Outlines

  Principles of Acoustic Emission Testing

• Characteristics of acoustic emission
• Continuous emission
• Burst emission
• Emission/signal levels and frequencies
• Sources of acoustic emission
• Sources in crystalline materials-introduction
• Sources in nonmetals-introduction
• Sources in composites-introduction
• Other sources
• Wave propagation-introduction
• Wave velocity in materials
• Attenuation
• Reflections-multiple paths
• Source input versus signal output
• Repeated loadings: Kaiser and Felicity effects and Felicity ratio
• In metals
• In composites
• Terminology (refer to acoustic emission glossary, ASTM E1316)

 

 

 

Sensing the Acoustic Emission Wave    

• Sensors
• Principles of operation
• Construction
• Frequency
• Sensor attachment
• Coupling materials
• Attachment devices

 

 

Instrumentation and Signal Processing

• Cables
• Coaxial cable
• Twisted pair cable
• Noise problems in cables
• Connectors
• Signal conditioning
• Preamplifiers
• Amplifiers
• Filters
• Units of again measurement
• Signal detection
• Threshold comparator
• Units of threshold measurement
• Sensitivity determined by gain and/or threshold
• Signal processing
• Waveform characteristics
• Discrimination techniques
• Distribution techniques
• Source location techniques
• Single channel location
• Linear location
• Planner location
• Other location techniques

 

Acoustic emission test systems

• Single channel systems
• Multichannel systems
• Dedicated industrial systems
• Accessory techniques
• Audio indicators
• X-Y and strip chart recording
• Oscilloscopes

 

Acoustic Emission Test Techniques

• Equipment calibration and setup for test
• Calibration signal generation techniques
• Calibration procedures
• Sensor placement
• Adjustment of equipment controls
• Discrimination technique adjustments
• Loading procedures
• Type of loading
• Maximum test load
• Load holds
• Repeated and programmed loadings
• Rate of loading
• Data display
• Selection of display mode
• Use and reading of different kinds of display
• Noise sources and pre-test identification techniques
• Electromagnetic noise
• Mechanical noise
• Precaution against noise
• Electrical shielding
• Electronic techniques
• Prevention of movement
• Attenuating materials and applications
• Data interpretation and evaluation: introduction
• Separating relevant acoustic emission indications from noise
• Accept/reject techniques and evaluation criteria
• Reports
• Purpose
• Content and structure

 

Codes, Standards and Procedures

• Guidetype standards (glossaries, calibration, etc.)
• Standardized/codified acoustic emission test procedures
• User-developed test procedures

Who Should Attend

 

• The course is designed for anyone who is interested in satisfying the classroom training requirements for Acoustic Testing Level I certifications or who needs a thorough knowledge and practical experience of Acoustic Testing Method.

Duration

5 Days