using A New Multi-Element Transducer Dr. Ralf Steinhausen 1 Dr. Mario Kiel 1 Andreas Bodi² Tobias Gautzsch² 1 Forschungszentrum Ultraschall Halle gGmbH, Germany, [email protected] ² SONOTEC Ultraschallsensorik Halle GmbH, Germany, [email protected]

Transcript of Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing...

Page 1: Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing of Composite Laminates by Using A New Multi-Element Transducer Dr. Ralf Steinhausen1

Effective Testing of Composite Laminates by

Using A New Multi-Element Transducer

Dr. Ralf Steinhausen1 Dr. Mario Kiel1

Andreas Bodi² Tobias Gautzsch² 1 Forschungszentrum Ultraschall Halle gGmbH, Germany, [email protected] ² SONOTEC Ultraschallsensorik Halle GmbH, Germany, [email protected]

Page 2: Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing of Composite Laminates by Using A New Multi-Element Transducer Dr. Ralf Steinhausen1

NDT in Canada 2018 | June 19-21 | Halifax, NS

OU

TL

INE

Introduction

Motivat ion

Phased-Array ACUT Probe

Broadband Mult i-Element ACUT Probe

Applicat ion

Test Results

Conclusion

Page 3: Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing of Composite Laminates by Using A New Multi-Element Transducer Dr. Ralf Steinhausen1

NDT in Canada 2018 | June 19-21 | Halifax, NS

Introduction

Page 4: Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing of Composite Laminates by Using A New Multi-Element Transducer Dr. Ralf Steinhausen1

NDT in Canada 2018 | June 19-21 | Halifax, NS

Motivat ion –

Frequency Dependent Flaw Detect ion

365 – 390 kHz 390 – 403 kHz 403 - 415 kHz 415 - 428 kHz 428 - 440 kHz

5 Scans

Equal Setup

5 different center frequencies

The detectability of delaminations and

the outline of the f law is frequency

dependent

High Bandw idth Transducers could lead

to a better detection and sizing of

delaminations

Test object: Composite w ith delamination

Spectral Analysis

Page 5: Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing of Composite Laminates by Using A New Multi-Element Transducer Dr. Ralf Steinhausen1

NDT in Canada 2018 | June 19-21 | Halifax, NS

Phased-Array ACUT Probe

3 Elements

Equally sized

Structured Electrode

Annular Array

Piezocomposite

Transducer

Dice and Fill

400 kHz

Small

Bandw idth

Single Peak

Spectrum

Page 6: Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing of Composite Laminates by Using A New Multi-Element Transducer Dr. Ralf Steinhausen1

NDT in Canada 2018 | June 19-21 | Halifax, NS

380 380 380 380

Broadband Mult i-Element ACUT

Probe 3 Elements

Equally sized area

Structured Electrode

Annular Array

380, 400 and 420

kHz Elements

Wider Bandw idth

Three Peak

Spectrum

Shorter A-Scan

Burst

400 kHz

420 kHz

380 kHz

Page 7: Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing of Composite Laminates by Using A New Multi-Element Transducer Dr. Ralf Steinhausen1

NDT in Canada 2018 | June 19-21 | Halifax, NS

Broadband Mult i-Element ACUT Probe –

Test Results

Page 8: Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing of Composite Laminates by Using A New Multi-Element Transducer Dr. Ralf Steinhausen1

NDT in Canada 2018 | June 19-21 | Halifax, NS

Applicat ion

400 kHz through

transmission

Phased-Array transducer

Ø2 mm detectable

Reference scan

Page 9: Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing of Composite Laminates by Using A New Multi-Element Transducer Dr. Ralf Steinhausen1

NDT in Canada 2018 | June 19-21 | Halifax, NS

Test Results - Scans

380 kHz 400 kHz 420 kHz

Differences in Amplitude drop

Differences in interference pattern

Less focused than the reference scan

Page 10: Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing of Composite Laminates by Using A New Multi-Element Transducer Dr. Ralf Steinhausen1

NDT in Canada 2018 | June 19-21 | Halifax, NS

Test Results – Spectral Analysis

Page 11: Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing of Composite Laminates by Using A New Multi-Element Transducer Dr. Ralf Steinhausen1

NDT in Canada 2018 | June 19-21 | Halifax, NS

Test Results – Exemplary Analysis

Page 12: Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing of Composite Laminates by Using A New Multi-Element Transducer Dr. Ralf Steinhausen1

NDT in Canada 2018 | June 19-21 | Halifax, NS

Conclusion

A w ider bandw idth can be achieved w ith dice and f ill composites

Spectral analysis can be used as a contrast mechanism w ith high

bandw idth probes

The detection and sizing of delamination and f law s in composites

can be improved w ith this contrast mechanism

Page 13: Effective Testing of Composite Laminates by Using A New Multi … 2018. 6. 29. · Effective Testing of Composite Laminates by Using A New Multi-Element Transducer Dr. Ralf Steinhausen1

NDT in Canada 2018 | June 19-21 | Halifax, NS

SONOTEC Ultraschallsensorik Halle GmbH

Nauendorfer Str. 2

06112 Halle (Saale)

Germany

www.sonotec.eu

Application Engineer NDT

Tobias Gautzsch

[email protected]

Headquarters

Germany

Ultrasound is our strength.

SONOTEC US Inc.

190 Blydenburgh Rd

Islandia, 11749 NY

USA

www.sonotecusa.com

Business Unit Director NDT

Manuel Lucas

[email protected]

+1(631)882-4132

North American

Sales and Stock

Office